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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Reserve</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restructuring Reserve, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding exit charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Revenues from External Customers and Long-Lived Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EstimatedInsuranceRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Insurance receivable -- asbestos, beginning of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EstimatedInsuranceRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance receivable - asbestos</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EstimatedInsuranceRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Insurance receivable &#8211; asbestos, end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EstimatedInsuranceRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Insurance Recoveries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finance Lease, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Related Party Transactions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract Asset Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract asset net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PercentageOfLIFOInventory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of inventories valued on the LIFO method</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PercentageOfLIFOInventory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of LIFO Inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, primarily impact from changes in foreign currency exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsTranslationAndPurchaseAccountingAdjustments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Translation and Purchase Accounting Adjustments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtInstrumentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Outstanding Borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtInstrumentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TerminationGainExpectedToBeReleased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination gain expected to be released</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TerminationGainExpectedToBeReleased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Termination Gain Expected to be Released</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TerminationGainExpectedToBeReleased_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Termination gain expected to be released.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from the exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Warrant Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from shareholder exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Union Electric Steel UK Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Union Electric Steel U K Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Union Electric Steel UK Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">UES-UK [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Other Observable Inputs (Level 2) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingent Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowHedgingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flow Hedges [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowHedgingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow Hedging [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncurrentLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncurrent Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AUPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AUP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AUPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AUP.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AUPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AUP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyClaimsDismissedNumber_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Claims dismissed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyClaimsDismissedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Claims Dismissed, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowancesAndReservesTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SEC Schedule, 12-09, Valuation Allowances and Reserves Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowancesAndReservesTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash and Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquityRightsOfferingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Rights Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquityRightsOfferingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Rights Offering [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquityRightsOfferingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure of equity rights offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Credit for asbestos litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit for asbestos litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement, Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Credit for asbestos litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Credit for asbestos litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MaximumRevolvingAdvanceAmountPercentageOfUndrawnAvailabilityOfCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Revolving Advance Amount Percentage Of Undrawn Availability Of Credit Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MaximumRevolvingAdvanceAmountPercentageOfUndrawnAvailabilityOfCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum revolving advance amount percentage of undrawn availability of credit agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MaximumRevolvingAdvanceAmountPercentageOfUndrawnAvailabilityOfCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum revolving advance amount percentage of undrawn availability of credit agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Defined Benefits Pension Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Foreign Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NaturalGasUsageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Natural Gas Usage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NaturalGasUsageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Natural Gas Usage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NaturalGasUsageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Natural gas usage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets exchanged for lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right-of-Use Asset Obtained in Exchange for Operating Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeriesAWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Accumulated Other Comprehensive Loss [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Term Purchase Commitment, Category of Item Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Purchase Commitment, Category of Item Purchased [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity based awards grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CeasedBeneficiallyStockOwnershipPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ceased beneficially stock ownership percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CeasedBeneficiallyStockOwnershipPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ceased beneficially stock ownership percentage1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CeasedBeneficiallyStockOwnershipPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ceased beneficially stock ownership percentage1.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfLossContingenciesByContingencyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Loss Contingencies by Contingency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfLossContingenciesByContingencyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Loss Contingencies by Contingency [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromDisbursementAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from disbursement agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromDisbursementAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from disbursement agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromDisbursementAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from disbursement agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and shareholders&#8217; equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of long-term marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfEmployeesInExistingBenefitPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Employees In Existing Benefit Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfEmployeesInExistingBenefitPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of employees in existing benefit plans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfEmployeesInExistingBenefitPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of employees under existing benefit plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hedging Relationship</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hedging Relationship [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalAdditionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Capital Expenditures [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalAdditionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Additions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalAdditionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Addition Purchase Commitments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostCreditExcludingServiceCostStatementOfIncomeOrComprehensiveIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LesseeLeasingArrangementOperatingLeaseFullyExtendedExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Leasing Arrangement Operating Lease Fully Extended Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LesseeLeasingArrangementOperatingLeaseFullyExtendedExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lessee Leasing Arrangement Operating Lease Fully Extended Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LesseeLeasingArrangementOperatingLeaseFullyExtendedExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extended lease expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTaxStatusDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Tax Status [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTaxStatusDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Tax Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfIndustrialRevenueBonds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of industrial revenue bonds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfIndustrialRevenueBonds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Industrial Revenue Bonds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfIndustrialRevenueBonds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of industrial revenue bonds.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherLiabilitiesDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Liabilities Disclosure [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherLiabilitiesDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Disclosure [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherLiabilitiesDisclosureTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other liabilities disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentExpenditureAdditionToLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Expenditures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentExpenditureAdditionToLongLivedAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment, Expenditure, Addition to Long-Lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Inventory, Current [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated recovery under credit agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated recovery under credit agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated recovery under credit agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital, Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AsbestosClaimsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asbestos Claims [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AsbestosClaimsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asbestos Claims [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AsbestosClaimsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Asbestos claims.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EuropeanCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">European Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EuropeanCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">European Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EuropeanCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">European credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Effective interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest at a floating rate on tax-exempt IRB maturing in 2027/2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate During Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property Plant And Equipment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TriggerPeriodUnderTheCreditAgreementForStructuredInsolvency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trigger Period under the Credit Agreement for Structured Insolvency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TriggerPeriodUnderTheCreditAgreementForStructuredInsolvency_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trigger period under the credit agreement for structured insolvency.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TriggerPeriodUnderTheCreditAgreementForStructuredInsolvency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trigger period under the credit agreement for structured insolvency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Employee Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional benefits earned by the employees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forged and Cast Engineered Products [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forged And Cast Engineered Products [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forged and cast engineered products.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">FCEP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDateDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDateDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, maturity date, description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CentrifugalPumpsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Centrifugal Pumps [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CentrifugalPumpsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Centrifugal Pumps [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CentrifugalPumpsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Centrifugal pumps.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Repayments of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrual_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Standard Product Warranty Accrual, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrual_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrual_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrual_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Standard Product Warranty Accrual</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pension and Other Postretirement Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Benefits [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherShareIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation arrangement by share-based payment award, other share increase (decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherShareIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Other Share Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Loss on disposal of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss (income) on disposal of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gain) loss on disposal of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfAsbestosAdjustmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Activity in Asbestos Insurance Recoveries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfAsbestosAdjustmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Asbestos Adjustments Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfAsbestosAdjustmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of asbestos adjustments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues from External Customers and Long-Lived Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FEP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forged Engineered Products [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedEngineeredProductsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forged engineered products.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finished goods</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Finished Goods, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IssuanceOfCommonStockTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Excess tax benefits on the issuance of common stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IssuanceOfCommonStockTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Common Stock Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IssuanceOfCommonStockTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AnnualRentAdjustmentToRepayRestatedLease_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Annual Rent adjustment to repay restated lease.