Designation:F1537−11StandardSpecificationforWroughtCobalt-28Chromium-6MolybdenumAlloysforSurgicalImplants(UNSR31537,UNSR31538,andUNSR31539)1ThisstandardisissuedunderthefixeddesignationF1537;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversthechemical,mechanical,andmetallurgicalrequirementsforthreewroughtcobalt-28chromium-6molybdenumalloysusedforsurgicalimplants.Thepropertiesspecifiedapplyspecificallytowroughtbar,rod,andwire.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.2.ReferencedDocuments2.1ASTMStandards:2E8/E8MTestMethodsforTensionTestingofMetallicMa-terialsE18TestMethodsforRockwellHardnessofMetallicMa-terialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE112TestMethodsforDeterminingAverageGrainSizeE354TestMethodsforChemicalAnalysisofHigh-Temperature,Electrical,Magnetic,andOtherSimilarIron,Nickel,andCobaltAlloysF75SpecificationforCobalt-28Chromium-6MolybdenumAlloyCastingsandCastingAlloyforSurgicalImplants(UNSR30075)F799SpecificationforCobalt-28Chromium-6MolybdenumAlloyForgingsforSurgicalImplants(UNSR31537,R31538,R31539)2.2AerospaceMaterialSpecifications:3AMS2248ChemicalCheckAnalysisLimits,CorrosionandHeatResistantSteelsandAlloys,MaragingandOtherHighly-AlloyedSteels,andIronAlloysAMS2269ChemicalCheckAnalysisLimits,Nickel,NickelAlloysandCobaltAlloysAMS2630Inspection,UltrasonicProductover0.5Inch(12.7mm)Thick2.3ISOStandards:4ISO5832–12ImplantsforSurgery—MetallicMaterials—Part12:WroughtCobalt-Chromium-MolybdenumAlloyISO6892MetallicMaterialsTensileTestingatAmbientTemperatureISO9001QualityManagementSystems—Requirements3.Terminology3.1DefinitionsofTerm...
