一般工业用普通要求熔模铸造的钢及合金钢熔模铸件技术规范

Designation:A957/A957M–09aStandardSpecificationforInvestmentCastings,SteelandAlloy,CommonRequirements,forGeneralIndustrialUse1ThisstandardisissuedunderthefixeddesignationA957/A957M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1ThisspecificationcoversagroupofrequirementsthataremandatoryforcastingsproducedbytheinvestmentcastingprocesstomeetthemetallurgicalrequirementsofthefollowingsteelcastingspecificationsissuedbyASTM.ASTMDesignationTitleofSpecificationA27/A27MSteelCastings,Carbon,forGeneralAp-plicationA148/A148MSteelCastings,High-Strength,forStruc-turalPurposesA297/A297MSteelCastings,Iron-ChromiumandIron-Chromium-Nickel,Heat-Resistant,forGeneralApplicationA447/A447MSteelCastings,Chromium-Nickel-IronAl-loy(25-12Class),forHigh-TemperatureServiceA494/A494MCastings,NickelandNickelAlloyA560/A560MCastings,Chromium-NickelAlloyA732/A732MCastings,Investment,CarbonandLowAlloySteelforGeneralApplication,andCobaltAlloyforHighStrengthatElevatedTemperaturesA743/A743MCastings,Iron-Chromium,Iron-Chromium-Nickel,Corrosion-Resistant,forGeneralApplicationA744/A744MCastings,Iron-Chromium-Nickel,Corro-sionResistant,forSevereServiceA747/A747MSteelCastings,Stainless,PrecipitationHardeningA890/A890MCastings,Iron-Chromium-Nickel-MolybdenumCorrosion-Resistant,Duplex(Austenitic/Ferritic)forGeneralApplica-tionA915/A915MSteelCastings,CarbonandAlloy,Chemi-calRequirementsSimilartoStandardWroughtGradesA958/A958MSteelCastings,CarbonandAlloy,withTensileRequirements,ChemicalRequire-mentsSimilartoStandardWroughtGrades1.2Thisspecificationalsocoversagroupofsupplementaryrequirementsthatmaybeappliedtotheabovespecificationsasindicatedtherein.Theseareprovidedforusewhenadditionaltestingorinspectionisdesiredandapplyonlywhenspecifiedindividuallybythepurchaserintheorder.1.3Wheninvestmentcastingsareordered,therequirementsstatedinthisspecificationformanintegralpartofthematerialspecification.Incasesofconflict,therequirementsofthisspecificationshalltakeprecedenceovertheindividualmaterialspecificationrequirements.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.2.ReferencedDocuments2.1ASTMStandards:2A27/A27MSpecificationforSteelCastings,Carbon,forGeneralApplicationA148/A148MSpecificationforSteelCastings,HighStrength,forStructuralPurposesA297/A297MSpecificationforSteelCastings,Iron-ChromiumandIron-Chromium-Nickel,HeatResistant,forGeneralApplicationA370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA380PracticeforCleaning,Descaling,andPassivationofStainlessSteelParts,Equipment,andSystemsA447/A447MSpecificationforSteelCastings,Chromium-Nickel-IronAlloy(25-12Class),forHigh-TemperatureServiceA488/A488MPracticeforSteelCastings,Welding,Quali-ficationsofProceduresandPersonnelA494/A494MSpecificationforCastings,NickelandNickelAlloyA560/A560MSpecificationforCastings,Chromium-NickelAlloyA609/A609MPracticeforCastings,Carbon,Low-Alloy,andMartensiticStainlessSteel,UltrasonicExaminationThereofA732/A732MSpecificationforCastings,Investment,Car-bonandLowAlloySteelforGeneralApplication,and1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18onCastings.CurrenteditionapprovedMay1,2009.PublishedMay2009.Originallyapprovedin1996.Lastpreviouseditionapprovedin2009asA957/A957M–09.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1*ASummaryofChangessectionappearsattheendofthisstandard.Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CobaltAlloyforHighStrengthatElevatedTemperaturesA743/A743MSpecificationforCastings,Iron-Chromium,Iron-Chromium-Nickel,CorrosionResistant,forGeneralApplicationA744/A744MSpecificationforCastings,Iron-Chromium-Nickel,CorrosionResistant,forSevereServiceA747/A747MSpecificationforSteelCastings,Stainless,PrecipitationHardeningA751TestMethods,Practices,andTerminologyforChemicalAnalysisofSteelProductsA800/A800MPracticeforSteelCasting,AusteniticAlloy,EstimatingFerriteContentThereofA890/A890MSpecificationforCastings,Iron-Chromium-Nickel-MolybdenumCorrosion-Resistant,Duplex(Austenitic/Ferritic)forGeneralApplicationA903/A903MSpecificationforSteelCastings,SurfaceAcceptanceStandards,MagneticParticleandLiquidPen-etrantInspectionA915/A915MSpecificationforSteelCastings,Carbon,andAlloy,ChemicalRequirementsSimilartoStandardWroughtGradesA941TerminologyRelatingtoSteel,StainlessSteel,Re-latedAlloys,andFerroalloysA958/A958MSpecificationforSteelCastings,CarbonandAlloy,with