ASTM A890 A890M

Designation:A890/A890M–12StandardSpecificationforCastings,Iron-Chromium-Nickel-MolybdenumCorrosion-Resistant,Duplex(Austenitic/Ferritic)forGeneralApplication1ThisstandardisissuedunderthefixeddesignationA890/A890M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversagroupofcastduplexstainlesssteels(austenitic/ferritic).1.2Theduplexstainlesssteelalloysofferacombinationofenhancedmechanicalpropertiesandcorrosionresistancewhenproperlybalancedincompositionandproperlyheattreated.Ferritelevelsarenotspecified,butthesealloyswilldeveloparangeofapproximately30to60%ferritewiththebalanceaustenite.Itistheresponsibilityofthepurchasertodeterminewhichgradeshallbefurnisheddependingondesignandserviceconditions,mechanicalproperties,andcorrosion-resistantcharacteristics.NOTE1—Becauseofthepossibilityofprecipitationofembrittlingphases,thegradesincludedinthisspecificationarenotrecommendedforserviceattemperaturesabove600ºF[315ºC].1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3.1Withinthetext,theSIunitsareshowninbrackets.2.ReferencedDocuments2.1ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA732/A732MSpecificationforCastings,Investment,Car-bonandLowAlloySteelforGeneralApplication,andCobaltAlloyforHighStrengthatElevatedTemperaturesA781/A781MSpecificationforCastings,SteelandAlloy,CommonRequirements,forGeneralIndustrialUseE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE562TestMethodforDeterminingVolumeFractionbySystematicManualPointCountE1245PracticeforDeterminingtheInclusionorSecond-PhaseConstituentContentofMetalsbyAutomaticImageAnalysis3.OrderingInformation3.1Ordersformaterialtothisspecificationshallincludethefollowing,asrequired,todescribethematerialadequately:3.1.1Descriptionofcastingbypatternordrawingnumber(dimensionaltoleranceshallbeincludedonthecastingdraw-ing),3.1.2Specificationdesignationandgradeincludingyearofissue,3.1.3Optionsinthespecification(See9.1),and3.1.4Supplementaryrequirementsdesired,includingthestandardsofacceptance.4.Process4.1Thesteelshallbemadebytheelectricfurnaceprocesswithorwithoutseparaterefiningsuchasargon-oxygen-decarburization(AOD).5.HeatTreatment5.1CastingsshallbeheattreatedinaccordancewiththerequirementsinTable1.NOTE2—Properheattreatmentofthesealloysisusuallynecessarytoenhancecorrosionresistanceandinsomecasestomeetmechanicalproperties.Minimumheat-treattemperaturesarespecified;however,itissometimesnecessarytoheat-treatathighertemperatures,holdforsome1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18onCastings.CurrenteditionapprovedMarch1,2012.PublishedApril2012.Originallyapprovedin1988.Lastpreviouseditionapprovedin2010asA890/A890M–10.DOI:10.1520/A0890_A0890M-12.2ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1*ASummaryofChangessectionappearsattheendofthisstandard.Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=TycoValves&Controls/5978909001,User=Tang,XiaoleiNotforResale,05/17/201223:42:30MDTNoreproductionornetworkingpermittedwithoutlicensefromIHS--``,,,``,,,``,,```,``,,`,`,`,,,-`-`,,`,,`,`,,`---minimumtimeattemperatureandthenrapidlycoolthecastingsinordertoenhancethecorrosionresistanceandmeetmechanicalproperties.6.ChemicalComposition6.1ThesteelshallconformtotherequirementsastochemicalcompositionprescribedinTable2.7.GeneralRequirements7.1MaterialfurnishedtothisspecificationshallconformtotherequirementsofSpecificationA781/A781M,includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.FailuretocomplywiththegeneralrequirementsofSpecificationA781/A781Mconstitutesnonconformancewiththisspecification.IncaseofconflictbetweentherequirementsofthisspecificationandSpecificationA781/A781M,thisspecificationshallprevail.8.RepairbyWelding8.1Thecompositionofthedepositedweldmetalmaybesimilartothatofthecastingormaybesuitablyalloyedtoachievethedesiredcorrosionresistanceandmechanicalprop-erties.8.2Weldrepairsshallbesubjecttothesamequalitystandardsasareusedtoinspectthecastings.TABLE1HeatTreatmentRequirementsGradeHeatTreatment1B,1CHeatto1900°F[1040°C]minimum,holdforsufficienttimetoheatcastinguniformlytotemperature,quenchinwaterorrapidcoolbyothermeans.2AHeatto2050°F[1120°C]minimum,holdforsufficienttimetoheatcastinguniformlytotemperature,quenchinwaterorrapidcoolbyothermeans.3AHeatto1950°F[1070°C]minimum,holdforsufficienttimetoheatcastinguniformlytotemperature,quenchinwaterorrapidcoolbyothermeans.4AHeatto2050°F[1120°C]minimumforsufficienttimetoheatcastinguniformlytotemperatureandwaterquench,orthecastingmaybefurnacecooledto1850°F[1010°C]minimum,holdfor15minminimumandthenwaterquench.Arapidcoolbyothermeansmaybeemployedinlieuofwaterquench.5AHeatto2050°F[1120°C]minimum,holdforsufficienttimetoheatcastingtotemperature,furnacecoolto1910°F[1045°C]minimum,quenchinwaterorrapidcoolbyothermeans.6AHeatto2010°F[1100°C]minimum,holdforsufficienttimetoheatcastinguniformlytotemperature,quenchinwaterorcoolrapidlybyothermeans.7AHeatto2065°F[1130°C]minimum,holdforsufficienttimetoheatcastingtotemperature,furnacecoolto1940°F[1060°C]minimum,quenchinwaterorrapidcoolbyothermeans.TABLE2ChemicalRequirementsGrade1BA1CB2AType25Cr-5Ni-M0-Cu-N25Cr-6Ni-Mo-Cu-N24Cr-10Ni-Mo-NUNSJ93372J93373J93345ACICD4MCuNCD3MCuNCE8MNComposition:Carbon,max0.040.0300.08Manganese,max1.01.201.00Silicon,max1.01.101.50Phosphorus,max0.040.0300.04Sulfur,max0.040.0300.04Chromium24.5–26.524.0-26.722.5–25.5Nickel4.7–6.05.6-6.78.0–11.0Molybdenum1.7–2.32.9-3.83.0–4.5Copper2.7–3.31.40-1.90...Tungsten.........Nitrogen0.10–0.250.22-0.330.10–0.30Grade3A4A5AB6AB7ACType25Cr-5Ni-Mo-N22Cr-5Ni-Mo-N25Cr-7Ni-Mo-N25Cr-7Ni-Mo-N27Cr-7Ni-Mo-Cu-NUNSJ93371J92205J93404J93380ACICD6MNCD3MNCE3MNCD3MWCuNComposition:Carbon,max0.060.030.030.030.030Manganese,max1.001.501.501.001.00-3.00Silicon,max1.001.001.001.001.00Phosphorus,max0.0400.040.040.0300.030Sulfur,max0.0400.0200.040.0250.020Chromium24.0–27.021.0–23.524.0–26.024.0–26.026.0–28.0Nickel4.0–6.04.5–6.56.0–8.06.5–8.56.0–8.0Molybdenum1.75–2.52.5–3.54.0–5.03.0–4.02.0–3.5Copper...1.00,max...0.5–1.01.00,maxTungsten.........0.5–1.03.0–4.0Nitrogen0.15–0.250.10–0.300.10–0.300.20–0.300.30–0.40Boron............0.0010-0.0100Barium............0.0010-0.0100Ce+La............