ASTM-F961

Designation:F961−08StandardSpecificationfor35Cobalt-35Nickel-20Chromium-10MolybdenumAlloyForgingsforSurgicalImplants(UNSR30035)1ThisstandardisissuedunderthefixeddesignationF961;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverstherequirementsfor35cobalt-35nickel-20chromium-10molybdenumalloy(UNSR30035)intheformofforgings,usedforthemanufactureofsurgicalimplants.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.2.ReferencedDocuments2.1ASTMStandards:2A751TestMethods,Practices,andTerminologyforChemi-calAnalysisofSteelProductsE8TestMethodsforTensionTestingofMetallicMaterialsE10TestMethodforBrinellHardnessofMetallicMaterialsE18TestMethodsforRockwellHardnessofMetallicMa-terialsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE92TestMethodforVickersHardnessofMetallicMaterials(Withdrawn2010)3E112TestMethodsforDeterminingAverageGrainSizeE140HardnessConversionTablesforMetalsRelationshipAmongBrinellHardness,VickersHardness,RockwellHardness,SuperficialHardness,KnoopHardness,andScleroscopeHardnessE165PracticeforLiquidPenetrantExaminationforGeneralIndustryE354TestMethodsforChemicalAnalysisofHigh-Temperature,Electrical,Magnetic,andOtherSimilarIron,Nickel,andCobaltAlloysF562SpecificationforWrought35Cobalt-35Nickel-20Chromium-10MolybdenumAlloyforSurgicalImplantApplications(UNSR30035)F601PracticeforFluorescentPenetrantInspectionofMe-tallicSurgicalImplantsF688SpecificationforWroughtCobalt-35Nickel-20Chromium-10MolybdenumAlloyPlate,Sheet,andFoilforSurgicalImplants(UNSR30035)F981PracticeforAssessmentofCompatibilityofBiomate-rialsforSurgicalImplantswithRespecttoEffectofMaterialsonMuscleandBone2.2ISOStandards:4ISO5832-6ImplantsforSurgery–MetallicMaterials–Part6:WroughtCobalt-Nickel-Chromium-MolybdenumAlloyISO9001QualityManagementSystems—Requirements2.3AmericanSocietyforQualityControlStandard:5ASQC1SpecificationofGeneralRequirementsforaQual-ityProgram3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1lot,n—thetotalnumberofforgingsproducedfromthesameheatunderthesameconditionsatessentiallythesametime.4.OrderingInformation4.1Inquiriesandordersforforgingsunderthisspecificationshallincludethefollowinginformation:4.1.1Quantity,4.1.2ASTMdesignationanddateofissue,4.1.3Mechanicalproperties(ifapplicable,forspecialconditions),4.1.4Form,4.1.5Applicabledimensions,includingsize,thickness,width,andlength(exact,random,ormultiples),ordrawingnumber,4.1.6Condition,1ThisspecificationisunderthejurisdictionofASTMCommitteeF04onMedicalandSurgicalMaterialsandDevicesandisthedirectresponsibilityofSubcommitteeF04.12onMetallurgicalMaterialsCurrenteditionapprovedAug.1,2008.PublishedSeptember2008.Originallyapprovedin1985.Lastpreviouseditionapprovedin2003asF961–03.DOI:10.1520/F0961-08.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.3Thelastapprovedversionofthishistoricalstandardisreferencedon(ANSI),25W.43rdSt.,4thFloor,NewYork,NY10036,(ASQ),600N.PlankintonAve.,Milwaukee,WI53203,*ASummaryofChangessectionappearsattheendofthisstandardCopyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959.UnitedStates1CopyrightbyASTMInt'l(allrightsreserved);4.1.7Finish,4.1.8Specialtests(ifany),and4.1.9Otherrequirements.5.MaterialsandManufacture5.1MaterialforforgingsshallbebarsorwirefabricatedinaccordancewithSpecificationF562orSpecificationF688.Thematerialshallbegenerallyinthesolution-annealedconditionwithafinishsuitableforforging.5.2Thematerialshallbeforgedbyhammering,pressing,extruding,orupsettingandshallbeprocessed,ifpracticable,soastocausemetalflowduringthehotworkingoperationinthedirectionmostfavorableforresistingstressesencounteredinservice,asmaybeindicatedtothefabricatorbythepurchaser.5.3Forgingsshallbefreeofsplits,scale,cracks,inequalities,flaws,andotherimperfectionsnotconsistentwithgoodcommercialpractice.(SeeNote1.)Offsetormismatchallowance,dependentuponpartsizeandconfiguration,shallbewithinstandardforgingtolerances.NOTE1—CompliancetotheserequirementsmaybeverifiedbyTestMethodE165orPracticeF601orothersuitablemethod.5.4Afterallhot-workingoperationshavebeencompleted,theforgingsshallreceiveanannealingtreatmentconsistingofheatingthepartstoanappropriateelevatedtemperatureforaspecifieddwelltimefollowedbyappropriatecoolingtomeettheapplicablemetallurgicalrequirementsspecifiedherein.5.5Optionalidentificationmarks,includingthemanufactur-er’slogo,materialdesignation,heatc