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AnnualRentAdjustmentToRepayRestatedLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Annual rent adjustment to repay restated lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payment of debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMachineryAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Machinery and equipment purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMachineryAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Machinery and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MaterialReconcilingItemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciling Item, Excluding Corporate Nonsegment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholders&#8217; equity:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pension Plans Postretirement And Other Employee Benefits [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pension Plans Postretirement And Other Employee Benefits [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pension Plans Postretirement And Other Employee Benefits [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AlloysUnlimitedAndProcessingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alloys Unlimited and Processing, LLC.[Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AlloysUnlimitedAndProcessingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alloys Unlimited and Processing, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AlloysUnlimitedAndProcessingLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alloys Unlimited and Processing, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Retained deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustment to opening retained deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Retained Earnings (Accumulated Deficit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentInterestRateEffectivePercentageDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective interest rate during period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentInterestRateEffectivePercentageDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Effective Percentage During Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentInterestRateEffectivePercentageDuringPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument interest rate effective percentage during period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographic Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Individual Foreign Countries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnauditedCondensedConsolidatedFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unaudited Condensed Consolidated Financial Statements [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnauditedCondensedConsolidatedFinancialStatementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unaudited condensed consolidated financial statements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForCreditLossAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance for Credit Loss [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Schedule13DFiledDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule 13D filed date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Schedule13DFiledDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule 13D filed date1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Schedule13DFiledDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule 13D filed date1.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquityInterestInNumberOfJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity interest in number of joint ventures.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquityInterestInNumberOfJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Interest In Number Of Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquityInterestInNumberOfJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity interest in number of joint venture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized Employee Benefit Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Contract with Customer, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Payment Terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal payments term, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Costs of products sold (excluding depreciation and amortization) (futures contracts - copper and aluminum)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount released to pre - tax earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Costs of products sold (excluding depreciation and amortization)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Costs of products sold (excluding depreciation and amortization) (futures contracts - copper and aluminum)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs of products sold (excluding depreciation and amortization) (futures contracts - copper and aluminum)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated to be Reclassified in the Next 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities and Shareholders&#8217; Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Provided by (Used in) Operating Activities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash flows provided by (used in) operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDerivativeInstrumentsAmountOfChangeInFairValueReclassifiedOrExpectedToBeReclassifiedFromAccumulatedOtherComprehensiveIncomeLossToEarningsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Change in Fair Value Reclassified or Expected to be Reclassified from Accumulated Other Comprehensive Loss to Earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDerivativeInstrumentsAmountOfChangeInFairValueReclassifiedOrExpectedToBeReclassifiedFromAccumulatedOtherComprehensiveIncomeLossToEarningsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Derivative Instruments Amount Of Change In Fair Value Reclassified Or Expected To Be Reclassified From Accumulated Other Comprehensive Income Loss To Earnings Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDerivativeInstrumentsAmountOfChangeInFairValueReclassifiedOrExpectedToBeReclassifiedFromAccumulatedOtherComprehensiveIncomeLossToEarningsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of derivative instruments amount of change in fair value reclassified or expected to be reclassified from accumulated other comprehensive income loss to earnings.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgingRelationshipDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hedging Relationship</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgingRelationshipDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hedging Relationship [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherOperatingIncomeExpenseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Operating Income (Expense), Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherOperatingIncomeExpenseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income - net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Effective Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AkersABMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Akers AB [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AkersABMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Akers A B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AkersABMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Akers AB [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other non-cash charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfSubsidiariesForUsageOfElectricityUnderExistingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of subsidiaries for usage of electricity under existing commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfSubsidiariesForUsageOfElectricityUnderExistingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Subsidiaries For Usage Of Electricity Under Existing Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfSubsidiariesForUsageOfElectricityUnderExistingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of subsidiaries for usage of electricity under existing commitments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Asbestos liability, beginning of the year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Asbestos liability, end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Accrual</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental information:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnpaidPrincipalPlusAccruedAndUnpaidInterestAndAllUnpaidFeesAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid principal plus accrued and unpaid interest and all unpaid fees and expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnpaidPrincipalPlusAccruedAndUnpaidInterestAndAllUnpaidFeesAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unpaid Principal Plus Accrued And Unpaid Interest And All Unpaid Fees And Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnpaidPrincipalPlusAccruedAndUnpaidInterestAndAllUnpaidFeesAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unpaid principal plus accrued and unpaid interest and all unpaid fees and expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract Assets [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: Net income attributable to noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income tax payments (net of refunds)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Taxes Paid, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiary, Ownership Percentage, Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership interest percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Allowance for credit losses on trade receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for credit losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line Of Credit Facility [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net decrease in cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net decrease in cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsAdditionalRevenueEarnedOnNewAndExistingContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract Assets Additional Revenue Earned On New And Existing Contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsAdditionalRevenueEarnedOnNewAndExistingContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract assets additional revenue earned on new and existing contracts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsAdditionalRevenueEarnedOnNewAndExistingContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional revenue earned on new and existing contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOperatingActivitiesSegmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Activities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOperatingActivitiesSegmentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Continuing Operations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirHandlingSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Air Handling Systems [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirHandlingSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Air Handling Systems [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirHandlingSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Air handling systems.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ConstructionInProcessMachineryAndEquipmentOrBuildingsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction In Process Machinery And Equipment Or Buildings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ConstructionInProcessMachineryAndEquipmentOrBuildingsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Construction in process machinery and equipment or buildings.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ConstructionInProcessMachineryAndEquipmentOrBuildingsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction-in-Process, Machinery and Equipment or Buildings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Loss Contingency Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalLossContingencyDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Matters</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BaseRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BaseRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Base Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Sponsor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Sponsor Location [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Restructuring Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other non-cash charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instruments [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfDerivativeInstrumentsHoldsForTradingPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of derivative instruments holds for trading purposes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfDerivativeInstrumentsHoldsForTradingPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Derivative Instruments Holds For Trading Purposes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfDerivativeInstrumentsHoldsForTradingPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of derivative instruments holds for trading purposes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ATRMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ATRMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">A T R [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ATRMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ATR.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification out of Accumulated Other Comprehensive Income [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Related Party Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Repayments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayments of related party debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Anticipated purchases, hedged</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_OwnershipDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ownership [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Changes in Liability for Product Warranty Claims</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfProductWarrantyLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Product Warranty Liability [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments in joint ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Relationships [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Relationships [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SecuredOvernightFinancingRateSofrAdjustmentMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Secured overnight financing rate SOFR adjustment margin.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SecuredOvernightFinancingRateSofrAdjustmentMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate SOFR Adjustment Margin [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SecuredOvernightFinancingRateSofrAdjustmentMarginMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Secured Overnight Financing Rate SOFR Adjustment Margin [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit, remaining borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Remaining Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive (loss) income attributable to Ampco-Pittsburgh</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventorySuppliesNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventorySuppliesNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Supplies, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CommitmentsAndContingentLiabilitiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingent Liabilities [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CommitmentsAndContingentLiabilitiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingent Liabilities [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CommitmentsAndContingentLiabilitiesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments And Contingent Liabilities [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalLossContingencyStatementOfFinancialPositionExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_RevenuesFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net sales to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_RevenuesFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues From Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_RevenuesFromRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenues from related parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Professional Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalFees_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Professional service costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized employee benefit costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive income (loss):</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Postretirement Benefit Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Postretirement Benefits Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sale of long-term marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale and Maturity of Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SaleAndLeasebackFinancingObligationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale and Leaseback Financing Obligations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SaleAndLeasebackFinancingObligationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale And Leaseback Financing Obligations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SaleAndLeasebackFinancingObligationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale and leaseback