GMW GMW14743-2019

TemplateForENGSTDSCG757WORLDWIDEENGINEERINGSTANDARDSMaterialSpecificationGMW14743ElastomerforWiperBlades©Copyright2019GeneralMotorsCompanyAllRightsReservedOctober2019Page1of51ScopeNote:Nothinginthisstandardsupercedesapplicablelawsandregulations.Note:IntheeventofconflictbetweentheEnglishanddomesticlanguage,theEnglishlanguageshalltakeprecedence.1.1MaterialDescription.Materialscoveredbythisspecificationaredividedintofour(4)types:1.1.1TypeA.EthylenePropyleneDieneTerpolymer(EPDM).1.1.2TypeB.NaturalRubber(NR).1.1.3TypeC.PolychloropreneRubber(CR).1.1.4TypeD.Drawingdefined(e.g.,usingSAEJ200orASTMD2000linecallout).1.2Symbols.Notapplicable.1.3Applicability.AllVehicles.WiperBlades.1.4Remarks.None.2ReferencesNote:Onlythelatestapprovedstandardsareapplicableunlessotherwisespecified.2.1ExternalStandards/Specifications.ASTMD2000ISO188ISO1817ISO3865ISO37ISO1431-1ISO2285SAEJ200ISO482.2GMStandards/Specifications.9985670B4400064GMW14162GMW14270B0400218GMW30592.3AdditionalReferences.None.3Requirements3.1RequirementsonTestSpecimens.3.1.1TestSamples.Unlessotherwisespecified,theshape,sizeandnumberoftestpiecesshallbeinaccordancewiththerelevanttestprocedure.Unlessotherwisespecified,samplesarefinishedpartsortobetakenfromfinishedparts.Ifnototherwisestated,mechanicalpropertiesindeliverystateandafterheatorfluidimmersionaretobetestedat23°C±3°Candwiththesametestprocedures.3.1.2Conditioning.Conditioningshallbeasspecifiedintherelevanttestprocedure.3.1.3Equipment.Conformingtotherelevanttestprocedures.3.1.4Calibration.Thetestfacilitiesandequipmentshallbeingoodworkingorderandshallhaveavalidcalibrationlabel.3.1.5Alternatives.Alternativetestfacilitiesandequipmentmayalsobeused.However,allmeasuringvariablesasspecifiedinthisspecificationshallbedeterminedcorrectlywithrespecttoitsphysicaldefinition.3.1.6Facilities.Conformingtotherelevanttestprocedures.GMWORLDWIDEENGINEERINGSTANDARDSTemplateForENGSTDSGMW14743©Copyright2019GeneralMotorsCompanyAllRightsReservedOctober2019Page2of53.1.7Deviations.Deviationsfromtherequirementsofthisspecificationshallhavebeenagreedupon.Suchdeviationsshallbespecifiedoncomponentdrawings,testcertificates,reports,etc.3.2MaterialandPerformanceRequirements.MaterialandperformancerequirementsaresummarizedinTable1.Table1:MaterialandPerformancePropertiesPropertyTestProcedureUnitValueHardnessTypeA,B,andCISO48,MethodMIRHD60±5TypeDAsspecifiedondrawing/mathdatafileShoreAAsspecifiedondrawingTensileStrengthTypeA,B,CISO37,Type4dumbbell,200mm/minute±20mm/minuteMPa10minimumTypeDAsspecifiedondrawing/mathdatafileMPaAsspecifiedondrawingTensileModulusat100%ElongationTypeA,B,CISO37,Type4dumbbell,200mm/minute±20mm/minuteMPa2minimumTypeDAsspecifiedondrawing/mathdatafileMPaAsspecifiedondrawingElongationatBreakTypeAISO37,Type4dumbbell,200mm/minute±20mm/minute%200minimumTypeBISO37,Type4dumbbell,200mm/minute±20mm/minute%350minimumTypeCISO37,Type4dumbbell,200mm/minute±20mm/minute%250minimumTypeDAsspecifiedondrawing/mathdatafile%AsspecifiedondrawingAgeResistance(HeatAging)TypeA,B,CISO188,MethodB,168h-2hat80°C±3°CChangeinHardnessChangeinTensileStrengthChangeinElongationatBreakChangeinVolumeIRHD%%%±5maximum-25maximum-25maximum±5maximumTypeDAsspecifiedondrawing/mathdatafileAsspecifiedondrawingTensionSetTypeA,B,CISO2285,TestPieceType4toISO37,24h-2hat70°C±3°C,50%±5%strain,followedbycoolingfor2h-0.2hat23°C±5°C%25maximumTypeDAsspecifiedondrawing/mathdatafile%AsspecifiedondrawingOzoneResistanceTypeA,B,CISO1431-1,50pphm,40°C±2°C,15%strain,72h-2hvisualexaminationNocrackspermissibleTypeDAsspecifiedondrawing/mathdatafileNocrackspermissibleGMWORLDWIDEENGINEERINGSTANDARDSTemplateForENGSTDSGMW14743©Copyright2019GeneralMotorsCompanyAllRightsReservedOctober2019Page3of5PropertyTestProcedureUnitValuePaintStainingTypeA,B,CISO3865,MethodA,usingproductionrepresentativepaintedpanels.Basecoatshallbewhite.Todeveloplatentstain,thepanelsshallbeexposedtoUltraviolet(UV)followingtheheatexposure.UVExposuretoGMW14162/B/2MJ/m²minimum.NostainingpermissibleTypeDISO3865,MethodA,usingproductionrepresentativepaintedpanels.Basecoatshallbewhite.Todeveloplatentstain,thepanelsshallbeexposedtoUVfollowingtheheatexposure.LengthofUVexposureshallbe4h±0.5hat13W/m2±2W/m2.NostainingpermissibleFluidResistanceNote1TypeA,B,C,DISO1817Water:2PropanolB0400218(2:1),24h-2hat23°C±5°CChangeinHardnessChangeinVolumeIRHD%±5maximum±5maximumTypeA,B,C,DISO1817,Immersioninwater:EthanolB4400064(1:1),24h-2hat23°C±5°CChangeinHardnessChangeinVolumeIRHD%±5maximum±5maximumTypeA,B,C,DISO1817,ImmersioninWater:Methanol9985670(3:2),24h-2hat23°C±5°CChangeinHardnessChangeinVolumeShoreA%±5maximum±5maximumNote:%=percent(age),IRHD=InternationalRubberHardnessDegree;UV=Ultraviolet.Note1:Washerfluidisregionallydifferent;so,testinginallfluidsmustbeperformed.3.3AllmaterialssuppliedtothisstandardmustcomplywithGMW3059,RestrictedandReportableSubstances,includingtherequirementtoobtainaGM-approvedInternationalMaterialDataSystem(IMDS)submission.4ManufacturingProcessNotapplicable.5RulesandRegulations5.1LegalRegulations.Allmaterialsmustsatisfyappli