Designation:A579/A579M−17StandardSpecificationforSuperstrengthAlloySteelForgings1ThisstandardisissuedunderthefixeddesignationA579/A579M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversrequirementsforforgedsteelshapesforhighlystressedstructuralmembersrequiringyieldstrengthsinexcessof140ksi[965MPa].1.2Thisspecificationisnotintendedforapplicationslim-itedbycreepdeformation.1.3Twenty-eightgradesarecoveredbythisspecification.Selectionwilldependupondesign,serviceconditions,andmechanicalpropertiesrequired.1.4Supplementaryrequirementsareprovidedforusewhenadditionaltestingorinspectionisdesired.Theseshallapplyonlywhenspecifiedindividuallybythepurchaserintheorder.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.6Unlesstheorderspecifiestheapplicable“M”specifica-tiondesignation,thematerialshallbefurnishedtotheinch-poundunits.2.ReferencedDocuments2.1ASTMStandards:2A255TestMethodsforDeterminingHardenabilityofSteelA275/A275MPracticeforMagneticParticleExaminationofSteelForgingsA370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA388/A388MPracticeforUltrasonicExaminationofSteelForgingsA788/A788MSpecificationforSteelForgings,GeneralRe-quirementsE3GuideforPreparationofMetallographicSpecimensE21TestMethodsforElevatedTemperatureTensionTestsofMetallicMaterialsE45TestMethodsforDeterminingtheInclusionContentofSteelE112TestMethodsforDeterminingAverageGrainSizeE165/E165MPracticeforLiquidPenetrantExaminationforGeneralIndustry3.OrderingInformationandGeneralRequirements3.1InadditiontotheorderinginformationrequiredbySpecific...