financing obligation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationReserveCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Litigation Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationReserveCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asbestos liability &#8211; current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DefinedContributionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defined Contribution Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DefinedContributionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DefinedContributionPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Defined contribution plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other noncurrent assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FiniteAndIndefiniteLivedIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite And Indefinite Lived Intangible Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FiniteAndIndefiniteLivedIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite And Indefinite Lived Intangible Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FiniteAndIndefiniteLivedIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Finite And Indefinite Lived Intangible Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnContractTermination_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Contract Termination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnContractTermination_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AsbestosReceivableDueToIncreaseInAsbestosLiabilityAndLowerDefenseToIndemnityRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Asbestos receivable due to increase in asbestos liability and lower defense to indemnity ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AsbestosReceivableDueToIncreaseInAsbestosLiabilityAndLowerDefenseToIndemnityRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asbestos receivable due to increase in asbestos liability and lower defense to indemnity ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LeaseRepurchasePercentageOnLessorInvestmentsForProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease repurchase percentage on lessor investment for properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LeaseRepurchasePercentageOnLessorInvestmentsForProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Repurchase Percentage On Lessor Investments For Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LeaseRepurchasePercentageOnLessorInvestmentsForProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease repurchase percentage on lessor investment for properties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromReimbursementOfPastEnergyCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from reimbursement of past energy costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromReimbursementOfPastEnergyCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from reimbursement of past energy costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Loss [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets, Major Class Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SummaryOfChangesInContractAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Changes In Contract Assets [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SummaryOfChangesInContractAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of changes in contract assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SummaryOfChangesInContractAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Changes in Contract Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PercentageOfAnticipatedPurchasesHedged_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of anticipated purchases hedged</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PercentageOfAnticipatedPurchasesHedged_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Anticipated Purchases Hedged</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PercentageOfAnticipatedPurchasesHedged_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of anticipated requirements which are covered by cash flow hedges.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromEquipmentFinancingFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from equipment financing facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromEquipmentFinancingFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from equipment financing facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromEquipmentFinancingFacility_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Equipment Financing Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossGainLossFromCashFlowHedgesEffectNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning of the Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossGainLossFromCashFlowHedgesEffectNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">End of the Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossGainLossFromCashFlowHedgesEffectNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income Loss Gain Loss From Cash Flow Hedges Effect Net Of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossGainLossFromCashFlowHedgesEffectNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accumulated other comprehensive income (loss), gain (loss) from cash flow hedges effect net of tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee, operating lease, option to extend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Option to Extend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Frequency of payment and payment terms, description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfPaymentAndPaymentTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Frequency of Payment and Payment Terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StockIssuedDuringPeriodValueWarrantExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Warrant Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StockIssuedDuringPeriodValueWarrantExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock issued during period, value, warrant exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StockIssuedDuringPeriodValueWarrantExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholder exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MesotheliomaClaimMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Mesothelioma claim.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MesotheliomaClaimMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mesothelioma Claim [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MesotheliomaClaimMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mesothelioma Claims [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TaxExemptIndustrialRevenueBondTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Exempt Industrial Revenue Bond Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TaxExemptIndustrialRevenueBondTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tax Exempt Industrial Revenue Bond Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TaxExemptIndustrialRevenueBondTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tax exempt industrial revenue bond two.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Selling, General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification out of Accumulated Other Comprehensive Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification out of Accumulated Other Comprehensive Income [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_HeatExchangeCoilsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Heat Exchange Coils [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_HeatExchangeCoilsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Heat Exchange Coils [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_HeatExchangeCoilsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Heat exchange coils.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsOtherPrimarilyChangesInForeignCurrencyExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract Assets Other Primarily Changes In Foreign Currency Exchange Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsOtherPrimarilyChangesInForeignCurrencyExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract assets other primarily changes in foreign currency exchange rates.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsOtherPrimarilyChangesInForeignCurrencyExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, primarily changes in foreign currency exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive Income (Loss), Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax effect due to certain amounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MinorityShareholderLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minority Shareholder Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MinorityShareholderLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minority Shareholder Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_MinorityShareholderLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minority shareholder loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares can purchase for each warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Each Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization of intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FuturesContractsCopperAndAluminumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Futures Contracts - Copper and Aluminum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FuturesContractsCopperAndAluminumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Futures Contracts Copper And Aluminum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FuturesContractsCopperAndAluminumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Futures contracts copper and aluminum.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Unobservable Inputs (Level 3) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from revolving credit facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Long-Term Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Financial Assets and Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CondensedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unaudited Condensed Consolidated Financial Statements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CondensedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Financial Statements Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CondensedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosures about the basis of financial statement preparation. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ClassOfWarrantOrRightExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of warrant or right, expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ClassOfWarrantOrRightExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ClassOfWarrantOrRightExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right, expiration date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Receivable, after Allowance for Credit Loss, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trade receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Trade receivables, less allowance for credit losses of $321 as of March 31, 2026 and $242 as of December 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_WarrantExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price per warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_WarrantExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_WarrantExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant exercise price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee, operating term period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseRenewalTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Renewal Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingent liabilities (Note 10)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowancesAndReservesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SEC Schedule, 12-09, Valuation Allowances and Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowancesAndReservesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Service Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification Out Of Accumulated Other Comprehensive Income [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification out of Accumulated Other Comprehensive Income [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CeasedDateOfBeneficialStockOwnership1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ceased date of beneficial stock ownership</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CeasedDateOfBeneficialStockOwnership1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ceased date of beneficial stock ownership1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CeasedDateOfBeneficialStockOwnership1_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ceased date of beneficial stock ownership1.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, Allowance for Credit Loss, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Work-in-process</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Work in Process, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandLeaseExpiryYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land lease expiry year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandLeaseExpiryYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land Lease Expiry Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandLeaseExpiryYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Land lease expiry year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Outstanding borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt and Lease Obligation, Including Current Maturities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument basis spread</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Basis Spread on Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentFixedChargeCoverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed charge coverage ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentFixedChargeCoverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Fixed Charge Coverage Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentFixedChargeCoverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument fixed charge coverage ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forecast [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forecast [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncrementalPercentageOnAnnualLeasePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Percentage On Annual Lease Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncrementalPercentageOnAnnualLeasePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Incremental percentage on annual lease payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncrementalPercentageOnAnnualLeasePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incremental percentage on annual lease payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Category of Item Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Category of Item Purchased [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_STOREMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">STORE [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_STOREMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">S T O R E [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_STOREMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">STORE.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentContinuingOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Continuing Operations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentContinuingOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Continuing Operations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherLiabilitiesDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Liabilities Disclosure [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherLiabilitiesDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Disclosure [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherLiabilitiesDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other liabilities disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BridgeLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bridge Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BridgeLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Swing loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unrecognized employee benefit costs (including effects of foreign currency translation)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Expenditures Incurred but Not yet Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases of property, plant and equipment in accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SwedishCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Swedish Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SwedishCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Swedish Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SwedishCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Swedish credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonqualifiedPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonqualified Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonqualifiedPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nonqualified [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pension Plans Postretirement And Other Employee Benefits [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pension Plans Postretirement And Other Employee Benefits [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pension Plans, Postretirement and Other Employee Benefits [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconsolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deconsolidation charge.