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DEUTSCHENORMAuaust2000ShoreAandShoreDhardnesstestingofrubberDIN53505-ICs83.060PrüfungvonKautschukundElastomeren-HärteprüfungnachShoreAundShoreDThisstandard,togetherwithDINENIS0868,January1998edition,supersedesJune1987edition.InkeepingwithcurrentpracticeinstandardspublishedbytheInternationalOrganizationforStandardization(ISO),acommahasbeenusedthroughoutasthedecimalmarker.ForewordThisstandardhasbeenpreparedbyTechnicalCommitteePrüfungderphysikalischenEigenschaftenvonKautschukundElastomerenoftheNormenausschussMaterialprüfung(MaterialsTestingStandardsCom-mittee).ItconformslargelywithDINENIS0868andIS07619:1997.Theprecisiondatagivenherewereobtainedina1985interlaboratorytestinwhich14laboratoriespartici-pated.Testpiecesofthreequalitiesofrubberwerepreparedinacentrallaboratory,andtheneachlaboratorytestedfivetestpiecesofeachrubberqualityoverfoursuccessivedays.Eachtestcomprisedthreemeas-urements,themedianofwhichwasgiventothenearestShoreunit.Theresultsareshownintable3.Itwasshownthatashorterreadingintervalofonesecondandtheuseofahand-heldinstrumenthadnoinfluenceontheprecisiondata.However,thelevelofthetest(cf.table3)wasinfluencedbythemeasurementprocedureitself,particularlyinthelowerhardnessrange(around40ShoreA).Here,anincreaseby0,8unitswasobservedforareadingtimeofonesecond,andanincreaseby1,2unitsoccurredwhereahand-heldinstrumentwasused.Repeatabilityandreproducibilitycanthereforeonlybeensuredifthetestparametersspecifiedinthisstandard(areadingintervalofthreesecondsandtheuseofastand)aremaintained.AmendmentsThisstandarddiffersfromtheJune1987editioninthatitnolongerdealswithplastics,asthesearecoveredinDINENIS0868,andreferenceshavebeenupdated.PreviouseditionsDIN53503-2:1943-03;DIN53503:1948-08;DIN53505:1953-09,1957-06,1960-05,1967-04,1973-03,1973-08,1987-06.1ScopeThisstandardspecifiesthehardnesstestingofrubbertestpiecesandproducts.Thehardnessofarubberisdeterminedbyitsviscoelasticproperties,particularlytheelasticmodulusasdeterminedinDIN53504.TypeAdurometersaresuitablefortestinginthehardnessrangefrom1Oto90ShoreA,whiletypeDdurometersaretobeusedinthehighhardnessrange.Theballindentationmethodcanbeusedforthemiddlehardnessrange,eitherusinga2,5mmdiameterballasspecifiedinDIN53519-1or-forsoftertestpieces-witha5mmdiameterballasspecifiedinDINENISO2039-1.TestpieceswhicharetoosmalltobetestedasinDIN53519-1maybetestedinaccordancewithDIN53519-2.AnoverviewoftherangesofapplicationforthedifferenthardnesstestingmethodsisgiveninAppendixA.Continuedonpages2to5.TranslationbyDIN-Sprachendienst.Incaseofdoubt,theGerman-languageoriginalshouldbeconsultedastheauthoritativetext.NopariofthistranslationmaybereproducedwithoutthepriorpermissionofRef.No.DIN53505:2000-0VDeutschesInstitutfürNormunge.V.,Berlin.BeuthVerlagGmbH,10772Berlin,Germany,stheexclusiverightofsaleforGermanStandards(DIN-Normen).Englishpricegroup06SalesNo.010611.o0Page2DIN53505:2000-082NormativereferencesThisstandardincorporates,bydatedorundatedreference,provisionsfromotherpublications.Thesenorma-tivereferencesarecitedattheappropriateplacesinthetext,andthetitlesofthepublicationsarelistedbelow.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisstandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferences,thelatesteditionofthepublicationreferredtoapplies.DIN51220DIN53504DIN53519-1DIN53519-2DIN53541DIN53545DIN53598-1DINENIS0868DINENIS02039-1IS05725-1:1994IS07619:1997Generalrequirementsformaterialstestingmachines,includingverificationandcalibra-tionDeterminationoftensilestresshtrainpropertiesofrubberDeterminationofindentationhardness(IRHD)ofsoftrubberusingstandardspecimensDeterminationofindentationhardness(IRHD)ofsoftrubberusingsmallspecimensDeterminationofcrystallizationeffectsbymeasuringthehardnessofrubberDeterminationoflow-temperaturebehaviourofrubber-PrinciplesandtestmethodsStatisticalevaluationofrandomsampleswithexamplesfromtestsonelastomersandplasticsPlasticsandebonite-Determinationofindentationhardnessbymeansofadurometer(Shorehardness)(IS0868:1985)Plastics-Determinationofhardness-Part1:BallindentationmethodAccuracy(truenessandprecision)ofmeasurementmethodsandresults-Part1:GeneralprinciplesanddefinitionsRubber-Determinationofindentationhardnessbymeansofpockethardnessmeters(IS02039-1:1993)3ConceptsShorehardnessTheresistancetoindentationbyabodyofdefinedshapeandunderaspecifiedload.TheShorehardnessscalerangesfromOto100,withObeingthelowestand1O0thehighestvalue.4DesignationDesignationofthemethodoftestingthehardnessofrubberusingatypeAdurometer:TestDIN53505-ATestDIN53505-DDesignationofthemethodoftestingthehardnessofrubberusingatypeDdurometer:5Apparatus5.1DurometersDurometersshallmeetthefollowingrequirementsandshallbemarkedeither‘TypeAdurometer,DIN53505’or‘TypeDdurometer,DIN53505’,togetherwiththemanufacturer’strademarkandserialnumber.ThescaleintervalshallcorrespondtooneShorehardnessunit,andthescalespacingshallbeatleast1mm.Theshapeanddimensionsoftheindenterandpressurefootshallbeasshowninfigure1.Theloadingcharacteristicsshallbedeterminedbyapplyingforcestothein