Designation:D1525−17´1StandardTestMethodforVicatSofteningTemperatureofPlastics1ThisstandardisissuedunderthefixeddesignationD1525;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—EditorialchangesweremadethroughoutthestandardinSeptember2017.1.Scope*1.1Thistestmethodcoversdeterminationofthetempera-tureatwhichaspecifiedneedlepenetrationoccurswhenspecimensaresubjectedtospecifiedcontrolledtestconditions.1.2Thistestmethodisnotrecommendedforethylcellulose,nonrigidpoly(vinylchloride),poly(vinylidenechloride),orothermaterialshavingawideVicatsofteningrange.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsareincludedinthisstandard.1.4Duetothepotentialsafetyandenvironmentalhazardsassociatedwithmercury-filledthermometers,theuseofalter-nativetemperaturemeasuringdevices(suchasthermocouplesandRTDs)isencouragedwithliquid-in-glassthermometerscontainingmercury,theuseofalternativemeasuringdevices,suchasdigitalthermometersusingthermocoupleofRTDsensorsisencouraged.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,healthandenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThistestmethodisequivalenttoISO306inallsectionswiththeexceptionsoftheallowanceforcreep,priortothebeginningofthetestandtheallowanceofthefluidizedpowderasaheattransfermedium.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDo...
