Designation:B817–08StandardSpecificationforPowderMetallurgy(PM)TitaniumAlloyStructuralComponents1ThisstandardisissuedunderthefixeddesignationB817;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverspowdermetallurgy(PM)struc-turalcomponentsfabricatedfromcommerciallypure(CP)titaniumpowdermixedwithmasteralloypowderandelemen-talpowdersinappropriatequantitytoyieldcombinedmaterialchemicalcompositionscomparabletoingotmetallurgy(I/M)alloysTitanium6A1-4VandTitanium6A1-6V-2Sn.1.2Thisspecificationcoversthefollowingmaterials:1.2.1TwotypesdependingonalloycompositionasdetailedinTable1.1.2.1.1TypeIiscomparabletoI/MTi-6A1-4V.1.2.1.2TypeIIiscomparabletoI/MTi-6A1-6V-2Sn.1.2.2Twogradesofeachtypethatresultfromthespecifictitaniumpowderusedareasfollows:1.2.2.1Grade1ismadefromspongefineswithresiduallevelsofchlorineandsodium.1.2.2.2Grade2ismadefromhydride/dehydride(HDH)orotherprocesstitaniumwithsignificantlylowerchlorineandsodiumcontent.1.2.3Twoclassesasafunctionofdensity(seeTable2)areasfollows:1.2.3.1ClassAdensityratiois94%minimum.1.2.3.2ClassBdensityratiois99%minimum.(Warning—CPtitaniumpowdermaybepyrophoric;itsusemayinvolveanexplosionhazard.)1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregivenin1.2.3.2.2.ReferencedDocuments2.1ASTMStandards:2B243TerminologyofPowderMetallurgyB311TestMethodforDensityDeterminationforPowderMetallurgy(P/M)MaterialsContainingLessThanTwoPercentPorosityB328TestMethodforDensity,OilConten...
