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1、e1Designation:D2240–04StandardTestMethodfor1RubberProperty—DurometerHardnessThisstandardisissuedunderthefixeddesignationD2240;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatesthe
2、yearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1eNOTE—EditorialchangesweremadeinApril2005.1.ScopeD374TestMethodsforThicknessofSolidElectricalInsu-1.1Thistes
3、tmethodcoverstwelvetypesofrubberhardnesslationmeasurementdevicesknownasdurometers:TypesA,B,C,D,D618PracticeforConditioningPlasticsforTestingDO,E,M,O,OO,OOO,OOO-S,andR.TheprocedureforD785TestMethodforRockwellHardnessofPlasticsanddeterminingindentationhardnessofsubstancesclassified
4、asElectricalInsulatingMaterialsthermoplasticelastomers,vulcanized(thermoset)rubber,elas-D1349PracticeforRubber—StandardTemperaturesFortomericmaterials,cellularmaterials,gel-likematerials,andTestingsomeplasticsisalsodescribed.D1415TestMethodforRubberProperty—International1.2Thist
5、estmethodisnotequivalenttootherindentationHardnesshardnessmethodsandinstrumenttypes,specificallythoseD4483PracticeforDeterminingPrecisionforTestMethoddescribedinTestMethodD1415.StandardsintheRubberandCarbonBlackIndustries1.3ThistestmethodisnotapplicabletothetestingofF1957TestMeth
6、odforCompositeFoamHardness-coatedfabrics.DurometerHardness2.2ISOStandard:31.4ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesareforinformationISO/IEC17025:1999GeneralRequirementsfortheCom-only.ManyofthestateddimensionsinSIaredirectconver-petenceofTes
7、tingandCalibrationLaboratoriessionsfromtheU.S.CustomarySystemtoaccommodatethe3.SummaryofTestMethodinstrumentation,practices,andproceduresthatexistedpriortotheMetricConversionActof1975.3.1Thistestmethodpermitshardnessmeasurementsbased1.5Allmaterials,instruments,orequipmentusedfor
8、theoneitherinitialindentationorindentationafter
