A297--A297M---97-Release-2003

Designation:A297/A297M–97(Reapproved2003)StandardSpecificationforSteelCastings,Iron-ChromiumandIron-Chromium-Nickel,HeatResistant,forGeneralApplication1ThisstandardisissuedunderthefixeddesignationA297/A297M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversiron-chromiumandiron-chromium-nickelalloycastingsforheat-resistantservice.Thegradescoveredbythisspecificationaregeneralpurposealloysandnoattempthasbeenmadetoincludeheat-resistingalloysusedforspecialproductionapplication.NOTE1—Forheat-resistingalloysusedforspecialproductapplication,referenceshouldbemadetoSpecificationA351/A351M,A217/A217M,andA447/A447M.1.2Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.2.ReferencedDocuments2.1ASTMStandards:A217/A217MSpecificationforSteelCastings,MartensiticStainlessandAlloy,forPressure–ContainingParts,Suit-ableforHigh-TemperatureService2A351/A351MSpecificationforCastings,Austenitic,Aus-tenitic–Ferritic(Duplex),forPressure–ContainingParts2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProducts3A447/A447MSpecificationforSteelCastings,Chromium-Nickel-IronAlloy(25-12Class),forHigh-TemperatureService2A781/A781MSpecificationforCastings,SteelandAlloy,CommonRequirements,forGeneralIndustrialUse23.GeneralConditionsforDelivery3.1MaterialfurnishedtothisspecificationshallconformtotherequirementsofSpecificationA781/A781M,includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.Failuretocomplywiththegeneralrequire-mentsofSpecificationA781/A781Mconstitutesnonconfor-mancewiththisspecification.IncaseofconflictbetweentherequirementsofthisspecificationandSpecificationA781/A781M,thisspecificationshallprevail.4.OrderingInformation4.1Theinquiryandordershouldincludeorindicatethefollowing:4.1.1Adescriptionofthecastingbypatternnumberordrawing(dimensionaltolerancesshallbeincludedonthecastingdrawing),4.1.2Gradeofsteel,4.1.3Optionsinthespecification,and4.1.4Thesupplementaryrequirementsdesiredincludingthestandardsofacceptance.5.Process5.1Alloysshallbemadebythefollowingprocesses:electric-arc,electric-induction,orotherapprovedprocesses.6.HeatTreatment6.1Castingsforheat-resistantservicemaybeshippedintheas-castconditionwithoutheattreatment.Ifheattreatmentisrequired,thetreatmentshallbeestablishedbymutualagree-mentbetweenthemanufacturerandthepurchaserandshallbesospecifiedintheinquiry,contract,ororder.7.ChemicalComposition7.1AlloysshallconformtotherequirementsastochemicalcompositionprescribedinTable1.8.RepairbyWelding8.1Thecompositionofthedepositedweldmetalshallbesimilartothecompositionofthecasting.Allweldrepairsshallbesubjectedtothesameinspectionstandardsasthecasting.1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteel,andRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18onCastings.CurrenteditionapprovedApril10,2003.PublishedApril2003.Originallyapprovedin1946.Lastpreviouseditionapprovedin1998asA297/A297M–97(1998).2AnnualBookofASTMStandards,Vol01.02.3AnnualBookofASTMStandards,Vol01.03.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.8.2CastingswithmajorweldrepairsshallbeheattreatedinaccordancewithSection6.8.3Weldrepairsshallbeconsideredmajorwhenthedepthofthecavityafterpreparationforrepairexceeds20%oftheactualwallthickness,or1in.[25mm],whicheverissmaller,orwhentheextentofthecavityexceedsapproximately10in.2[65cm2].8.3.1WhenSupplementaryRequirementS7isspecifiedonthepurchaseorder,orinquiry,majorweldrepairsshallbesubjecttothepriorapprovalofthepurchaser.8.4Allotherweldrepairsshallbeconsideredminorandmaybemadeatthediscretionofthemanufacturerwithoutpriorapprovalofthepurchaser.SUPPLEMENTARYREQUIREMENTSThefollowingsupplementaryrequirementsshallnotapplyunlessspecifiedinthepurchaseorder.AlistofstandardizedsupplementaryrequirementsforuseattheoptionofthepurchaserisincludedinSpecificationA781/A781M.Thosewhichareordinarilyconsideredsuitableforusewiththisspecificationaregivenbelow.OthersenumeratedinA781/A781Mmaybeusedwiththisspecificationuponagreementbetweenthemanufacturerandpurchaser.S1.MagneticParticleExaminationS2.RadiographicExaminationS3.LiquidPenetrantExaminationS4.UltrasonicExaminationS5.ExaminationofWeldPreparationS6.CertificationS7.PriorApprovalofMajorWeldRepairsS8.MarkingS9.TensionTestS9.1Onetensiontestshallbemadefrommaterialrepre-sentingeachheat.Thebarfromwhichthetestspecimenistakenshallbeheattreatedinproductionfurnacestothesameprocedureasthecastingsitrepresents.TheresultsshallconformtotherequirementsspecifiedinTableS9.1.S9.2TestbarsshallbepouredinseparatelycastkeelblockssimilartoFig.3ofTes