0.005–0.030ACD4MCuhasbeenremovedfromthestandard.CD4MCuNisanacceptablesubstituteforCD4MCu.B%Cr+3.3%Mo+16%N$40.C%Cr+3.3(%Mo+0.5%W)+30%N$45.A890/A890M–122CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=TycoValves&Controls/5978909001,User=Tang,XiaoleiNotforResale,05/17/201223:42:30MDTNoreproductionornetworkingpermittedwithoutlicensefromIHS--``,,,``,,,``,,```,``,,`,`,`,,,-`-`,,`,,`,`,,`---8.3Whenpostweld/heattreatmentisbelievednecessaryforadequatecorrosionresistanceorimpactresistance,Sup-plementaryRequirementS33PostWeld/HeatTreatmentshallbeincludedinthepurchaseorder.9.ProductMarking9.1Castingsshallbemarkedformaterialidentificationwiththespecificationdesignationandgrade.Inaddition,themanu-facturer’snameoridentificationmarkandthepatternnumbershallbecastorstampedusinglow-stressstampsonallcastings.Small-sizecastingsmaybesuchthatmarkingmustbelimitedconsistentwiththeavailablearea.Themarkingofheatnumbersonindividualcastingsshallbeagreeduponbetweenthemanufacturerandthepurchaser.Markingshallbeinsuchpositionasnottoinjuretheusefulnessofthecasting.10.Keywords10.1austenite;duplexstainlesssteel;ferrite;stainlesssteel;steelcastingsSUPPLEMENTARYREQUIREMENTSThefollowingsupplementaryrequirementsshallnotapplyunlessspecifiedinthepurchaseorder.AlistofstandardizedsupplementaryrequirementsforuseattheoptionofthepurchaserisincludedinSpecificationA781/A781M.Thosethatareordinarilyconsideredsuitableforusewiththisspecifica-tionarelistedbelowbytitleonly.OthersenumeratedinSpecificationA781/A781Mmaybeusedwiththisspecificationuponagreementbetweenthemanufacturerandpurchaser.S2.RadiographicExaminationS3.LiquidPenetrantExaminationS5.ExaminationofWeldPreparationS6.CertificationS7.PriorApprovalofMajorWeldRepairsS9.CharpyImpactTestS10.HardnessTestS12.TestReportS13.UnspecifiedElementsS31.EstimatingFerriteContentS31.1Ferritecontentsshallbedeterminedbypointcount(PracticeE562),byotherquantitativemetallographicmethodssuchasimageanalysis(PracticeE1245),bymeasurementofmagneticresponse,orbyothermethodsuponagreementbetweenthemanufacturerandthepurchaser.Frequencyoftestingandlocationoftestsshallbebyagreementbetweenthemanufacturerandthepurchaser.S32.TensileRequirementsS32.1OnetensiletestshallbemadefromeachheatandshallconformtothetensilerequirementsspecifiedinTableS32.1.Testbarsshallbepouredinspecialblocksfromthesameheatasthecastingsrepresented.(SeeS32.4.)S32.2Thebarfromwhichthetestspecimenisremovedshallbeheat-treatedinproductionfurnacestothesameprocedureasthecastingsitrepresents.S32.3Testspecimensmaybecutfromheat-treatedcastings,attheproducer’soption,insteadoffromtestbars.S32.4TestcouponsmaybecastintegrallyorasseparatecastblocksinaccordancewithFigs.1and2ofSpecificationA781/A781M.TensioncouponsshallbemachinedtotheformanddimensionsofFig.4ofTestMethodsandDefinitionsA370,exceptwheninvestmentcastingsareordered.Wheninvestmentcastingsareordered,themanufacturermayprepareTABLES32.1TensileRequirementsGradeType2A24Cr-10Ni-Mo-N3A25Cr-5Ni-Mo-N4A22Cr-5Ni-Mo-NTensilestrength,ksi[MPa],min95[655]95[655]90[620]Yieldstrength(0.2%offset),ksi[MPa],min65[450]65[450]60[415]Elongationin2in.