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconsolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation Charge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconsolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingExpenseInformationUsedByCodmDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Expense Information Used by CODM, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingExpenseInformationUsedByCodmDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment reporting, expense information used by CODM, description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyClaimsAdministrativeClosuresNumber_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Administrative closures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyClaimsAdministrativeClosuresNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Claims Administrative Closures Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyClaimsAdministrativeClosuresNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss contingency claims administrative closures number.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Raw materials</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Raw Materials, Net of Reserves</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DailySecuredOvernightFinancingRateSofrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Daily secured overnight financing rate SOFR.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DailySecuredOvernightFinancingRateSofrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Daily Secured Overnight Financing Rate SOFR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DailySecuredOvernightFinancingRateSofrMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Daily Secured Overnight Financing Rate S O F R [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement of cash flow hedges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowings or interest payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue from External Customer [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from External Customer [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PeriodForHedgedPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time period for hedged purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PeriodForHedgedPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period For Hedged Purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PeriodForHedgedPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Period covered by cash flow hedges.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Stockholders' Equity Attributable to Parent, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Stockholders' Equity Attributable to Parent, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Ampco-Pittsburgh shareholders&#8217; equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Periodic Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monthly installment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CashReceivedOnEstimatedRecovery_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash received on estimated recovery</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CashReceivedOnEstimatedRecovery_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash received on estimated recovery.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CashReceivedOnEstimatedRecovery_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GuaranteedBenefitLiabilityNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Guaranteed Benefit Liability, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GuaranteedBenefitLiabilityNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding surety bonds issued to guarantee certain pension commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDescriptionOfBusinessTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Description Of Business [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDescriptionOfBusinessTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Description Of Business [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDescriptionOfBusinessTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Description Of Business [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defined Benefit Plan Disclosure [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Disclosure [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Foreign Currency Transaction Gain (Loss), before Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gains on foreign exchange transactions included in other income net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeniorSecuredAssetBasedRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Senior Secured Asset-Based Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeniorSecuredAssetBasedRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Senior Secured Asset Based Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SeniorSecuredAssetBasedRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Senior secured asset-based revolving credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LitigationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LitigationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LitigationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for legal proceedings, legal contingencies, litigation, regulatory and other contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">United States [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Note Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss contingency accrual period increase decrease effect from lower defense to indemnity ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Accrual Period Increase Decrease Effect From Lower Defense To Indemnity Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect from lower defense to indemnity ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash investing and financing activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Investing and Financing Items [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments and Hedging Activities Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Periodic Payment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Periodic Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments of principal and interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EnvironmentalRemediationObligationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Remediation Obligations [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ReclassificationAdjustmentsForItemsIncludedInNetLossIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification adjustments for items included in net (loss) income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ReclassificationAdjustmentsForItemsIncludedInNetLossIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Adjustments For Items Included In Net Loss Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ReclassificationAdjustmentsForItemsIncludedInNetLossIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification adjustments for items included in net (loss) income:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buildings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cost of Goods and Services Sold, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of natural gas or electricity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Product and Service Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Description and Basis of Presentation [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Overview of the Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Noncurrent Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncurrentAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncurrent Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringPlanAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for warranty claims, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualPreexistingIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions By Related Party Axis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Related Party Transactions By Related Party Axis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defined Benefit Pension Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionPlansDefinedBenefitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pension Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDerivativeInstrumentsAmountRecognizedAndReclassifiedFromAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Amount Recognized as and Reclassified from Accumulated Other Comprehensive Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDerivativeInstrumentsAmountRecognizedAndReclassifiedFromAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Derivative Instruments Amount Recognized And Reclassified From Accumulated Other Comprehensive Income Loss Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDerivativeInstrumentsAmountRecognizedAndReclassifiedFromAccumulatedOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of derivative instruments amount recognized and reclassified from accumulated other comprehensive income loss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedTradeNames_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets, Trade name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedTradeNames_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Indefinite-Lived Trade Names</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant and Equipment, Gross, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Property, Plant and Equipment, Gross, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Gross, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryDistributed_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Recovery Distributed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryDistributed_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated recovery distributed.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryDistributed_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated recovery distributed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">(Loss) income before income taxes:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income before income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Before Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SettlementAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Settlement Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SettlementAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Settlement agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetAssetLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Net Asset (Liability)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetAssetLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fair Value, Net Asset (Liability), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetAssetLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value of liabilities and assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying value of investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Sponsor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanSponsorLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Sponsor Location [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDescriptionOfBusinessLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Description Of Business [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDescriptionOfBusinessLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Description Of Business [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfDescriptionOfBusinessLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Description Of Business [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyLossInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Loss in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyLossInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Guaranteed exposures of foreign banking partners</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cash Flow Hedges [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlements of Cash Flow Hedges [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price per share of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirAndLiquidProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Air and Liquid Processing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirAndLiquidProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Air And Liquid Processing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirAndLiquidProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Air and liquid processing.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AirAndLiquidProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">ALP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign currency translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerDepositsOtherPrimarilyImpactFromChangesInForeignCurrencyExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, primarily impact from changes in foreign currency exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerDepositsOtherPrimarilyImpactFromChangesInForeignCurrencyExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Deposits Other Primarily Impact From Changes In Foreign Currency Exchange Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerDepositsOtherPrimarilyImpactFromChangesInForeignCurrencyExchangeRates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer deposits, other, primarily impact from changes in foreign currency exchange rates.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument description of interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Description of Variable Rate Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cumulative Effect, Period of Adoption, Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cumulative Effect, Period of Adoption, Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency Nature</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Nature [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Natural Gas And Electricity Purchased [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Natural Gas Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NaturalGasGatheringTransportationMarketingAndProcessingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Natural Gas, Gathering, Transportation, Marketing and Processing [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency, Nature</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Nature [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive income (loss), net of income tax where applicable:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification Out of Accumulated Other Comprehensive Income (Loss) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification out of Accumulated Other Comprehensive Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsSatisfactionOfExistingContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Satisfaction of existing contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsSatisfactionOfExistingContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract Assets Satisfaction Of Existing Contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ContractAssetsSatisfactionOfExistingContracts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contract assets satisfaction of existing contracts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelDomesticMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Union electric steel domestic.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelDomesticMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Union Electric Steel Domestic Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelDomesticMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">UES Domestic [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PrepaidPensions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Pensions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PrepaidPensions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid pensions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PrepaidPensions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid pensions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveAcceleratedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Cost, Accelerated Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveAcceleratedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accelerated depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AllowanceAgainstEstimatedRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Insurance receivable - asbestos</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AllowanceAgainstEstimatedRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance Against Estimated Recoveries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AllowanceAgainstEstimatedRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance against estimated recoveries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AllowanceAgainstEstimatedRecoveries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance against estimated recoveries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateGuarantees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Corporate guarantees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateGuarantees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Corporate Guarantees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateGuarantees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding corporate guarantees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of unrecognized employee benefit costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Income Tax Effect Associated With Various Components of Other Comprehensive (Loss) Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CopperPurchasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Copper Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CopperPurchasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Copper Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CopperPurchasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Copper Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating costs and expenses:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingCostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Costs and Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Expected return on plan assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Expected Return (Loss) on Plan Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NoncurrentLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncurrent Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NoncurrentLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncurrent liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyActiveClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Total active claims at the end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyActiveClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Active Claims Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyActiveClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss contingency active claims number.