Designation:D1939-94AMERICANSOCIETYFORTESTINGAh3MATERIALS1916RaceStPh,ladelph,a.Pa19103ReprmtedfromtheAnnualBookotASMSkwdardsCcpyrlghtASTMIfnc!Itsled8”lhecurrentcombmedIndexwillappear,nthenexlednlonStandardPracticeforDeterminingResidualStressesinExtrudedorMoldedAcrylonitrile-Butadiene-Styrene(ABS)PartsbyImmersioninGlacialAceticAcid’ThisstandardisissuedunderthefixeddesignationD1939;thenumberimmediatelyfollowmgthedesignattonindicatestheyearoforiginaladoptlonor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepstlon(6)indtcatesanedttonalchangestncethelastrevtsionorreapproval.1.Scope1.1Thispracticecoverstheevaluationofresidualstressesinextrudedprofiles,asextruded,orinmoldedABSparts,asmolded.Residualstressesareindicatedbythepresenceofcrackingofthespecimenuponimmersioninglacialaceticacid.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection7.NOTEl-ThereisnoequivalentIS0standard.2.ReferencedDocuments2.1ASTMStandards:D883TerminologyRelatingtoPlastics’D1600TerminologyforAbbreviatedTermsRelatingtoPlastics*D4673SpecificationforAcrylonitrile-Butadiene-Styrene(ABS)MoldingandExtrusionMaterials33.Terminology3.1General-DefinitionsareinaccordancewithTermi-nologyD883andabbreviationsareinaccordancewithTerminologyD1600,unlessotherwiseindicated.4.SignificanceandUse4.1Thispracticeisapplicablefordistinguishingbetweenspecimensthatarehighlystressedandspecimensthatarenot,providedthatotherconditionsarethesame.4.2Nodirectcorrelationhasbeenestablishedbetweentheresultsoftheaceticacidimmersiontestandotherproperties.Forthisreason,aceticacidimmersionisnotrecommendedasasubstituteforothertests,norisitintendedforuseinpurchasingspecifications.However,despitethislimitation,thispracticedoesyieldinformationo...