[50mm],%,minA252525GradeType5A25Cr-7Ni-Mo-N6A25Cr-7Ni-Mo-N7A27Cr-7Ni-Mo-Cu-N1B25Cr-5Ni-Mo-Cu-N1C25Cr-6Ni-Mo-Cu-NTensilestrength,ksi[MPa],min100[690]100[690]100,000[690]100[690]100[690]Yieldstrength(0.2%offset),ksi[MPa],min75[515]65[450]75,000[515]70[485]65[450]Elongationin2in.[50mm],%,minA1825201625AWhenICItestbarsareusedintensiletestingasprovidedforinthisspecification,thegagelengthtoreducedsectiondiameterratioshallbe4:1.A890/A890M–123CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=TycoValves&Controls/5978909001,User=Tang,XiaoleiNotforResale,05/17/201223:42:30MDTNoreproductionornetworkingpermittedwithoutlicensefromIHS--``,,,``,,,``,,```,``,,`,`,`,,,-`-`,,`,,`,`,,`---testspecimensinaccordancewithS3.2ofSpecificationA732/A732M.TestingshallbeinaccordancewithTestMethodsandDefinitionsA370.S32.5Ifanyspecimenshowsdefectivemachiningordevel-opsflaws,itmaybediscardedandanothersubstitutedfromthesameheat.S32.6Todetermineconformancewiththetensiontestrequirements,anobservedvalueorcalculatedvalueshallberoundedoffinaccordancewithPracticeE29tothenearest500psi[5MPa]foryieldandtensilestrengthandtothenearest1%forelongationandreductionofarea.S33.PostWeld/HeatTreatmentS33.1Castingsshallbeheat-treatedaftermajorweldre-pairs,butheattreatmentafterminorweldrepairsisnotrequiredexceptuponagreementbetweenthemanufacturerandthepurchaser.S33.2Weldrepairsshallbeconsideredmajorinthecaseofacastingthathasleakedonhydrostatictestingorwhenthedepthofthecavityafterpreparationforrepairexceeds20%oftheactualwallthickness,or1in.[25mm],whicheverissmaller,orwhentheextentofthecavityexceedsapproxi-mately10in.2[65cm2].Allotherweldrepairsshallbeconsideredminor.S33.3PostweldheattreatmentshallbeinaccordancewithTable1.S34.PriorApprovalofWeldMaterialS34.1Thepurchasermustgiveapprovalofallweldfillermaterialstobeusedpriortoanyweldrepairs.S35.HeatTreatmentofTestMaterialS35.1Testmaterialforeachheatshallbeheat-treatedwiththecastingsitrepresents.SUMMARYOFCHANGESCommitteeA01hasidentifiedthelocationofselectedchangestothisstandardsincethelastissue(A890/A890M–10)thatmayimpacttheuseofthisstandard.(ApprovedMarch1,2012.)(1)Addednotesonpurchaserresponsibilitytodeterminesuitabilityofthematerialcharacteristicsandmaximumservicetemperature.(2)AddedGrade7A.CommitteeA01hasidentifiedthelocationofselectedchangestothisstandardsincethelastissue(A890/A890M–99(2007))thatmayimpacttheuseofthisstandard.(ApprovedApril1,2010.)(1)DeletedGrade1A(CD4MCu)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).PermissionrightstophotocopythestandardmayalsobesecuredfromtheASTMwebsite(www.astm.org/COPYRIGHT/).A890/A890M–124CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=TycoValves&Controls/5978909001,User=Tang,XiaoleiNotforResale,05/17/201223:42:30MDTNoreproductionornetworkingpermittedwithoutlicensefromIHS--``,,,``,,,``,,```,``,,`,`,`,,,-`-`,,`,,`,`,,`--- Scope ReferencedDocuments OrderingInformation Process HeatTreatment ChemicalComposition GeneralRequirements RepairbyWelding TABLE1 TABLE2 ProductMarking Keywords TABLES32.1