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SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.Copyright©2008SAEInternationalAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofSAE.TOPLACEADOCUMENTORDER:Tel:877-606-7323(insideUSAandCanada)Tel:724-776-4970(outsideUSA)Fax:724-776-0790Email:CustomerService@sae.orgSAEWEBADDRESS:(CompositionsimilartoUNSR58640)RATIONALEAMS4957DresultsfromaFiveYearReviewandupdateofthisspecification.1.SCOPE1.1FormThisspecificationcoversatitaniumalloyintheformofroundbarandwire,0.625inch(15.88mm)andunderinnominaldiameterorthickness.1.2ApplicationTheseproductshavebeenusedtypicallyforcoilspringsrequiringhightensilestrengthandcorrosionresistance,butusageisnotlimitedtosuchapplications.1.3ClassificationBarsandwireshallbeclassifiedasfollow:Type1-Straightlengths;Solutionheattreated,colddrawn,straightenedandcenterlessgroundType2-Coil;Solutionheattreatedandcolddrawn1.3.1EitherType1orType2maybesuppliedunlessaspecifictypeisordered.2.APPLICABLEDOCUMENTSTheissueofthefollowingdocumentsineffectonthedateofthepurchaseorderformsapartofthisspecificationtotheextentspecifiedherein.Thesuppliermayworktoasubsequentrevisionofadocumentunlessaspecificdocumentissueisspecified.Whenthereferenceddocumenthasbeencancelledandnosupersedingdocumenthasbeenspecified,thelastpublishedissueofthatdocumentshallapply.SAEAMS4957D-2-2.1SAEPublicationsAvailablefromSAEInternational,400CommonwealthDrive,Warrendale,PA15096-0001,Tel:877-606-7323(insideUSAandCanada)or724-776-4970(outsideUSA),:610-832-9585,(EddyCurrent)TestingofSeamlessandWeldedTubularProducts,AusteniticStainlessSteelandSimilarAlloysASTME1409DeterminationofOxygenandNitrogeninTitaniumandTitaniumAlloysbytheInertGasFusionTechniqueASTME1417LiquidPenetrantExaminationASTME1447DeterminationofHydrogeninTitaniumandTitaniumAlloysbytheInertGasFusionThermalConductivity/InfraredDetectionMethodASTME1941DeterminationofCarboninRefractoryandReactiveMetalsandTheirAlloysASTME2371AnalysisofTitaniumandTitaniumAlloysbyAtomicEmissionPlasmaSpectrometry3.TECHNICALREQUIREMENTS3.1CompositionShallconformtothepercentagesbyweightshowninTable1;carbonshallbedeterminedinaccordancewithASTME1941,hydrogeninaccordancewithASTME1447,oxygenandnitrogeninaccordancewithASTME1409,andotherelementsinaccordancewithASTME2371.Otheranalyticalmethodsmaybeusedifacceptabletothepurchaser.TABLE1-CompositionElementminmaxVanadium7.508.50Chromium5.506.50Molybdenum3.504.50Zirconium3.504.50Aluminum3.004.00Iron--0.30Oxygen--0.14Palladium(3.1.2)--0.10Carbon--0.05Nitrogen--0.03Hydrogen(3.1.1,3.1.3)--0.030(300ppm)Yttrium(3.1.4)--0.005(50ppm)OtherElements,each(3.1.4)--0.15OtherElements,total(3.1.4)--0.40Titaniumremainder3.1.1WhenASTME1447isusedforhydrogendetermination,samplesizemaybeaslargeas0.35gram.SAEAMS4957D-3-3.1.2Determinationnotrequiredunlessintentionallyadded.3.1.3Tobedeterminedonfinalproduct.3.1.4Determinationnotrequiredforroutineacceptance.3.1.5CheckAnalysisCompositionvariationsshallmeettheapplicablerequirementsofAMS2249.3.2MeltingPractice3.2.1Alloyshallbemultiplemelted.Meltingcycle(s)priortothefinalmeltingcycleshallbemadeusingvacuumconsumableelectrode,nonconsumableelectrode,electronbeamcoldhearth,orplasmaarccoldhearthmeltingpractice(s).Thefinalmeltingcycleshallbemadeundervacuumusingvacuumarcremelting(VAR)practicewithnoalloyadditionspermitted.3.2.1.1Theatmosphereformeltingcycle(s)priortothefinalmeltingcycle(s)shallbevacuumorshallbeargonand/orheliumatanabsolutepressurenothigherthan1000mmofmercury.3.2.1.2Theelectrodetipfornonconsumableelectrodemeltingshallbewater-cooledcopper.3.3ConditionProductshallbesolutiontreatedat1450to1700°F(790to925°C)holdingattheselectedtemperaturewithin±25°F(±14°C)foratimecommensuratewiththethicknessandtheheatingequipmentandprocedureused,withacoolingrateequivalenttoanaircoolorfasterandcold