Designation:D2596−20StandardTestMethodforMeasurementofExtreme-PressurePropertiesofLubricatingGrease(Four-BallMethod)1ThisstandardisissuedunderthefixeddesignationD2596;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thistestmethodcoversthedeterminationoftheload-carryingpropertiesoflubricatinggreases.Threedetermina-tionsaremade:1.1.1Load-WearIndex(formerlycalledMean-HertzLoad),1.1.2WeldPoint,bymeansoftheFour-BallExtreme-Pressure(EP)Tester,and1.1.3Lastnonseizureload(LNSL).1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D2509TestMethodforMeasurementofLoad-CarryingCapacityofLubricatingGrease(TimkenMethod)G40TerminologyRelatingtoWearandErosion2.2AmericanNationalStandard:3B3.12MetalBalls3.Terminology3.1Definitions:3.1.1compensationline,n—alineofplotonlog-logpaperwherethecoordinatesarescardiameterinmillimetresandappliedloadinkilograms-force(orNewtons)obtainedunderdynamicconditions.3.1.1.1Discussion—ShowninFig.1aslineABE.3.1.2compensationscardiameter—theaveragediameter,inmillimetres,ofthewearscaronthestationaryballscausedbytherotatingballunderanappliedloadinthe...