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation on assets under finance leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Right-of-Use Asset, Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finite-Lived Intangible Assets, Gross, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets, gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDepositLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDepositLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Deposit Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DomesticPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S. Defined Benefit Pension Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DomesticPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Domestic Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SettlementGrossAndDefenseCostsPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Settlement Gross And Defense Costs Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SettlementGrossAndDefenseCostsPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of settlement and defense costs satisfied during the reporting period before consideration of the amount, if any, covered by existing insurance policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SettlementGrossAndDefenseCostsPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross settlement and defense costs paid in period (in 000's)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DepreciationAndAmortizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation And Amortization [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DepreciationAndAmortizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Depreciation and amortization.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DepreciationAndAmortizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and Amortization [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DepreciationAndAmortizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Depreciation and Amortization Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cumulative Effect, Period of Adoption [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChargeCreditForAsbestosRelatedCostNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Charge Credit For Asbestos Related Cost net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChargeCreditForAsbestosRelatedCostNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Charge Credit For Asbestos Related Cost net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChargeCreditForAsbestosRelatedCostNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asbestos-related costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Revenue, Net [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Benchmark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerRelatedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer-related liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerRelatedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Related Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerRelatedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer-related liabilities including liability for aggregate product warranty claims.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares authorized under Omnibus Incentive Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of business segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfContributionOfRetirementPlansTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributions for Pension and Other Postretirement Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfContributionOfRetirementPlansTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Contribution Of Retirement Plans Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfContributionOfRetirementPlansTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of contribution of retirement plans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PerformanceObligationRelatedToCustomerDepositsExpectedSatisfactionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance obligation related to customer deposits expected satisfaction period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PerformanceObligationRelatedToCustomerDepositsExpectedSatisfactionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Obligation Related To Customer Deposits Expected Satisfaction Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PerformanceObligationRelatedToCustomerDepositsExpectedSatisfactionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance obligation related to customer deposits expected satisfaction period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Corporate Nonsegment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateNonSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Corporate Costs, Including Other Income (Expense) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsGrossExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Intangible assets, gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsGrossExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets, Gross (Excluding Goodwill)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Severance costs, accelerated depreciation and other related costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restructuring charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Exit Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquipmentTermNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equipment Term Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquipmentTermNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equipment term notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recently Issued / Adopted Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits - Customer-related liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gain) loss on disposal of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationReserveNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asbestos liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationReserveNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Litigation Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Change and Ending Balances for Various Components of Accumulated Other Comprehensive Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss) [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_OwnershipAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ownership [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Capitalized Property Plant and Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNoteTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss) Note [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Depreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Depreciation at the UK facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherComprehensiveIncomeLossGrossAdjustmentsNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments for changes in:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherComprehensiveIncomeLossGrossAdjustmentsNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income Loss Gross Adjustments Net Of Tax [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_OtherComprehensiveIncomeLossGrossAdjustmentsNetOfTaxAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other comprehensive income loss gross adjustments net of tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee lease term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Term of Contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Remaining lease term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities &#8211; current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromEquipmentTermNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Equipment Term Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromEquipmentTermNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from equipment term notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromEquipmentTermNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from Equipment Term Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of prior service cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Amortization of Prior Service Cost (Credit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization of prior service credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EmployeeRetentionCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Retention Credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EmployeeRetentionCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee retention credits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EmployeeRetentionCredits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee retention credits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Customer-RelatedLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer Related Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Customer-RelatedLiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer-Related Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyPendingClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Total claims pending at the beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyPendingClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Total claims pending at the end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyPendingClaimsNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Pending Claims, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Impairment Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Asset Impairment Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetImpairmentCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash impairment charge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanTaxStatusExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Tax Status [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_WarrantsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_WarrantsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_WarrantsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Liability, Defined Benefit Plan, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liability, Defined Benefit Plan, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of unrecognized employee benefit costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock excluding excess tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentOperatingActivitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Activities [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentOperatingActivitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net (loss) income attributable to Ampco-Pittsburgh</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Purchase Commitment, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ElectricityUsageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Electricity Usage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ElectricityUsageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electricity Usage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ElectricityUsageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Electricity usage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Corporate costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Corporate costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Corporate Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CorporateCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Corporate costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balloon payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AverageFloatingInterestRates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Average Floating Interest Rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AverageFloatingInterestRates_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Average floating interest rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AverageFloatingInterestRates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest at a floating rate on tax-exempt IRB maturing in 2027/2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payment for Pension and Other Postretirement Benefits, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment for Pension and Other Postretirement Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AdministrativeClosuresClaimsPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Administrative closures claims period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AdministrativeClosuresClaimsPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrative Closures Claims Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AdministrativeClosuresClaimsPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Administrative closures claims period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Intangible assets, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets, Net (Excluding Goodwill)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line Of Credit Facility [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rent paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EntityWideRevenueNumberOfMajorCustomers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of customers who represented at least 10% of a segment's sales.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EntityWideRevenueNumberOfMajorCustomers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Wide Revenue Number Of Major Customers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EntityWideRevenueNumberOfMajorCustomers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of customers accounted for net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_InsuranceClaimSettledWithCarriers_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Settlement and defense costs paid by insurance carriers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_InsuranceClaimSettledWithCarriers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insurance Claim Settled With Carriers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_InsuranceClaimSettledWithCarriers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of asbestos-related settlement and defense costs which were paid by insurance carriers.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction in Progress [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction-in-Process [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Construction-in-Progress [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of debt principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows used in investing activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Benefits [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accounts payable to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Periodic Pension and Other Postretirement Benefit Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Net Benefit Costs [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Changes in Customer Deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccruedPayrollsAndEmployeeBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Payrolls and Employee Benefits [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccruedPayrollsAndEmployeeBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued payrolls and employee benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost and Reserve [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyClaimsSettledNumber_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Claims settled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyClaimsSettledNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, Claims Settled, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments on revolving credit facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermLinesOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Long-Term Lines of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Line of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Line of Credit, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of funds expected to be returned to the lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowed amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Asset, after Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contract assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastMillRollsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forged and Cast Mill Rolls [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastMillRollsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forged And Cast Mill Rolls [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForgedAndCastMillRollsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forged and cast mill rolls.