Designation:B91−17StandardSpecificationforMagnesium-AlloyForgings1ThisstandardisissuedunderthefixeddesignationB91;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1ThisspecificationcoversmagnesiumalloyforgingsdesignatedasshowninTable1.1.2Thevaluesstatedininch-poundunitsarethestandard.TheSIvaluesinparenthesesareprovidedforinformationonly.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1Thefollowingdocumentsoftheissueineffectondateofmaterialpurchaseformapartofthisspecificationtotheextentreferencedherein:2.2ASTMStandards:2B296PracticeforTemperDesignationsofMagnesiumAlloys,CastandWroughtB557TestMethodsforTensionTestingWroughtandCastAluminum-andMagnesium-AlloyProductsB660PracticesforPackaging/PackingofAluminumandMagnesiumProductsB666PracticeforIdentificationMarkingofAluminumandMagnesiumProductsB951PracticeforCodificationofUnalloyedMagnesiumandMagnesium-Alloys,CastandWroughtB953PracticeforSamplingMagnesiumandMagnesiumAlloysforSpectrochemicalAnalysisB954TestMethodforAnalysisofMagnesiumandMagne-siumAlloysbyAtomicEmissionSpectrometryE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE55PracticeforSamplingWroughtNonferrousMetalsandAlloysforDeterminationofChemicalComposition2.3FederalStandards:FED-STD-123HMarkingforShipment(CivilAgencies)32.4MilitaryStandards:MIL-STD-129MarkingforShipmentandStorage(MilitaryAgencies)32.5AerospaceMaterialsSpecification:4AMS-M-3171MagnesiumAlloy,ProcessesforPretreatmen...
