ANSI-A351-2016

Designation:A351/A351M−16StandardSpecificationforCastings,Austenitic,forPressure-ContainingParts1ThisstandardisissuedunderthefixeddesignationA351/A351M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecification2coversausteniticsteelcastingsforvalves,flanges,fittings,andotherpressure-containingparts(Note1).NOTE1—Carbonsteelcastingsforpressure-containingpartsarecov-eredbySpecificationA216/A216M,low-alloysteelcastingsbySpecifi-cationA217/A217M,andduplexstainlesssteelcastingsbySpecificationA995/A995M.1.2Anumberofgradesofausteniticsteelcastingsareincludedinthisspecification.Sincethesegradespossessvaryingdegreesofsuitabilityforserviceathightemperaturesorincorrosiveenvironments,itistheresponsibilityofthepurchasertodeterminewhichgradeshallbefurnished.Selec-tionwilldependondesignandserviceconditions,mechanicalproperties,andhigh-temperatureorcorrosion-resistantcharacteristics,orboth.1.2.1Becauseofthermalinstability,GradesCE20N,CF3A,CF3MA,andCF8Aarenotrecommendedforserviceattemperaturesabove800°F[425°C].1.3Supplementaryrequirementsofanoptionalnatureareprovidedforuseattheoptionofthepurchaser.TheSupple-mentaryrequirementsshallapplyonlywhenspecifiedindi-viduallybythepurchaserinthepurchaseorderorcontract.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4.1Thisspecificationisexpressedinbothinch-poundunitsandinSIunits;however,unlessthepurchaseorderorcontractspecifiestheapplicableMspecificationdesignation(SIunits),theinch-poundunitsshallapply.Withinthetext,theSIunitsareshowninbracketsorparentheses.2.ReferencedDocuments2.1ASTMStandards:3A216/A216MSpecificationforSteelCastings,Carbon,Suit-ableforFusionWelding,forHigh-TemperatureServiceA217/A217MSpecificationforSteelCastings,MartensiticStainlessandAlloy,forPressure-ContainingParts,Suit-ableforHigh-TemperatureServiceA488/A488MPracticeforSteelCastings,Welding,Qualifi-cationsofProceduresandPersonnelA703/A703MSpecificationforSteelCastings,GeneralRequirements,forPressure-ContainingPartsA985/A985MSpecificationforSteelInvestmentCastingsGeneralRequirements,forPressure-ContainingPartsA995/A995MSpecificationforCastings,Austenitic-Ferritic(Duplex)StainlessSteel,forPressure-ContainingParts2.2ManufacturersStandardizationSocietyoftheValveandFittingsIndustryStandard:4SP-55QualityStandardforSteelCastingsforValves,Flanges,andFittingsandOtherComponents(VisualMethod)3.GeneralConditionsforDelivery3.1Otherthaninvestmentcastings–MaterialfurnishedtothisspecificationshallconformtotherequirementsofSpeci-ficationA703/A703M,includinganysupplementaryrequire-mentsthatareindicatedinthepurchaseorder.FailuretocomplywiththegeneralrequirementsofSpecificationA703/A703Mconstitutesnonconformancewiththisspecification.IncaseofconflictbetweentherequirementsofthisspecificationandSpecificationA703/A703M,thisspecificationshallpre-vail.3.2InvestmentCastings–Materialfurnishedtothisspeci-ficationshallconformtotherequirementsofSpecificationA985/A985M,includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.Failuretocomplywiththe1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18onCastings.CurrenteditionapprovedMay1,2016.PublishedMay2016.Originallyapprovedin1952.Lastpreviouseditionapprovedin2015asA351/A351M–15.DOI:10.1520/A0351_A0351M-16.2ForASMEBoilerandPressureVesselCodeapplications,seerelatedSpecifi-cationSA-351/SA-351MinSectionIIofthatcode.3ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.4AvailablefromManufacturersStandardizationSocietyoftheValveandFittingsIndustry(MSS),127ParkSt.,NE,Vienna,VA22180-4602,http://www.mss-hq.com.