Designation:A543/A543M−09(Reapproved2014)StandardSpecificationforPressureVesselPlates,AlloySteel,QuenchedandTemperedNickel-Chromium-Molybdenum1ThisstandardisissuedunderthefixeddesignationA543/A543M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecification2coversnickel-chromium-molybdenumalloysteelplatesforuseinthequenchedandtemperedcondition,intendedforthefabricationofweldedpressurevesselsandotherpressureequipment.Thesealloycompositionsarenormallyconsideredforconstructioninvolv-ingplatethicknessesof2in.[50mm]orgreater.1.2Materialunderthisspecificationisavailableintwotypes,BandC.Thematerialisalsoavailableinthreeclassesasfollows:ClassMinimumTensileStrength,ksi[MPa]1105[725]2115[795]390[620]1.3Themaximumthicknessofplatesislimitedonlybythecapacityofthechemicalcompositiontomeetthespecifiedmechanicalpropertyrequirements.1.4Theminimumplatethicknessis3⁄16in.[5mm].1.5Thesealloysteelplatesintheas-rolledconditionaresensitivetocrackingduringflamecutting,transit,andhan-dling.Theyshouldbeshippedintheas-rolledconditiononlywiththemutualagreementofthemanufacturerandthepurchaserorfabricator.1.6Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.2.ReferencedDocuments2.1ASTMStandards:3A20/A20MSpecificationforGeneralRequirementsforSteelPlatesforPressureVesselsA435/A435MSpecificationforStraight-BeamUltrasonicExaminationofSteelPlatesA577/A577MSpecificationforUltrasonicAngle-BeamEx-aminationofSteelPlatesA578/A578MSpecificationforStraight-BeamUltrasonicExaminationofRolledSteelPlatesforSpecialApplica-tions3.Gene...
