AMS-4938-1999

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2004SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:[phone](insideUSAandCanada)Tel:[phone](outsideUSA)Fax:[phone]Email:[e-mail]::Short-TransverseTensile,FractureToughness,andLongitudinalTime-Dependent-Tension1.SCOPE:1.1Form:Thisspecificationestablishesrequirementsfortitaniumforgingsofanyshapeorformfromwhichfinishedpartsaretobemade.(See8.2,8.4.4,8.6,and8.7).1.2Application:Theseforgingsareusedtypicallyinthemanufactureofhigh-performancepartswhencontrolofshort-transversetensile,fracturetoughness,tensilecreep,ortensileruptureisrequired,butusageisnotlimitedtosuchapplications.1.2.1Theseforgingsaretobemanufacturedinaccordancewithadocumentedprocess;productapprovalisbasedonfirst-articledemonstrationsofmechanicalandmicrostructuralpropertiesintheheat-treatconditionandsectionsizeofthefinishedpart.1.2.2Certaindesignandprocessingproceduresmaycausesomeoftheseproductstobecomesusceptibletostress-corrosioncrackingafterheattreatment;ARP982recommendspracticestominimizesuchconditions.1.3Classification:ForgingsshallbeofthefollowingGradesasspecifiedintheorderingdata.(See8.3).WhennoGradeisspecified,GradeAshallapply.1.3.1GradeA:Acceptancetestsincludeverificationofroom-temperaturetensilepropertiesand,whenapplicable,ofroom-temperaturefracturetoughness.Preproductiontestingincludesverificationofallapplicablerequirements.AEROSPACEMATERIALSPECIFICATIONAMS4938IssuedJAN1999ReaffirmedDEC2004Author:Gilligan-SID:12756-GUID:19170008-141.217.1.16AMS4938SAEAMS4938-2-1.3.2GradeB:Acceptancetestsdonotincludeverificationofmechanicalproperties.Preproductiontestingincludesverificationofallapplicablerequirements.2.APPLICABLEDOCUMENTS:Thefollowingpublicationsformapartofthisspecificationtotheextentspecifiedherein.ThelatestissueofSAEpublicationsshallapply.Theapplicableissueofotherpublicationsshallbetheissueineffectonthedateofthepurchaseorder.2.1SAEPublications:AvailablefromSAE,400CommonwealthDrive,Warrendale,PA15096-0001.AMS2380ApprovalandControlofPremium-QualityTitaniumAlloysAMS2643StructuralExaminationofTitaniumAlloysAMS2801HeatTreatment,TitaniumAlloyPartsAMS2808Identification,ForgingsARP982MinimizingStress-CorrosionCrackinginWroughtTitaniumProducts2.2ASTMPublications:AvailablefromASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959.ASTME8TensionTestingofMetallicMaterialsASTME8MTensionTestingofMetallicMaterials(Metric)ASTME21ElevatedTemperatureTensionTestsofMetallicMaterialsASTME139ConductingCreep,Creep-rupture,andStress-ruptureTestsofMetallicMaterialsASTME292ConductingTime-for-ruptureNotchTensionTestsofMaterialsASTME399Plane-StrainFractureToughnessofMetallicMaterialsASTME1304Plane-Strain(Chevron-Notch)FractureToughnessofMetallicMaterialsASTME1447HydrogenAnalysis2.3U.S.GovernmentPublications:AvailablefromDODSSP,SubscriptionServicesDesk,Building4D,700RobbinsAvenue,Philadelphia,PA19111-5094.MIL-H-82100HeatTreatmentofTitaniumandTitaniumAlloysMIL-STD-129MarkingforShipmentandStorage3.TECHNICALREQUIREMENTS:3.1Material:Forgingsshallbeproducedfromforgingstockthatconformstothematerialspecificationspecifiedbythepurchaser.(See8.3andAnnexA).Author:Gilligan-SID:12756-GUID:19170008-141.217.1.16AMS4938SAEAMS4938-3-3.2Condition:3.2.1Physical:Forgingsshallnotbewelded,shallhaveacceptancetesttabs,andshallbesupplieddescaledandetched(3.5.1),withallacceptance-testtabsandtest-materialprolongationsnotconsumedinpredeliverytestinginplace.(See8.4and8.5).3.2.2As-SuppliedHeat-TreatCondition:Forgingsshallbesuppliedintheheat-treatconditionspecifiedbythematerialspecification(3.1)unlessotherwisespecifiedonthedrawing.(See8.1and8.3).3.3Properties:Testspecimens,exceptingthoseformacrostructure(3.3.2.2),shallconformto4.3.4and4.3.5.3.3.1MechanicalProperties:Mechanicalpropertiesshallconformtotherequirementsoftheforging-stockmaterialspecification(3.1);ifnosuchrequirementexists,thesepropertiesshallbeasspecifiedbythepurchaser.(See8.1).Room-temperaturetensilerequirements(3.3.1.1.1)shallbeapplicablealways;othermechanicalpropertiesshallbeapplicableonlywhensospecifiedbythepurchaser.(See8.1).3.3.1.1Tensile:Theshort-transversetestdirectionshallbeapplicablewhenSfinalHT11/2inches(38.1mm);seeFigure1fordefinitionofSfinalHT.ThelongitudinaltestdirectionshallbeapplicablewhenSfinalHT11/2inches(38.1mm).(See8.4.1).3.3.1.1.1Room-Temperature:Room-temperaturetens