Designation:D1039−16(Reapproved2022)StandardTestMethodsforGlass-BondedMicaUsedasElectricalInsulation1ThisstandardisissuedunderthefixeddesignationD1039;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscovertheevaluationofthecharac-teristicsofglass-bonded,natural,orsyntheticmicamaterialsintendedforuseaselectricalinsulation.1.2Glassbondedmicamaterialsarecommerciallyavailableinbothinjectionmoldedandcompressionmoldedtypes.Thesetestmethodsareapplicabletobothtypesexceptfortensilestrengthmethods.(SeeSection41.)1.3Thetestmethodsappearinthefollowingsections:TestMethodSectionASTMTestMethodArcResistance57–59D495CompressiveStrength33–35D695Conditioning5D618DielectricStrength48–51D149DissipationFactor43–47D150andD2149HeatDistortionTemperature24–29D648ImpactResistance36–39D256ModulusofRupture30–32D790andC674Permittivity43–47D150andD2149Porosity13–16D116Resistivity,VolumeandSurface52–56D257RockwellHardness10–12D785SpecificGravity6–9D792Specimens4TensileStrength40–42D638andD651Terminology3D1711ThermalConductivity17–19C177andE1225ThermalExpansion20–23E228andE289Thickness49and54D3741.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.SeealsoSections45,49,54,and58.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)C...
