Designation:F138−13aStandardSpecificationforWrought18Chromium-14Nickel-2.5MolybdenumStainlessSteelBarandWireforSurgicalImplants(UNSS31673)1ThisstandardisissuedunderthefixeddesignationF138;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thisspecificationcoversthechemical,mechanical,andmetallurgicalrequirementsforwrought18chromium-14nickel-2.5molybdenumstainlesssteelbarandwireusedforthemanufactureofsurgicalimplants.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.2.ReferencedDocuments2.1ASTMStandards:2A262PracticesforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteelsA484/A484MSpecificationforGeneralRequirementsforStainlessSteelBars,Billets,andForgingsA555/A555MSpecificationforGeneralRequirementsforStainlessSteelWireandWireRodsA751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsE8/E8MTestMethodsforTensionTestingofMetallicMa-terialsE10TestMethodforBrinellHardnessofMetallicMaterialsE18TestMethodsforRockwellHardnessofMetallicMa-terialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE45TestMethodsforDeterminingtheInclusionContentofSteelE112TestMethodsforDeterminingAverageGrainSizeE354TestMethodsforChemicalAnalysisofHigh-Temperature,Electrical,Magnetic,andOtherSimilarIron,Nickel,andCobaltAlloysE407PracticeforMicroetchingMetalsandAlloysF981PracticeforAssessmentofCompatibilityofBiomate-rialsforSurgicalImplantswithRespecttoEffectofMaterialsonMuscleandBoneF1350SpecificationforWrought18Chromium-14N...
