ASTM-A148-A148M-01

Designation:A148/A148M–01AnAmericanNationalStandardStandardSpecificationforSteelCastings,HighStrength,forStructuralPurposes1ThisstandardisissuedunderthefixeddesignationA148/A148M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoverscarbonsteel,alloysteel,andmartensiticstainlesssteelcastingsthataretobesubjectedtohighermechanicalstressesthanthosecoveredinSpecificationA27/A27M.1.2Severalgradesofsteelcastingsarecovered,havingthechemicalcompositionandmechanicalpropertiesprescribedinTable1andTable2.1.3Thevaluesstatedininch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedinde-pendentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecification.2.ReferencedDocuments2.1ASTMStandards:A27/A27MSpecificationforSteelCastings,Carbon,forGeneralApplication2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProducts3A781/A781MSpecificationforCastings,SteelandAlloy,CommonRequirementsforGeneralIndustrialUse2E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications43.GeneralConditionsforDelivery3.1MaterialfurnishedtothisspecificationshallconformtotherequirementsofSpecificationA781/A781M,includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.Failuretocomplywiththegeneralrequire-mentsofSpecificationA781/A781Mconstitutesnonconfor-mancewiththisspecification.IncaseofconflictbetweentherequirementsofthisspecificationandSpecificationA781/A781M,thisspecificationshallprevail.4.OrderingInformation4.1Theinquiryandordershouldincludeorindicatethefollowing:4.1.1Adescriptionofthecastingbypatternnumberordrawing(dimensionaltolerancesshallbeincludedonthecastingdrawing),4.1.2Gradeofsteel,4.1.3Optionsinthespecification,and4.1.4Thesupplementaryrequirementsdesired,includingthestandardsofacceptance.5.HeatTreatment5.1Allcastingsshallbeheattreatedeitherbyfullannealing,normalizing,normalizingandtempering,orquenchingandtempering.Unlessotherwisespecifiedintheinquiry,contract,ororder,thecastingsmaybeheattreatedbyanyoftheseheattreatmentsorcombinationoftheseheattreatmentsattheoptionofthemanufacturer.5.2Heattreatmentshallbeperformedafterthecastingshavebeenallowedtocoolbelowthetransformationrange.6.TemperatureControl6.1Furnacetemperaturesforheat-treatingshallberegulated1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteel,andRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18onCastings.CurrenteditionapprovedMar.10,2001.PublishedMay2001.OriginallypublishedasA148–55.LastpreviouseditionA148/A148M–93b(1998).2AnnualBookofASTMStandards,Vol01.02.3AnnualBookofASTMStandards,Vol01.03.4AnnualBookofASTMStandards,Vol14.02.TABLE1ChemicalRequirementsGradeComposition,%Sulfur,maxPhospho-rus,max80-40[550-275]0.060.0580-50[550-345]0.060.0590-60[620-415]0.060.05105-85[725-585]0.060.05115-95[795-655]0.060.05130-115[895-795]0.060.05135-125[930-860]0.060.05150-135[1035-930]0.060.05160-145[1105-1000]0.060.05165-150[1140-1035]0.0200.020165-150L[1140-1035L]0.0200.020210-180[1450-1240]0.0200.020210-180L[1450-1240L]0.0200.020260-210[1795-1450]0.0200.020260-210L[1795-1450L]0.0200.0201Copyright©ASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959,UnitedStates.bytheuseofpyrometers.7.ChemicalComposition7.1Thesteelshallconformtosulfurandphosphorusre-quirementsasprescribedinTable1.7.2Thecontentofcarbon,manganese,silicon,andalloyingelementsmay,byagreement,beprescribedbythepurchaser.Ifnotspecified,thecontentmaybeselectedbythemanufacturertoobtaintherequiredmechanicalproperties.7.3Whentheanalysisofcarbon,manganese,silicon,oranyintentionallyaddedalloyingelementisspecificallyrequestedinthecontractororder,itshallbemadebythemanufacturerandreportedtothepurchaser.Theresultsoftheseanalysesshallnotbeusedasabasisforrejectionexceptbyprioragreement.8.TensileRequirements8.1OnetensiontestshallbemadefromeachheatandshallconformtothetensilerequirementsspecifiedinTable2.8.2ThetestcouponsandspecimensshallconformtorequirementsspecifiedinSection11.8.3TensiontestcouponsshallbemachinedtotheformanddimensionshowninFig.5ofTestMethodsandDefinitionsA370andtestedinaccordancewiththosetestmethods.8.4Todetermineconformancewiththetensiontestrequire-ments,anobservedvalueorcalculatedvalueshallberoundedoffinaccordancewithPracticeE29tothenearest500psi[5MPa]foryieldpointandtensilestrengthandtothenearest1%forelongationandreductionofarea.9.CharpyImpactRequirements9.1Thissectionisapplicableonlytogrades165-150L[1140-1035L],210-180L[1450-1240L],and260-210L[1795-1450L].NOTE1—Othergradesmaybeorderedtocharpyimpacttestrequire-mentsinaccordancewithSupplementaryRequirementS9ofSpecificationA781/A781M.9.2Thenotchedbarimpactpropertie