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Interest Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Assets, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets, fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt and Lease Obligation, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Debt &#8211; current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt &#8211; current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt and Lease Obligation, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash flows used in investing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Interest Rate at Period End</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Conversion, Converted Instrument, Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of converted fixed interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments and Hedging Activities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForCreditLossesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for Credit Losses (Trade Receivables)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllowanceForCreditLossesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allowance for Credit Losses [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TermNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TermNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TermNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other noncurrent liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringPlanDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease assets gross value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Right-of-Use Asset, after Accumulated Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Property, Plant and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Outstanding standby and commercial letters of credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LettersOfCreditOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letters of Credit Outstanding, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insurance Settlements Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease, lease related accumulated depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromGovernmentGrantsUsedForPurchaseOfEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from government grants, used for purchase of equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromGovernmentGrantsUsedForPurchaseOfEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Government Grants Used for Purchase of Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromGovernmentGrantsUsedForPurchaseOfEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from government grants used for purchase of equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GB_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.K. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GB_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED KINGDOM</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, Plant and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForeignExchangeRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign exchange</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForeignExchangeRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign exchange related party debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForeignExchangeRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Foreign exchange related party debt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of cash flow hedges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee-related Liabilities, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued payrolls and employee benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee-related Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows provided by (used in) financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Purchases from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Purchases from Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtContingentPaymentOfPrincipalOrInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Contingent Payment of Principal or Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtContingentPaymentOfPrincipalOrInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit agreement modification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TriggerPeriodForStructuredInsolvency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trigger Period For Structured Insolvency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TriggerPeriodForStructuredInsolvency_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trigger period for structured insolvency.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TriggerPeriodForStructuredInsolvency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trigger period for structured insolvency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChangeInEstimatedRecovery_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in estimated recovery</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChangeInEstimatedRecovery_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in estimated recovery.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChangeInEstimatedRecovery_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in the Estimated Recovery</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TimePeriodForHedgedUsageDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time period for hedged usage description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TimePeriodForHedgedUsageDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Time Period For Hedged Usage Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TimePeriodForHedgedUsageDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Time period for hedged usage description.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2016-13 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update 2016-13 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquipmentFinancingFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment Financing Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquipmentFinancingFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equipment Financing Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EquipmentFinancingFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equipment financing facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfSubsidiariesForPurchasesOfNaturalGasUnderExistingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of subsidiaries for purchases of natural gas under existing commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfSubsidiariesForPurchasesOfNaturalGasUnderExistingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Subsidiaries For Purchases Of Natural Gas Under Existing Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfSubsidiariesForPurchasesOfNaturalGasUnderExistingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of subsidiaries for purchases of natural gas under existing commitments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained Deficit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentInterestAccrualPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest accrual period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentInterestAccrualPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Accrual Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DebtInstrumentInterestAccrualPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument interest accrual period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insurance Settlements Receivable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance receivable - asbestos</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeDescriptionOfHedgedItem_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Description of Hedged Item</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other expense - net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryByLenderUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Recovery by Lender Under Credit Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryByLenderUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated recovery by lender under credit agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedRecoveryByLenderUnderCreditAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated recovery - UES-UK (Note 2)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StoreCapitalAcquisitionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Store capital acquisitions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StoreCapitalAcquisitionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Store Capital Acquisitions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StoreCapitalAcquisitionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Store Capital Acquisitions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedAmortizationOfUnrecognizedEmployeeBenefitCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of Unrecognized Employee Benefit Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedAmortizationOfUnrecognizedEmployeeBenefitCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Amortization Of Unrecognized Employee Benefit Costs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedAmortizationOfUnrecognizedEmployeeBenefitCostsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amortization of unrecognized employee benefit costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsDeferredIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income tax assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredTaxAssetsDeferredIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets, Deferred Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Allowance Against Gross Deferred Income Tax Assets [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CommitmentsAndContingentLiabilitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingent Liabilities [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CommitmentsAndContingentLiabilitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingent Liabilities [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CommitmentsAndContingentLiabilitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments And Contingent Liabilities [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Machinery and Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MachineryAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Machinery and Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PurchasesOfNaturalGasUnderExistingCommitmentsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases of natural gas under existing commitments description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PurchasesOfNaturalGasUnderExistingCommitmentsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchases Of Natural Gas Under Existing Commitments Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PurchasesOfNaturalGasUnderExistingCommitmentsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchases of natural gas under existing commitments description.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsidiary [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SubsidiariesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiaries [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investment Income, Interest and Dividend, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment-related income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest and Dividend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Nonproduction, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Depreciation and amortization (foreign currency purchase contracts)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amount released to pre - tax earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization, Nonproduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Comprehensive Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade receivables from related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsAndOtherReceivablesNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts and Other Receivables, Net, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets, Net (Excluding Goodwill) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AociAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AociAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromInsuranceReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimbursement of prior year insurance cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromInsuranceReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Insurance Reimbursement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ProceedsFromInsuranceReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from insurance reimbursement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deposits - Other noncurrent liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Accumulated Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Insurance Settlements Receivable, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Noncurrent asbestos-related insurance receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InsuranceSettlementsReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance receivable - asbestos, less allowance for credit losses of $537 as of March 31, 2026 and December 31, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line Items Affected on Consolidated Statements of Operations for Components Reclassified from Accumulated Other Comprehensive Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForeignCurrencyPurchasesContractsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Currency Purchase Contracts [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForeignCurrencyPurchasesContractsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Purchases Contracts [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ForeignCurrencyPurchasesContractsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Foreign currency purchases contracts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total shareholders&#8217; equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated to be Reclassified in the Next 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SecuredOvernightFinancingRateSofrAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Secured overnight financing rate SOFR adjustment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SecuredOvernightFinancingRateSofrAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate SOFR Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_SecuredOvernightFinancingRateSofrAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Secured Overnight Financing Rate SOFR Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other expense - net:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfIntangibleAssetsNetExcludingGoodwillTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Changes in Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfIntangibleAssetsNetExcludingGoodwillTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Intangible Assets Net Excluding Goodwill Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfIntangibleAssetsNetExcludingGoodwillTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of intangible assets net excluding goodwill.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accrued interest payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: Comprehensive income attributable to noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs and Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating costs and expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets by Major Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite and Indefinite Lived Intangible Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite And Indefinite Lived Intangible Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_FiniteAndIndefiniteLivedIntangibleAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Finite and indefinite lived intangible assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss Contingency Accrual, Period Increase (Decrease), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Accrual, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase (decrease) to estimated asbestos liability for claims pending or projected</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Satisfaction of performance obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other income - net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other loss - net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income Loss [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss) [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconcolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deconsolidation Charge (Note 2)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconcolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deconcolidation charge.