Designation:D2070−16´1StandardTestMethodforThermalStabilityofHydraulicOils1ThisstandardisissuedunderthefixeddesignationD2070;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—TheformattingoffootnoteswascorrectededitoriallyinApril2017.1.Scope*1.1Thistestmethod2isdesignedprimarilytoevaluatethethermalstabilityofhydrocarbonbasedhydraulicoilsalthoughoxidationmayoccurduringthetest.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:3D4057PracticeforManualSamplingofPetroleumandPetroleumProducts2.2CopperDevelopmentAssociationStandard4UNSC11000ElectrolyticToughPitchCopper2.3AmericanIronandSteelInstituteStandard(AISI)5W-1CarbonToolSteel3.SummaryofTestMethod3.1Abeakercontainingtestoil,copperandironrodsisplacedinanaluminumblockinanelectricgravityconvectionovenfor168hatatesttemperatureof135°C.Atthecompletionofthetest,thecopperandsteelrodsareratedvisuallyfordiscolorationandtheoilisanalyzedforthequantityofsludge.4.SignificanceandUse4.1Thermalstabilitycharacterizesphysicalandchemicalpropertychangeswhichmayadverselyaffectanoil’slubricat-ingperformance.Thistestmethodevaluatesthethermalstabilityofahydraulicoilinthepresenceofcopperandsteelat135°C.Rodcolorsareth...
