Designation:A743/A743M−19StandardSpecificationforCastings,Iron-Chromium,Iron-Chromium-Nickel,CorrosionResistant,forGeneralApplication1ThisstandardisissuedunderthefixeddesignationA743/A743M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoversiron-chromiumandiron-chromium-nickelalloycastingsforgeneralcorrosion-resistantapplication.Thegradescoveredbythisspecificationrepresenttypesofalloycastingssuitableforbroadrangesofapplicationwhichareintendedforawidevarietyofcorrosionenviron-ments.NOTE1—Foralloycastingsforseverecorrosion-resistantservice,referenceshouldbemadetoSpecificationA744/A744M.Forgeneralheat-resistantalloycastings,referenceshouldbemadetoSpecificationA297/A297M.Fornickelalloycastingsforcorrosion-resistantservice,referenceshouldbemadetoSpecificationA494/A494M.1.2Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.Inch-poundunitsareapplicableformaterialorderedtoSpecificationA743andSIunitsformaterialorderedtoSpecificationA743M.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2A262PracticesforDetectingSusceptibilitytoIntergranularAttackinAusteniticStainlessSteelsA297/A297MSpecificationforSteelCastings,Iron-ChromiumandIron-Chromium-Ni...
