ASTMDb38M9bm07595300592545919mDesignation:D6381111-96AMERICANSOCIETYFORTESTINGANDMATERIALS100BarrHarborDr.,WestConshohod(en,PA19428AnAmefkanNatlonalStandardIfnotlistedinthecurrentcombinedindex,wllappearinthenextedii.ReprintedhantheAnnualBookofASTMStandards.CopyrQhtASTMStandardTestMethodforTensilePropertiesofPlastics(Metric)’ThisstandardisissuedunderthefixeddesignationD638M:thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(6)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.IThistestmethodcoversthedeterminationofthetensilepropertiesofunreinforcedandreinforcedplasticsintheformofstandarddumbbell-shapedtestspecimenswhentestedunderdefinedconditionsofpretreatment,tempera-ture,humidity,andtestingmachinespeed.1.2Thistestmethodcanbeusedfortestingmaterialsofanythicknessupto10mm.However,fortestingspecimensintheformofthinsheeting,includingfilmlessthan1.Omm,TestMethodsD882isthepreferredtestmethod.Materialswithathicknessgreaterthan10mmmustbereducedbymachining.1.3ThistestmethodincludestheoptionofdeterminingPoisson’sratioatroomtemperature.NOTE1-ThistestmethodandIS0527-1966aretechnicallyequiv-alent.NOTE2-Thistestmethodisthecompaniontoinch-poundTestMethodD638.NOTE3-Thistestmethodmaybeusedfortestingphenolicresinmoldedorlaminatedmaterials.However,wherethesematerialsareusedaselectricalinsulation,suchmaterialsshouldbetestedinaccordancewithTestMethodsD229andTestMethodD651.NOTE4-Thistestmethodisnotintendedtocoverprecisephysicalprocedures.Itisrecognizedthattheconstant-rate-of-crosshead-movementtypeoftestleavesmuchtobedesiredfromatheoreticalstandpoint,thatwidedifferencesmayexistbetweenrateofcrossheadmovementandrateofstrainbetweengagemarksonthespecimen,andthatthetestingspeedsspecifieddisguiseimportanteffectscharacteristicofmaterialsintheplasticstate.Further,itisrealizedthatvariationsinthethicknessesoftestspecimens,whicharepermi...
