Designation:A356/A356M−16StandardSpecificationforSteelCastings,Carbon,LowAlloy,andStainlessSteel,Heavy-WalledforSteamTurbines1ThisstandardisissuedunderthefixeddesignationA356/A356M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversonegradeofmartensiticstain-lesssteelandseveralgradesofferriticsteelcastingsforcylinders(shells),valvechests,throttlevalves,andotherheavy-walledcastingsforsteamturbineapplications.1.2Optionalsupplementaryrequirements(S1throughS5)shallapplyasselectedbyandspecifiedbythepurchaser.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.3.1Withinthetext,theSIunitsareshowninbrackets.2.ReferencedDocuments2.1ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA488/A488MPracticeforSteelCastings,Welding,Qualifi-cationsofProceduresandPersonnelE94GuideforRadiographicExaminationE125ReferencePhotographsforMagneticParticleIndica-tionsonFerrousCastingsE165PracticeforLiquidPenetrantExaminationforGeneralIndustryE186ReferenceRadiographsforHeavy-Walled(2to41⁄2in.(50.8to114mm))SteelCastingsE280ReferenceRadiographsforHeavy-Walled(41⁄2to12in.(114to305mm))SteelCastingsE446ReferenceRadiographsforSteelCastingsUpto2in.(50.8mm)inThicknessE709GuideforMagneticParticleTesting2.2Manufacturers’StandardizationSocietyoftheValveandFittingsIndustryStandard:3SP-55QualityStandardforSteelCastingsforValves,Flanges,Fittings,andOtherPipingComponents(VisualMethod)3.Classification3.1ThecastingsarefurnishedinthegradesshowninTable1.4.OrderingInformation4.1Ordersformaterialtothisspecificationshouldincludethefo...
