Designation:B331−16StandardTestMethodforCompressibilityofMetalPowdersinUniaxialCompaction1ThisstandardisissuedunderthefixeddesignationB331;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thislaboratorytestmethodcoversthedeterminationofthecompressibilityofmetalpowdersandmetalpowdermix-turesasmeasuredbytheextenttowhichatestportioncanbedensifiedundercontrolledconditionsinaspecifieddie.1.2Withtheexceptionofthevaluesfordensityandmass,forwhichtheuseofgrampercubiccentermetre(g/cm3)andgram(g)unitsisthelongstandingindustrypractice,thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2B215PracticesforSamplingMetalPowdersB243TerminologyofPowderMetallurgyB925PracticesforProductionandPreparationofPowderMetallurgy(PM)TestSpecimensB962TestMethodsforDensityofCompactedorSinteredPowderMetallurgy(PM)ProductsUsingArchimedes’PrincipleE456TerminologyRelatingtoQualityandStatistics3.Terminology3.1Definitions—FordefinitionsoftermsusedinthistestmethodrefertoTerminologyB243.AdditionaldescriptivePMinformationisavailableintheRelatedMaterialsectionofVol02.05oftheAnnualBookofASTMStandards.4.SummaryofTestMethod4.1Atestportionofmetalpowderisuniaxiallycompressedinaspecificdieundercontrolledconditions.4.2Thegreendensityoftheresultingcompactisdeter-mined.4.3Thecompressibilityofthepowderisdefinedasthegreendensityofthetestcompactatthecompactingpressurethatwasused.5.SignificanceandU...
