Designation:D2000−12ApprovedbySocietyofAutomotiveEngineersSAERecommendedPracticeJ200StandardClassificationSystemforRubberProductsinAutomotiveApplications1ThisstandardisissuedunderthefixeddesignationD2000;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisclassificationsystemcoversthepropertiesofvul-canizedrubbermaterials(naturalrubber,reclaimedrubber,syntheticrubbers,aloneorincombination)thatareintendedfor,butnotlimitedto,useinrubberproductsforautomotiveapplications.NOTE1—ThisclassificationsystemmayservemanyoftheneedsofotherindustriesinmuchthesamemannerasSAEnumberedsteels.Itmustberemembered,however,thatthissystemissubjecttorevisionwhenrequiredbyautomotiveneeds.Itisrecommendedthatthelatestrevisionalwaysbeused.1.2Thisclassificationsystemisbasedonthepremisethatthepropertiesofallrubberproductscanbearrangedintocharacteristicmaterialdesignations.Thesedesignationsaredeterminedbytypes,basedonresistancetoheataging,andclasses,basedonresistancetoswellinginoil.Basiclevelsarethusestablishedwhich,togetherwithvaluesdescribingaddi-tionalrequirements,permitcompletedescriptionofthequalityofallelastomericmaterials.1.3Inallcaseswheretheprovisionsofthisclassificationsystemwouldconflictwiththoseofthedetailedspecificationsforaparticularproduct,thelattershalltakeprecedence.NOTE2—Whentherubberproductistobeusedforpurposeswheretherequirementsaretoospecifictobecompletelyprescribedbythisclassi-ficationsystem,itisnecessaryforthepurchasertoconsultthesupplierinadvance,toestablishtheappropriateproperties,testmethods,andspeci-ficationtestlimits.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.2.ReferencedDocuments2.1ASTMStandards:2D395TestMethodsforRubberProperty—CompressionSetD412TestMethodsforVulcanizedR...