*ASummaryofChangessectionappearsattheendofthisstandardCopyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959.UnitedStates1generalrequirementsofSpecificationA985/A985Mconsti-tutesnonconformancewiththisspecification.Incaseofcon-flictbetweentherequirementsofthisspecificationandSpeci-ficationA985/A985M,SpecificationA985/A985Mshallprevail.3.3ThepostweldheattreatmentrequirementsofSupple-mentaryRequirementS11maybespecifiedwhenausteniticcastingsotherthanHK,HT,orCT15Caretobesubjectedtoseverecorrosiveservice.4.OrderingInformation4.1Theinquiryandordershouldincludeorindicatethefollowing:4.1.1Adescriptionofthecastingbypatternnumberordrawing(dimensionaltolerancesshallbeincludedonthecastingdrawing),4.1.2Gradeofsteel,4.1.3Optionsinthespecification,and4.1.4Supplementaryrequirementsdesired,includingthestandardsofacceptance.5.Process5.1Thesteelshallbemadebytheelectricfurnaceprocesswithorwithoutseparaterefiningsuchasargon-oxygendecar-burization(AOD).6.HeatTreatment6.1Allcastingsshallreceiveaheattreatmentatthetem-peraturespecifiedinTable1,followedbyaquenchinwaterorrapidcoolbyothermeansexceptasnoted.NOTE2—Properheattreatmentofthesealloysisusuallynecessarytoenhancecorrosionresistanceandinsomecasestomeetmechanicalproperties.Minimumheat-treattemperaturesarespecified;however,itissometimesnecessarytoheat-treatathighertemperatures,holdforsomeminimumtimeattemperature,andthenrapidlycoolthecastingsinordertoenhancethecorrosionresistanceandmeetmechanicalproperties.7.ChemicalComposition7.1ThesteelshallconformtotherequirementsastochemicalcompositionprescribedinTable2.8.TensileProperties8.1Steelusedforthecastingsshallconformtotherequire-mentsastotensilepropertiesprescribedinTable3.9.Quality9.1Thesurfaceofthecastingshallbeexaminedvisuallyandshallbefreeofadheringsand,scale,cracks,andhottears.Othersurfacediscontinuitiesshallmeetthevisualacceptancestandardsspecifiedintheorder.VisualMethodSP-55orothervisualstandardsmaybeusedtodefineacceptablesurfacediscontinuitiesandfinish.Unacceptablevisualsurfacediscon-tinuitiesshallberemovedandtheirremovalverifiedbyvisualexaminationoftheresultantcavities.9.2Whenadditionalinspectionisdesired,SupplementaryRequirementsS5,S6,andS10maybeordered.9.3Thecastingsshallnotbepeened,plugged,orimpreg-natedtostopleaks.10.RepairbyWelding10.1RepairsshallbemadeusingproceduresandweldersqualifiedunderPracticeA488/A488M.10.2Weldrepairsshallbeinspectedtothesamequalitystandardsthatareusedtoinspectthecastings.WhencastingsareproducedwithSupplementaryRequirementS5specified,weldrepairsoncastingsthathaveleakedonhydrostatictest,oroncastingsinwhichthedepthofanycavitypreparedforrepairweldingexceeds20%ofthewallthicknessor1in.[25mm],whicheverissmaller,oroncastingsinwhichanycavitypreparedforweldingisgreaterthanapproximately10in.2[65cm2],shallberadiographedtothesamestandardsthatareusedtoinspectthecastings.WhencastingsareproducedwithSupplementaryRequirementS6specified,weldrepairsshallbeinspectedbyliquidpenetrantexaminationtothesamestan-dardsthatareusedtoinspectthecastings.10.3ForGradeHG10MnN,thefillermetaltobeusedshallbeestablishedbymutualagreementbetweenthemanufacturerandthepurchaser.NOTE3—Whenausteniticsteelcastingsaretobeusedinserviceswheretheywillbesubjecttostresscorrosion,thepurchasershouldsoindicateinhisorderandsuchcastingsshouldbesolution-heattreatedfollowingallweldrepairs.11.Keywords11.1austeniticstainlesssteel;pressurecontainingparts;stainlesssteel;steelcastingsTABLE1Heat-TreatmentRequirementsGradeTemperature,min°F°CHK30,HK40,HT30,CT15C,HG10MnNas-castas-castCF3,CF3A,CF8,CF8A,CF3M,CF3MA,CF8M,CF3MN,CG3M,CF10,CF10M,CG8M19001040CF10SMnN,CF8C,CF10MC19501065CN7M,CG6MMnN20501120CH8,CH10,CH20,CK2021001150CK3MCuN,CN3MNB22001200CE20NA22251220AGradeshallbequenchedinwaterorthecastingsmaybefurnacecooledto2050°F[1120°C]minimum,heldfor15minminimumandthenquenchedinwaterorrapidlycooledbyothermeans.BCastingsofthesegradesshallbeheldatthespecifiedtemperatureforaminimumof4hours.A351/A351M−162TABLE2ChemicalRequirementsNOTE1—CE8MNandCD3MWCuNhavebeendeletedfromthisspecificationandaddedtoSpecificationA995/A995MasGrades2Aand6Arespectively.CD4MCuhasalsobeenremoved.SpecificationA995/A995MGrade1B,CD4MCuN,isanacceptablesubstituteElement,%(max,exceptwhererangeisgiven)MaterialGradeCarbonManganeseSiliconSulfurPhosphorusChromiumNickelMolybdenumColumbium(Niobium)DVanadiumNitrogenCopperCE20NJ928020.201.501.500.0400.04023.0–26.08.0–11.00.50......0.08–0.20...CF3,CF3AJ927000.031.502.000.0400.04017.0–21.08.0–12.00.50............CF8,CF8AJ926000.081.502.000.0400.04018.0–21.08.0–11.00.50............CF3M,CF3MAJ928000.031.501.500.0400.04017.0–21.09.0–13.02.0–3.0............CF8MJ929000.081.501.500.0400.04018.0–21.09.0–12.02.0–3.0............CF3MNJ928040.031.501.500.0400.04017.0–21.09.0–13.02.0–3.0......0.10–0.20...CF8CJ927100.081.502.000.0400.04018.0–21.09.0–12.00.50A.........CF10J929500.04–0.101.502.000.0400.04018.0–21.08.0–11.00.50............CF10MJ929010.04–0.101.501.500.0400.04018.0–21.09.0–12.02.0–3.0............CF10MC0.101.501.500.0400.04015.0–18.013.0–16.01.75–2.25B.........CF10SMnNJ929720.107.00–9.003.50–4.500.0300.06016.0–18.08.0–9.0.........0.08–0.18...CG3MJ929990.031.501.500.040.0418.0–21.09.0–13.03.0–4.0............CG6MMnNJ937900.064.0–6.01.000.0300.04020.5–23.511.5–13.51.50–3.000.10–0.300.10–0.300.20–0.40...CG8MJ930000.081.501.500.040.0418.0–21.09.0–13.03.0–4.0............CH8J934000.081.501.500.0400.04022.0–26.012.0–15.00.50............CH10J934010.04–0.101.502.000.0400.04022.0–26.012.0–15.00.50............CH20J934020.04–0.201.502.000.0400.04022.0–26.012.0–15.00.50............A351/A351M−163TABLE2ContinuedElement,%(max,exceptwhererangeisgiven)MaterialGradeCarbonManganeseSiliconSulfurPhosphorusChromiumNickelMolybdenumColumbium(Niobium)DVanadiumNitrogenCopperCK20J942020.04–0.201.501.750.0400.04023.0–27.019.0–22.00.50............CK3MCuNJ932540.0251.201.000.0100.04519.5–20.517.5–19.56.0–7.0......0.18–0.240.50–1.00CN3MNJ946510.032.001.000.0100.04020.0–22.023.5–25.56.0–7.0......0.18–0.260.75CN7MN080070.071.501.500.0400.04019.0–22.027.5–30.52.0–3.0.........3.0–4.0CT15CN081510.05–0.150.15–1.500.50–1.500.030.0319.0–21.031.0–34.0...0.50–1.50.........HG10MnNJ926040.07–0.113.0–5.00.700.0300.04018.5–20.511.5–13.50.25–0.45C...0.20–0.300.50HK30J942030.25–0.351.501.750.0400.04023.0–27.019.0–22.00.50............HK40J942040.35–0.451.501.750.0400.04023.0–27.019.0–22.00.50............HT30N080300.25–0.352.002.500.0400.04013.0–17.033.0–37.00.50............AGradeCF8Cshallhaveacolumbium(niobium)contentofnotlessthan8timesthecarboncontentbutnotover1.00%.BGradeCF10MCshallhaveacolumbium(niobium)contentofnotlessthan10timesthecarboncontentbutnotover1.20%.CGradeHG10MnNshallhaveacolumbium(niobium)contentofnotlessthan8timesthecarbon,butnotover1.00%.DColumbium(Cb)andniobium(Nb)arealternatenamesforElement41.A351/A351M−164TABLE3TensileRequirementsMaterialGradeTensilestrength,min,ksi[MPa]Yieldstrength,Amin,ksi[MPa]Elongationin2in.or50mm,Bmin,%CE20N804030J92802[550][275]CF3703035J92700[485][205]CF3A773535J92700[530][240]CF8703035J92600[485][205]CF8A773535J92600[530][240]CF3M703030J92800[485][205]CF3MA803730