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconcolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deconsolidation charge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DeconcolidationCharge_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation Charge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Secured Overnight Financing Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">SOFR [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income tax effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Income tax provision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QualifiedPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Qualified Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Other Comprehensive Income (Loss), Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Pre-TaxTerminationGain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-tax termination gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Pre-TaxTerminationGain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-tax Termination Gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_Pre-TaxTerminationGain_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre-tax termination gain.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property, plant and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Identifiable Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Property Plant And Equipment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandAndLandImprovementsAndBuildingsAndLeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land and Land Improvements and Buildings and Leasehold Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandAndLandImprovementsAndBuildingsAndLeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Land and land improvements and buildings and leasehold improvements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other, primarily impact from changes in foreign currency exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other, primarily impact from changes in foreign currency exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualForeignCurrencyTranslationGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Standard Product Warranty Accrual, Foreign Currency Translation Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AluminumPurchasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aluminum Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AluminumPurchasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aluminum Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AluminumPurchasesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aluminum Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of actuarial loss (gain)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Amortization of Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amortization of actuarial loss (gain)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Finite And Indefinite Lived Intangible Assets Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of finite and indefinite lived intangible assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandLeaseCommencedYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land lease commenced year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandLeaseCommencedYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land Lease Commenced Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LandLeaseCommencedYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Land lease commenced year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableOtherCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable to related parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableOtherCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Other, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summarized Financial Information for Corporation's Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LandAndLandImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land and Land Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LandAndLandImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Land and Land Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossPlusOtherComprehensiveIncomeLossMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Loss Attributable to Ampco-Pittsburgh [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossPlusOtherComprehensiveIncomeLossMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income Loss Plus Other Comprehensive Income Loss [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AccumulatedOtherComprehensiveIncomeLossPlusOtherComprehensiveIncomeLossMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accumulated other comprehensive income loss plus other comprehensive income (loss).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTaxStatusAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Tax Status [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetirementPlanTaxStatusAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Tax Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChinaJointVentureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chinese Joint Venture Company [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChinaJointVentureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">China Joint Venture [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChinaJointVentureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">China Joint Venture [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net change</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other comprehensive (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive (loss) income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerRelatedLiabilitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Related Liabilities [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerRelatedLiabilitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer Related Liabilities [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CustomerRelatedLiabilitiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer-Related Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Defined Benefit Plans Disclosures [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Closure costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Exit Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassified</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Settlement of cash flow hedges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RentalProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rental Properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RentalProperties_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rental properties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UESUKMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UES UK [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UESUKMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">UES UK.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UESUKMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">UES-UK [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedCostOnUpgradingExistingEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated cost on upgrading existing equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedCostOnUpgradingExistingEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Cost On Upgrading Existing Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_EstimatedCostOnUpgradingExistingEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated cost on upgrading existing equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of Credit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Letter of Credit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerAssetAndLiabilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TaxableIndustrialRevenueBondMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Taxable industrial revenue bond.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TaxableIndustrialRevenueBondMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Taxable Industrial Revenue Bond [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_TaxableIndustrialRevenueBondMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Taxable Industrial Revenue Bond [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, plant and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property, plant and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease right-of-use assets exchanged for lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Right-of-Use Asset Obtained in Exchange for Finance Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash and cash equivalents at beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash and cash equivalents at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ClaimsClassifiedInVariousJurisdictionsAsInactiveOrTransferredToStateOrFederalJudicialPanelOnMultiDistrictLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Claims Classified In Various Jurisdictions As Inactive Or Transferred To State Or Federal Judicial Panel On Multi District Litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ClaimsClassifiedInVariousJurisdictionsAsInactiveOrTransferredToStateOrFederalJudicialPanelOnMultiDistrictLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of claims inactive or transferred to MDL panel</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ClaimsClassifiedInVariousJurisdictionsAsInactiveOrTransferredToStateOrFederalJudicialPanelOnMultiDistrictLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of inactive claims or claims classified at MDL.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained Deficit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Stock Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">UES-UK</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Union Electric Steel UK [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UnionElectricSteelUKTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Union Electric Steel UK [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtIssuanceCostsLineOfCreditArrangementsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtIssuanceCostsLineOfCreditArrangementsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs, Line of Credit Arrangements, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtIssuanceCostsLineOfCreditArrangementsGross_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt and Lease Obligation, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Long-term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtAndCapitalLeaseObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt and Lease Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncurrent operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Quoted Prices in Active Markets for Identical Inputs (Level 1) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash flows provided by (used in) financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualPayments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Satisfaction of warranty claims</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StandardProductWarrantyAccrualPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Standard Product Warranty Accrual, Decrease for Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Currency Translation [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DevelopedTechnologyRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Developed Technology [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DevelopedTechnologyRightsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Developed Technology Rights [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChangeInConsumerPriceIndexRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in consumer price index ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChangeInConsumerPriceIndexRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in consumer price index ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ChangeInConsumerPriceIndexRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in consumer price index ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDepositsFromCustomers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receipt of additional deposits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDepositsFromCustomers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Deposits from Customers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AverageSettlementAmountPerSettledClaim_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Average Settlement Amount Per Settled Claim</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AverageSettlementAmountPerSettledClaim_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The average per claim amount of settlement and defense costs satisfied during the reporting period before consideration of the amount, if any, covered by existing insurance policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_AverageSettlementAmountPerSettledClaim_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average gross settlement and defense costs per claim resolved (in 000's)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Contract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Contract [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accrual for Environmental Loss Contingencies, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Accrual for Environmental Loss Contingencies, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Accrual for Environmental Loss Contingencies, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undiscounted potential liability for all environmental compliance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccrualForEnvironmentalLossContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual for Environmental Loss Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StockOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beneficial stock ownership percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StockOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_StockOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock ownership percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UsageOfElectricityUnderExistingCommitmentsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Usage of electricity under existing commitments description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UsageOfElectricityUnderExistingCommitmentsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Usage Of Electricity Under Existing Commitments Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_UsageOfElectricityUnderExistingCommitmentsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Usage of electricity under existing commitments description.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonUsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonUsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-US [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Related Party Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from related party debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityCostRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss contingency accrual, period increase (decrease) effect from lower defense to indemnity cost ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityCostRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Accrual, Period Increase (Decrease) Effect From Lower Defense To Indemnity Cost Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityCostRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of asbestos liability from a lower defense-to-indemnity ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Periodic Payment, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfActivityRelatingToAsbestosLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Activity Relating to Asbestos Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfActivityRelatingToAsbestosLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Activity Relating To Asbestos Liability Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfActivityRelatingToAsbestosLiabilityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of activity relating to asbestos liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cumulative Effect, Period of Adoption [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncomeLossFromContinuedOperationsNetOfTaxPerBasicAndDilutedShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Loss From Continued Operations Net Of Tax Per Basic And Diluted Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncomeLossFromContinuedOperationsNetOfTaxPerBasicAndDilutedShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Income (loss) from continued operations net of tax per basic and diluted share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IncomeLossFromContinuedOperationsNetOfTaxPerBasicAndDilutedShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net (loss) income per share attributable to Ampco-Pittsburgh common shareholders:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IndustrialRevenueBondsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Industrial Revenue Bonds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IndustrialRevenueBondsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Industrial Revenue Bonds ("IRB") [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IndustrialRevenueBondsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industrial Revenue Bonds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_IndustrialRevenueBondsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Industrial revenue bonds.