Designation:A203/A203M−12StandardSpecificationforPressureVesselPlates,AlloySteel,Nickel1ThisstandardisissuedunderthefixeddesignationA203/A203M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thisspecification2coversnickel-alloysteelplatesin-tendedprimarilyforweldedpressurevessels.1.2Platesunderthisspecificationareavailablewithfourstrengthlevelsandtwonickelcompositionsasfollows:GradeNominalNickelContent%YieldStrength,min,ksi[MPa]TensileStrength,min,ksi[MPa]A2.2537[255]65[450]B2.2540[275]70[485]D3.5037[255]65[450]E3.5040[275]70[485]F3.502in.[50mm]andunder55[380]80[550]ccccOver2in.[50mm]50[345]75[515]1.3Themaximumthicknessofplatesislimitedonlybythecapacityofthecompositiontomeetthespecifiedmechanicalpropertyrequirements.However,currentpracticenormallylimitsthemaximumthicknessofplatesfurnishedunderthisspecificationasfollows:GradeMaximumThickness,in.[mm]A6[150]B6[150]D4[100]E4[100]F4[100]1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents.Therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisspecifi-cation.2.ReferencedDocuments2.1ASTMStandards:3A20/A20MSpecificationforGeneralRequirementsforSteelPlatesforPressureVesselsA435/A435MSpecificationforStraight-BeamUltrasonicExaminationofSteelPlatesA577/A577MSpecificationforUltrasonicAngle-BeamEx-aminationofSteelPlatesA578/A578MSpecificationforStraight-BeamUltrasonicExaminationofRolledSteelPlatesforSpecialApplica-tions3.GeneralRequirementsandOrderingInformation3.1MaterialsuppliedtothismaterialspecificationshallconformtoA20/A20M.Theserequirementsoutlinethet...
