Designation:D2370−16(Reapproved2021)StandardTestMethodforTensilePropertiesofOrganicCoatings1ThisstandardisissuedunderthefixeddesignationD2370;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationoftheelongation,tensilestrength,andstiffness(modulusofelastic-ity)oforganiccoatingswhentestedasfreefilms.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D823PracticesforProducingFilmsofUniformThicknessofPaint,CoatingsandRelatedProductsonTestPanelsD882TestMethodforTensilePropertiesofThinPlasticSheetingD1005TestMethodforMeasurementofDry-FilmThick-nessofOrganicCoatingsUsingMicrometersD3980PracticeforInterlaboratoryTestingofPaintandRelatedMaterials(Withdrawn1998)3D4708PracticeforPreparationofUniformFreeFilmsofOrganicCoatings3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1elongationatbreak,n—theincreaseinspecimenlengthfromthepointofinitialloadapplicationtothepointoffilmruptureinatensiontest.3.1.2gagelength,n—theinitiallengthofthetestspecime...
