Designation:D6425−19StandardTestMethodforMeasuringFrictionandWearPropertiesofExtremePressure(EP)LubricatingOilsUsingSRVTestMachine1ThisstandardisissuedunderthefixeddesignationD6425;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThistestmethodrepresentsthetransformationofDIN51834-2:1997.TheDINworkinggroupimplementedchangesatitsannualmeetinginMunichinSeptember2000.ASTMCommitteeD02adoptedthesemodificationsascloselyaspossible.TheDINworkinggroupwidensthescopeofthestandardtoaccommodatedifferenttestconditionsandrefinesrepeatabilityandreproducibilityonthebaseoffourinternationalRRtests.Italsointroducesthewearvolumeasatribologicalquantity.1.Scope*1.1Thistestmethodcoversanextremepressure(EP)lubricatingoil’scoefficientoffrictionanditsabilitytoprotectagainstwearwhensubjectedtohigh-frequency,linearoscilla-tionmotion.TheprocedureisidenticaltothatdescribedinDIN51834.1.2Thistestmethodcanalsobeusedtodeterminetheabilityofanon-EPlubricatingoiltoprotectagainstwearanditscoefficientoffrictionundersimilartestconditions.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2A295SpecificationforHigh-CarbonAnti-FrictionBearingSteelD235SpecificationforM...
