Designation:F799−11StandardSpecificationforCobalt-28Chromium-6MolybdenumAlloyForgingsforSurgicalImplants(UNSR31537,R31538,R31539)1ThisstandardisissuedunderthefixeddesignationF799;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversrequirementsofcobalt-28chromium-6molybdenumalloy(UNSR31537,R31538,R31539)high-strengthforgingsforthemanufactureofsurgicalimplants.Thepropertiesspecifiedinthisdocumentspecificallyapplytofinishedorsemifinishedpartsthatreceivenosubse-quentthermomechanicalprocessing.1.2Wroughtmaterialtobeusedasforgingstockinthemanufactureofforgingsconformingtothisspecification,typicallyhotworkedandunannealedwithasurfacefinishsuitableforforging,shallbefabricatedandsuppliedinaccordancewithF1537.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.2.ReferencedDocuments2.1ASTMStandards:2E8TestMethodsforTensionTestingofMetallicMaterialsE18TestMethodsforRockwellHardnessofMetallicMa-terialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE112TestMethodsforDeterminingAverageGrainSizeE165PracticeforLiquidPenetrantExaminationforGeneralIndustryE930TestMethodsforEstimatingtheLargestGrainOb-servedinaMetallographicSection(ALAGrainSize)F75SpecificationforCobalt-28Chromium-6MolybdenumAlloyCastingsandCastingAlloyforSurgicalImplants(UNSR30075)F601PracticeforFluorescentPenetrantInspectionofMe-tallicSurgicalImplantsF981PracticeforAssessmentofCompatibilityofBiomate-rialsforSurgicalImplantswithRespecttoEffectofMaterialsonMuscleandBoneF1537SpecificationforWroughtCobalt-28Chromium-6MolybdenumAlloysf...
