ASTMDI67967H075753000227201I&-69-0/\Designation:D1674-67(Reapproved1977)StandardMethodsofTestingPOLYMERIZABLEEMBEDDINGCOMPOUNDSUSEDFORELECTRICALINSULATION’ThisstandardisissuedunderthefixeddesignationD1674;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(E)indicatesaneditorialchangesincethelasfrevisionorreapproval.1.Scope1.1Thesemethodscoverelectrical,mechani-cal,andthermaltestsforpolymerizablecom-poundsusedforencasingorembeddingelectricalandelectroniccomponentsorassemblies.Theproceduresappearinthefollowingsections:ElectricalInsulatingMaterialsatCommer-cialPowerFrequencies’D150TestMethodsforA-cLoSSCharacter-isticsandPermittivity(DielectricConstant)ofSolidElectricalInsulatingMaterials*D229MethodofTestingRigidSheetandPlateMateriaisUsedforElectricalInsu-Sampling..3D374TestMethodsforThicknessofSolidSpecimenPreparationandElectricalInsulation’ASTMProcedureSectionsMethod1ati0n3....................Conditioning..............4D618Hardness...................5to11D2240CoeficientofLinearThermalExpansion................12to18D696SpecificGravity..............19to26D792Conductivity..............27to33...ThermalShockResistance.....34to39...DielectricConstantandDissipa-tionFactor................40to48...DielectricStrength...........49to55...ArcResistance...............56to60D495EffectofHighHumidity.......61to66...FlameResistance(ignitiontimeandburningtime)..........67D229DielectricStrengthofEmbeddedElectrodes................68to75D1491,2Thecompoundsmustcurewithoutpres-sureandmayormaynotrequireheattoaccom-plishthereaction.Theyarerequiredtoelectri-callyinsulateandmechanicallyprotectandsup-porttheparforassemblywithoutacase,pot,orotherexternalreinforcementaftercuring.1.3Thevaluesstatesininch-poundunitsaretoberegardedasthestandard.2.ApplicableDocuments2.1ASTMStandards:D149TestMethodforDielectricBreakdownVoltageandDielectricStrengthofSolid.C...
