Designation:D6456−10StandardSpecificationforFinishedPartsMadefromPolyimideResin1ThisstandardisissuedunderthefixeddesignationD6456;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationisintendedtobeameansofcallingoutfinishedplasticpartsreadyforindustrialorconsumeruse.1.2Thisspecificationcoversfinishedpartsandshapesfromwhichpartsaremachined,madefromasemi-crystallinepolyimide(PI).1.3ThisspecificationisintendedtoreplaceMIL-R-46198andProvisionalStandardSpecificationPS93.NOTE1—ThereisnoknownISOequivalenttothisstandard.1.4Thisspecificationcoverspartsmadefromsemi-crystallinepolyimide,whichisathermosettingmaterialthatshowsnosofteningormeltingbyDMA(D4065)atorbelow260°C(500°F).1.5SincePIisathermosetresin,noprovisionsareincludedforrecycledproducts.1.6TheclassificationsystemoutlinedinthisspecificationisintendedtobeidenticaltothatusedbyDepartmentofDefenseforover20years.Nochangesareintendedatthistime.1.7ThevaluesarestatedinSIunitsandareregardedasstandardinallpropertyanddimensionaltables.Forreferencepurposes,inch-poundunitsarestatedinparentheses.1.8Application—Partsinthisspecificationaregenerallyusedforapplicationsrequiringthefollowingcombinationofproperties:lowcoefficientoffriction,andlowthermalexpan-sioncoupledwithheatresistanceforcontinuousoperationattemperaturesupto260°C(500°F)andforshort-termexcur-sionsupwardto482°C(900°F).1.9Thefollowingprecautionarycaveatpertainsonlytothetestmethodportion,Section12,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D638TestMethodforTensilePropertiesofPlasticsD6...
