Designation:A470/A470M−05(Reapproved2015)StandardSpecificationforVacuum-TreatedCarbonandAlloySteelForgingsforTurbineRotorsandShafts1ThisstandardisissuedunderthefixeddesignationA470/A470M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversvacuum-treatedcarbonandalloysteelforgingsforturbinerotorsandshafts.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A275/A275MPracticeforMagneticParticleExaminationofSteelForgingsA293SpecificationforSteelForgings,CarbonandAlloy,forTurbineGeneratorRotorsandShafts;ReplacedbyA470(Withdrawn1984)3A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA418/A418MPracticeforUltrasonicExaminationofTur-bineandGeneratorSteelRotorForgingsA472/A472MSpecificationforHeatStabilityofSteamTur-bineShaftsandRotorForgingsA788/A788MSpecificationforSteelForgings,GeneralRe-quirementsE139TestMethodsforConductingCreep,Creep-Rupture,andStress-RuptureTestsofMetallicMaterials3.OrderingInformationandGeneralRequirements3.1MaterialsuppliedtothisspecificationshallconformtotherequirementsofSpecificationA788/A788M,whichout-linesadditionalorderinginformation,manufacturingmethodsandprocedures,marking,certification,productionanalysisvariations,andadditionalsupple...