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ElectricityPurchasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Electricity Purchases [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ElectricityPurchasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electricity, Purchased [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Current Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_BuildingsAndLeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Buildings and Leasehold Improvements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_BuildingsAndLeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Buildings and Leasehold Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_BuildingsAndLeaseholdImprovementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buildings and Leasehold Improvements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net sales:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Term Debt, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CreditChargeForAsbestosLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">(Credit) Charge for asbestos litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CreditChargeForAsbestosLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Charge for Asbestos Litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CreditChargeForAsbestosLitigation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Credit Charge for Asbestos Litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfWarrantsOrRightsExpired_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of warrants or rights expired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfWarrantsOrRightsExpired_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of warrants or rights expired.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_NumberOfWarrantsOrRightsExpired_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants expired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unaudited Condensed Consolidated Financial Statements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfChangesInEstimatedRecoveryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Changes in Estimated Recovery [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfChangesInEstimatedRecoveryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of changes in estimated recovery.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_ScheduleOfChangesInEstimatedRecoveryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Changes in Estimated Recovery</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of exchange rate changes on cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNewClaimsFiledNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New claims served</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LossContingencyNewClaimsFiledNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency, New Claims Filed, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income (Loss) [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss) [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan, Net Periodic Benefit Cost (Credit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net benefit expense (income)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average number of common shares outstanding:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ChangeInContractWithCustomerAssetAndLiabilityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Change in Contract with Customer, Asset and Liability [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DefenseToIndemnityCostRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defense-to-indemnity cost ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DefenseToIndemnityCostRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Defense To Indemnity Cost Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_DefenseToIndemnityCostRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Defense-to-indemnity cost ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncurrentAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net sales</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Revenue from External Customer, Product and Service [Table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_PercentageOfForeignNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Foreign Net Sales</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ap_CrawfordGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Crawford Group.</link:label>
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  <xsd:element id="ap_LesseeLeasingArrangementOperatingLeaseFullyExtendedExpirationDate" name="LesseeLeasingArrangementOperatingLeaseFullyExtendedExpirationDate" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_ContractAssetsTextBlock" name="ContractAssetsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_EmployeeRetentionCredits" name="EmployeeRetentionCredits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_FiniteAndIndefiniteLivedIntangibleAssetsTable" name="FiniteAndIndefiniteLivedIntangibleAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_DebtInstrumentInterestAccrualPeriod" name="DebtInstrumentInterestAccrualPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_StockOwnershipPercentage" name="StockOwnershipPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_SummaryOfChangesInContractAssetsTableTextBlock" name="SummaryOfChangesInContractAssetsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_ClassOfWarrantOrRightExpirationDate" name="ClassOfWarrantOrRightExpirationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_PercentageOfForeignNetSales" name="PercentageOfForeignNetSales" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_CeasedBeneficiallyStockOwnershipPercentage1" name="CeasedBeneficiallyStockOwnershipPercentage1" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_ProceedsFromEquipmentFinancingFacility" name="ProceedsFromEquipmentFinancingFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_IncomeLossFromContinuedOperationsNetOfTaxPerBasicAndDilutedShareAbstract" name="IncomeLossFromContinuedOperationsNetOfTaxPerBasicAndDilutedShareAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_MesotheliomaClaimMember" name="MesotheliomaClaimMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_ProceedsFromEquipmentTermNotes" name="ProceedsFromEquipmentTermNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_AirHandlingSystemsMember" name="AirHandlingSystemsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityCostRatio" name="LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityCostRatio" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_EquipmentTermNotesMember" name="EquipmentTermNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_CashReceivedOnEstimatedRecovery" name="CashReceivedOnEstimatedRecovery" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_AlloysUnlimitedAndProcessingLLCMember" name="AlloysUnlimitedAndProcessingLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_DeconcolidationCharge" name="DeconcolidationCharge" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_NumberOfDerivativeInstrumentsHoldsForTradingPurposes" name="NumberOfDerivativeInstrumentsHoldsForTradingPurposes" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_UnauditedCondensedConsolidatedFinancialStatementsLineItems" name="UnauditedCondensedConsolidatedFinancialStatementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_HeatExchangeCoilsMember" name="HeatExchangeCoilsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_IssuanceOfCommonStockTaxBenefits" name="IssuanceOfCommonStockTaxBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_ScheduleOfContributionOfRetirementPlansTableTextBlock" name="ScheduleOfContributionOfRetirementPlansTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_NonMesotheliomaClaimsMember" name="NonMesotheliomaClaimsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_ReclassificationAdjustmentsForItemsIncludedInNetLossIncomeAbstract" name="ReclassificationAdjustmentsForItemsIncludedInNetLossIncomeAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_UnionElectricSteelUKTextBlock" name="UnionElectricSteelUKTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_EstimatedRecoveryByLenderUnderCreditAgreement" name="EstimatedRecoveryByLenderUnderCreditAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_TermNotesMember" name="TermNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_UESUKMember" name="UESUKMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_CommitmentsAndContingentLiabilitiesTable" name="CommitmentsAndContingentLiabilitiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_SeniorSecuredAssetBasedRevolvingCreditFacilityMember" name="SeniorSecuredAssetBasedRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_SettlementAgreementsMember" name="SettlementAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_CeasedDateOfBeneficialStockOwnership1" name="CeasedDateOfBeneficialStockOwnership1" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_UsageOfElectricityUnderExistingCommitmentsDescription" name="UsageOfElectricityUnderExistingCommitmentsDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_ClaimsClassifiedInVariousJurisdictionsAsInactiveOrTransferredToStateOrFederalJudicialPanelOnMultiDistrictLitigation" name="ClaimsClassifiedInVariousJurisdictionsAsInactiveOrTransferredToStateOrFederalJudicialPanelOnMultiDistrictLitigation" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_ForgedEngineeredProductsMember" name="ForgedEngineeredProductsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_CorporateGuarantees" name="CorporateGuarantees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_LandLeaseExpiryYear" name="LandLeaseExpiryYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_NumberOfIndustrialRevenueBonds" name="NumberOfIndustrialRevenueBonds" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityRatio" name="LossContingencyAccrualPeriodIncreaseDecreaseEffectFromLowerDefenseToIndemnityRatio" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_PercentageOfAnticipatedPurchasesHedged" name="PercentageOfAnticipatedPurchasesHedged" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_LitigationTextBlock" name="LitigationTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_PrepaidPensions" name="PrepaidPensions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_DebtInstrumentFixedChargeCoverageRatio" name="DebtInstrumentFixedChargeCoverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_EuropeanCreditFacilityMember" name="EuropeanCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_LandAndLandImprovementsAndBuildingsAndLeaseholdImprovementsMember" name="LandAndLandImprovementsAndBuildingsAndLeaseholdImprovementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_AUPMember" name="AUPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_EntityWideRevenueNumberOfMajorCustomers" name="EntityWideRevenueNumberOfMajorCustomers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_RevenuesFromRelatedParties" name="RevenuesFromRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_TermLoanMember" name="TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_FuturesContractsCopperAndAluminumMember" name="FuturesContractsCopperAndAluminumMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_CustomerRelatedLiabilities" name="CustomerRelatedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_NumberOfWarrantsOrRightsExpired" name="NumberOfWarrantsOrRightsExpired" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_UnionElectricSteelDomesticMember" name="UnionElectricSteelDomesticMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_LifeOfUnderlyingAsset" name="LifeOfUnderlyingAsset" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_EstimatedCostOnUpgradingExistingEquipment" name="EstimatedCostOnUpgradingExistingEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_MaximumRevolvingAdvanceAmountPercentageOfUndrawnAvailabilityOfCreditAgreement" name="MaximumRevolvingAdvanceAmountPercentageOfUndrawnAvailabilityOfCreditAgreement" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_ElectricityUsageMember" name="ElectricityUsageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_DailySecuredOvernightFinancingRateSofrMember" name="DailySecuredOvernightFinancingRateSofrMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_NumberOfSubsidiariesForUsageOfElectricityUnderExistingCommitments" name="NumberOfSubsidiariesForUsageOfElectricityUnderExistingCommitments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_LossContingencyActiveClaimsNumber" name="LossContingencyActiveClaimsNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_PerformanceObligationRelatedToCustomerDepositsExpectedSatisfactionPeriod" name="PerformanceObligationRelatedToCustomerDepositsExpectedSatisfactionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_CreditChargeForAsbestosLitigation" name="CreditChargeForAsbestosLitigation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_ForeignCurrencyPurchasesContractsMember" name="ForeignCurrencyPurchasesContractsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_TaxExemptIndustrialRevenueBondTwoMember" name="TaxExemptIndustrialRevenueBondTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_EquityRightsOfferingTextBlock" name="EquityRightsOfferingTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems" name="PensionPlansPostretirementAndOtherEmployeeBenefitsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_ATRMember" name="ATRMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_ForgedAndCastMillRollsMember" name="ForgedAndCastMillRollsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_FiniteAndIndefiniteLivedIntangibleAssetsLineItems" name="FiniteAndIndefiniteLivedIntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_Customer-RelatedLiabilitiesAbstract" name="Customer-RelatedLiabilitiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_NumberOfEmployeesInExistingBenefitPlans" name="NumberOfEmployeesInExistingBenefitPlans" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_CommitmentsAndContingentLiabilitiesLineItems" name="CommitmentsAndContingentLiabilitiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_NoncurrentLiabilityMember" name="NoncurrentLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_LossContingencySettlementAndDefenseCostsPaid" name="LossContingencySettlementAndDefenseCostsPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_TriggerPeriodForStructuredInsolvency" name="TriggerPeriodForStructuredInsolvency" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_TaxableIndustrialRevenueBondMember" name="TaxableIndustrialRevenueBondMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_InsuranceClaimSettledWithCarriers" name="InsuranceClaimSettledWithCarriers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_CopperPurchasesMember" name="CopperPurchasesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_AverageFloatingInterestRates" name="AverageFloatingInterestRates" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_AverageSettlementAmountPerSettledClaim" name="AverageSettlementAmountPerSettledClaim" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_WarrantExercisePrice" name="WarrantExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_CondensedFinancialStatementsPolicyTextBlock" name="CondensedFinancialStatementsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_AccumulatedOtherComprehensiveIncomeLossGainLossFromCashFlowHedgesEffectNetOfTax" name="AccumulatedOtherComprehensiveIncomeLossGainLossFromCashFlowHedgesEffectNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_ForeignExchangeRelatedPartyDebt" name="ForeignExchangeRelatedPartyDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_ProceedsFromGovernmentGrantsUsedForPurchaseOfEquipment" name="ProceedsFromGovernmentGrantsUsedForPurchaseOfEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsTableTextBlock" name="ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_ChargeCreditForAsbestosRelatedCostNet" name="ChargeCreditForAsbestosRelatedCostNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_Pre-TaxTerminationGain" name="Pre-TaxTerminationGain" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ap_LossContingencyClaimsAdministrativeClosuresNumber" name="LossContingencyClaimsAdministrativeClosuresNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ap_ContractAssetsOtherPrimarilyChangesInForeignCurrencyExchangeRates" name="ContractAssetsOtherPrimarilyChangesInForeignCurrencyExchangeRates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_TriggerPeriodUnderTheCreditAgreementForStructuredInsolvency" name="TriggerPeriodUnderTheCreditAgreementForStructuredInsolvency" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ap_UnionElectricSteelUKLimitedMember" name="UnionElectricSteelUKLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_OtherComprehensiveIncomeLossGrossAdjustmentsNetOfTaxAbstract" name="OtherComprehensiveIncomeLossGrossAdjustmentsNetOfTaxAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_DeconsolidationCharge" name="DeconsolidationCharge" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_UnpaidPrincipalPlusAccruedAndUnpaidInterestAndAllUnpaidFeesAndExpenses" name="UnpaidPrincipalPlusAccruedAndUnpaidInterestAndAllUnpaidFeesAndExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_ConstructionInProcessMachineryAndEquipmentOrBuildingsMember" name="ConstructionInProcessMachineryAndEquipmentOrBuildingsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_ScheduleOfDescriptionOfBusinessTable" name="ScheduleOfDescriptionOfBusinessTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_SecuredOvernightFinancingRateSofrAdjustmentMarginMember" name="SecuredOvernightFinancingRateSofrAdjustmentMarginMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_CorporateCosts" name="CorporateCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_ProceedsFromReimbursementOfPastEnergyCosts" name="ProceedsFromReimbursementOfPastEnergyCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ap_SeriesAWarrantsMember" name="SeriesAWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_STOREMember" name="STOREMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ap_ChangeInConsumerPriceIndexRatio" name="ChangeInConsumerPriceIndexRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
