Designation:D5592−94(Reapproved2018)StandardGuideforMaterialPropertiesNeededinEngineeringDesignUsingPlastics1ThisstandardisissuedunderthefixeddesignationD5592;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONPlasticsareincreasinglybeingusedindurableapplicationsasstructuralcomponentsonabasiscomparablewithtraditionalmaterialssuchassteelsandaluminum,aswellashighperformancecompositesystems.Unlikemanyconsumer-goodsapplications,whereplasticstypicallyserveasenclosures,thesedurablesapplicationsprimarilyinvolveload-bearingcomponentsexposedtoratherbroadvaryingoperatingenvironmentsoverthelifecycleoftheproduct.Thisnecessitatesaccesstomaterialpropertyprofilesoverawiderangeofconditions,ratherthantypicalvaluesreportedatroomtemperature.Inordertodesigneffectivelywithplastics,thedesignermusttakeintoaccounttheeffectsoftime,temperature,rate,andenvironmentontheperformanceofplastics,andtheconsequencesoffailure.1.Scope1.1Thisguidecoverstheessentialmaterialpropertiesneededfordesigningwithplastics.Itspurposeistoraisetheawarenessoftheplasticscommunityregardingthespecificconsiderationsinvolvedinusingtheappropriatematerialpropertiesindesigncalculations.1.2Thisguideisintendedonlyasaconvenientresourceforengineeringdesign.Itshouldbenotedthatthespecificoper-atingconditions(temperature,appliedstressorstrain,environment,etc.andcorrespondingdurationofsuchexpo-sures)couldvarysignificantlyfromoneapplicationtoanother.Itis,therefore,theresponsibilityoftheusertoperformanypertinenttestsunderactualconditionsofusetodeterminethesuitabilityofthematerialintheintendedapplication.1.3TheapplicableISOandASTMstandardmethodsfortherelevantmaterialpropertiesarelistedinthisguideforthebenefitofdesignengineers.1.4Itshouldbenotedthatforsomeofthedesiredproperties,noASTMorISOstandardsexist.TheseincludepvT...
