Designation:B951−11StandardPracticeforCodificationofUnalloyedMagnesiumandMagnesium-Alloys,CastandWrought1ThisstandardisissuedunderthefixeddesignationB951;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticeprovidesasystemfordesignatingunal-loyedmagnesiumandmagnesium-alloysthathavebeenusedcommerciallysince1952,andthusisintendedtobetheregistrationsourceforunalloyedmagnesiumandmagnesium-alloys.ArecordofdesignationsalongwiththeestablishedcompositionsisgiveninTable2.1.2TheequivalentUnifiedNumberingSystem(UNS)alloydesignationsshownintheappendixesareinaccordancewithPracticeE527.2.ReferencedDocuments2.1Thefollowingdocumentsformapartofthispracticetotheextentreferencedherein:2.2ASTMStandards:2B80SpecificationforMagnesium-AlloySandCastingsB90/B90MSpecificationforMagnesium-AlloySheetandPlateB91SpecificationforMagnesium-AlloyForgingsB92/B92MSpecificationforUnalloyedMagnesiumIngotandStickForRemeltingB93/B93MSpecificationforMagnesiumAlloysinIngotFormforSandCastings,PermanentMoldCastings,andDieCastingsB94SpecificationforMagnesium-AlloyDieCastingsB107/B107MSpecificationforMagnesium-AlloyExtrudedBars,Rods,Profiles,Tubes,andWireB199SpecificationforMagnesium-AlloyPermanentMoldCastingsB403SpecificationforMagnesium-AlloyInvestmentCast-ingsB843SpecificationforMagnesiumAlloyAnodesforCa-thodicProtectionE527PracticeforNumberingMetalsandAlloysintheUnifiedNumberingSystem(UNS)3.BasisofCodification3.1Thedesignationsforalloysandunalloyedmetalsarebasedontheirchemicalcompositionlimits.NOTE1—Forunalloyedmagnesium,magnesium-alloys,castandwrought,standardlimitsforalloyingelementsandimpuritiesareex-pressedtothefollowingplaces:Lessthan0.0001%(usedonlyformagnesiumalloys)0.0000X0.0001to0.001%0.000X0.001to0.01%0.00X0.01to0.10%Unalloyedaluminummadebyarefiningprocess0.0XXAlloysan...