J92800[550][255]CF8M703030J92900[485][205]CF3MN753735J92804[515][255]CF8C703030J92710[485][205]CF10703035J92950[485][205]CF10M703030J92901[485][205]CF10MC703020[485][205]CF10SMnN8542.530J92972[585][295]CG3M753525J92999[515][240]CG6MMnN8542.530J93790[585][295]CG8M753525J93000[515][240]CH8652830J93400[450][195]CH10703030J93401[485][205]CH20703030J93402[485][205]CK20652830J94202[450][195]CK3MCuN803835J93254[550][260]CN3MN803835J94651[550][260]CN7M622535N08007[425][170]CT15C632520N08151[435][170]A351/A351M−165SUPPLEMENTARYREQUIREMENTSThefollowingsupplementaryrequirementsshallnotapplyunlessspecifiedinthepurchaseorder.AlistofstandardizedsupplementaryrequirementsforuseattheoptionofthepurchaserisincludedinSpecificationsA703/A703MandA985/A985M.Thosewhichareordinarilyconsideredsuitableforusewiththisspecificationaregivenbelow.OthersenumeratedinSpecificationsA703/A703MandA985/A985Mmaybeusedwiththisspecificationuponagreementbetweenthemanufacturerandpurchaser.S2.DestructionTestsS5.RadiographicInspectionS6.LiquidPenetrantInspectionS10.ExaminationofWeldPreparationS11.PostWeldHeatTreatmentS11.1Allausteniticcastings,exceptGradesHK,HT,andCT15C,whichhavebeensubjectedtoweldrepairs,shallbegivenapost-weldsolutionheattreatment.S11.2Thepost-weldtreatmentforgradesCK3MCuNandCN3MNshallbeasspecifiedinTable3exceptthattheminimumsoaktimeforcastingsthathavealreadybeenheattreatedaccordingtoTable3maybe1hour.S33.StabilizationHeatTreatmentofCF8CS33.1CF8Cshallbestabilizedat1600-1650°F(870-900°C)foraminimumtimeof1h/in.(25mm)ofthicknessandwaterquenchedorrapidlycooledbyothermeans.Thegradedesignationsymbolshallbefollowedbythesymbol“S33.”S34.StabilizationHeatTreatmentofCF10MCS34.1CF10MCshallbestabilizedat1600-1650°F(870-900°C)foraminimumtimeof1h/in.(25mm)ofthicknessandwaterquenchedorrapidlycooledbyothermeans.Thegradedesignationsymbolshallbefollowedbythesymbol“S34.”TABLE3ContinuedMaterialGradeTensilestrength,min,ksi[MPa]Yieldstrength,Amin,ksi[MPa]Elongationin2in.or50mm,Bmin,%HG10MnN763320J92604[525][225]HK30653510J94203[450][240]HK40623510J94204[425][240]HT30652815N08030[450][195]ADeterminebythe0.2%offsetmethod.BWhenICItestbarsareusedintensiletestingasprovidedforinSpecificationA995/A995M,thegaugelengthtoreducedsectiondiameterratioshallbe4to1.A351/A351M−166SUMMARYOFCHANGESCommitteeSteel,StainlessSteelandRelatedAlloyshasidentifiedthelocationofselectedchangestothisstandardsincethelastissue(A351/A351M–15)thatmayimpacttheuseofthisstandard.(ApprovedMay1,2016.)(1)UpdategradedesignationsforHG10MNNandCG6MMNtocomplywithparagraphX1.2.4inSpecificationA703/A703M.(2)ReformatTable2andTable3.CommitteeA01hasidentifiedthelocationofselectedchangestothisstandardsincethelastissue(A351/A351M–14)thatmayimpacttheuseofthisstandard.(ApprovedSept.1,2015)(1)ChangethesignificantfiguresforCG6MMNMn,CrandNiinTable2.(2)ChangeelongationsignificantfiguresinTable3.ASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.YourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommittee,whichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStandards,attheaddressshownbelow.ThisstandardiscopyrightedbyASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.Individualreprints(singleormultiplecopies)ofthisstandardmaybeobtainedbycontactingASTMattheaboveaddressorat610-832-9585(phone),610-832-9555(fax),orservice@astm.org(e-mail);orthroughtheASTMwebsite(www.astm.org).PermissionrightstophotocopythestandardmayalsobesecuredfromtheCopyrightClearanceCenter,222RosewoodDrive,Danvers,MA01923,Tel:(978)646-2600;http://www.copyright.com/A351/A351M−167