Designation:D1415−06(Reapproved2012)StandardTestMethodforRubberProperty—InternationalHardness1ThisstandardisissuedunderthefixeddesignationD1415;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversaprocedureformeasuringthehardnessofvulcanizedorthermoplasticrubber.Thehardnessisobtainedbythedifferenceinpenetrationdepthofaspecifieddimensionballundertwoconditionsofcontactwiththerubber:(1)withasmallinitialforceand(2)withamuchlargerfinalforce.Thedifferentialpenetrationistakenataspecifiedtimeandconvertedtoahardnessscalevalue.1.2ThistestmethodistechnicallysimilartoISO48.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1349PracticeforRubber—StandardConditionsforTest-ingD2240TestMethodforRubberProperty—DurometerHard-nessD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustries2.2InternationalStandard:3ISO48Rubber,VulcanizedorThermoplastic—DeterminationofHardness(Hardnessbetween10and100IRHD)3.SummaryofTestMethods3.1Fourproceduresaregiventoaccommodatespecimensofdifferentdimensionshardnessofvulcanizedorthermoplas-ticrubbersonflatsurfaces:TypeS1andS2,Standardhardnesstests;TypeM,Micro-hardnesstests;TypeL,Lowhardnesstest;TypeH,Highhardnesstest.3.1.1TypesS1andS2(refertoTable1)—ThestandardtestforhardnessistheappropriatemethodforspecimenshavingathicknessdescribedinSection6,andisappropriateforthosehavingahardnessof35IRHDto85IRHD.Itmaybeusedforthoseintherangeof30IRHDto95IRHD.NOTE1—Thehardnessvaluesobt...
