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Designation:A240/A240M–08aStandardSpecificationforChromiumandChromium-NickelStainlessSteelPlate,Sheet,andStripforPressureVesselsandforGeneralApplications1ThisstandardisissuedunderthefixeddesignationA240/A240M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thisspecification2coverschromium,chromium-nickel,andchromium-manganese-nickelstainlesssteelplate,sheet,andstripforpressurevesselsandforgeneralapplications.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisspecificationisexpressedinbothinch-poundandSIunits.However,unlesstheorderspecifiestheapplicable“M”specificationdesignation(SIunits),thematerialshallbefurnishedininch-poundunits.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA480/A480MSpecificationforGeneralRequirementsforFlat-RolledStainlessandHeat-ResistingSteelPlate,Sheet,andStripA923TestMethodsforDetectingDetrimentalIntermetallicPhaseinDuplexAustenitic/FerriticStainlessSteelsE112TestMethodsforDeterminingAverageGrainSizeE527PracticeforNumberingMetalsandAlloysintheUnifiedNumberingSystem(UNS)2.2SAEStandard:4J1086PracticeforNumberingMetalsandAlloys(UNS)3.GeneralRequirements3.1Thefollowingrequirementsforordersformaterialfurnishedunderthisspecificationshallconformtotheappli-cablerequirementsofthecurrenteditionofSpecificationA480/A480M.3.1.1Definitions;3.1.2Generalrequirementsfordelivery;3.1.3Orderinginformation;3.1.4Process;3.1.5Specialtests;3.1.6Heattreatment;3.1.7Dimensionsandpermissiblevariations;3.1.8Workmanship,finishandappearance;3.1.9Numberoftests/testmethods;3.1.10Specimenpreparation;3.1.11Retreatment;3.1.12Inspection;3.1.13Rejectionandrehearing;3.1.14Materialtestreport;3.1.15Certification;and3.1.16Packaging,marking,andloading.4.ChemicalComposition4.1ThesteelshallconformtotherequirementsastochemicalcompositionspecifiedinTable1andshallconformtoapplicablerequirementsspecifiedinSpecificationA480/A480M.5.MechanicalProperties5.1ThematerialshallconformtothemechanicalpropertiesspecifiedinTable2.1ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.17onFlat-RolledandWroughtStainlessSteel.CurrenteditionapprovedOct.15,2008.PublishedJanuary2009.Originallyapprovedin1940.Lastpreviouseditionapprovedin2008asA240/A240M–08.2ForASMEBoilerandPressureVesselCodeapplicationsseerelatedSpecifi-cationSA-240inSectionIIofthatCode.3ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.4AvailablefromSocietyofAutomotiveEngineers(SAE),400CommonwealthDr.,Warrendale,PA15096-0001,*ASummaryofChangessectionappearsattheendofthisstandard.Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.5.2Whenspecifiedbythepurchaser,CharpyimpacttestsshallbeperformedinaccordancewithSupplementaryRequire-mentS1.6.MaterialsforHigh-TemperatureService6.1TheausteniticHTypesshallconformtoanaveragegrainsizeofASTMNo.7orcoarserasmeasuredbyTestMethodsE112.6.2SupplementaryRequirementS2shallbeinvokedwhennon-HgradeausteniticstainlesssteelsareorderedforASMECodeapplicationsforserviceabove1000°F[540°C].6.3GradeS31060,unlessotherwisespecifiedinthepur-chaseorder,shallconformtoanaveragegrainsizeofASTMNo.7orcoarser,asmeasuredbyTestMethodsE112.7.Keywords7.1chromium;chromium-nickelstainlesssteel;chromium-manganese-nickelstainlesssteel;pressurevesselsA240/A240M–08a2TABLE1ChemicalCompositionRequirements,%AUNSDesignationBTypeCCarbonDManganesePhos-phorusSulfurSiliconChromiumNickelMolybdenumNitrogenCopperOtherElementsE,FAustenitic(Chromium-Nickel)(Chromium-Manganese-Nickel)N08020...0.072.000.0450.0351.0019.0–21.032.0–38.02.00–3.00...3.0–4.0Cb83Cmin,1.00maxN08367...0.0302.000.0400.0301.0020.0–22.023.5–25.56.0–7.00.18–0.250.75...N08700...0.042.000.0400.0301.0019.0–23.024.0–26.04.3–5.0...0.50Cb83Cmin0.40maxN08800800G0.101.500.0450.0151.0019.0–23.030.0–35.0......0.75FeH39.5minAl0.15–0.60Ti0.15–0.60N08810800HG0.05–0.101.500.0450.0151.0019.0–23.030.0–35.0......0.75FeH39.5minAl0.15–0.60Ti0.15–0.60N08811...0.06–0.101.500.0400.0151.0019.0–23.030.0–35.0......0.75FeH39.5minTiI0.15–0.60AlI0.15–0.60N08904904LG0.020