Designation:F433−02(Reapproved2014)´1StandardPracticeforEvaluatingThermalConductivityofGasketMaterials1ThisstandardisissuedunderthefixeddesignationF433;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallycorrectedFootnote6inJuly2014.1.Scope1.1Thispracticecoversameansofmeasuringtheamountofheattransferquantitativelythroughamaterialorsystem.1.2ThispracticeissimilartotheHeatFlowMeterSystemofTestMethodC518,butmodifiedtoaccommodatesmalltestsamplesofhigherthermalconductance.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C518TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheHeatFlowMeterApparatusD2214TestMethodforEstimatingtheThermalConductiv-ityofLeatherwiththeCenco-FitchApparatus(Withdrawn2008)3F104ClassificationSystemforNonmetallicGasketMateri-als3.Terminology3.1Definitions:3.1.1thermalconductivity,k,ofasolidmaterial—thetimerateofsteadyheatflow,watts(orBtu/h),throughaunitarea,m2(orft2),perunittemperaturegradientinthedirectionperpendiculartoanisothermalsurface°C/m(or°F/in.).Thek-factorisexpressedW/m·K(Btu·in./h·ft2·°F).3.2Symbols:k=thermalconductivity,W/m·K(Btu·in./h·ft2·°F)C=thermalconductance,W/m2·K(Btu/h·ft2·°F)∆x=samplethickness,mm(in.)A=samplecross-sectionalarea,m2(ft2)q=heatflow,W(Btu/h)φ=heatflowtransduceroutput,mVN=heatflowtransducercalibrationconstant,W/m2·mV(Btu/h·ft2·mV)Nφ=heatflux,W/m2(Btu/h·ft2)∆T=temperaturedifference,°C(°F)ormVT1=temperatureoflowersamplesur...
