Designation:D4673−16StandardClassificationSystemforandBasisforSpecificationforAcrylonitrile–Butadiene–Styrene(ABS)PlasticsandAlloysMoldingandExtrusionMaterials1ThisstandardisissuedunderthefixeddesignationD4673;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1ThisclassificationsystemcoversonlyABSmaterialsandABSalloyssuitableforinjectionmoldingandextrusion.Someofthesecompositionsarealsosuitableforcompressionmolding.RecycleABSandalloyswillbeaddressedinaseparatestandard.1.2Thisclassificationsystemandsubsequentlinecallout(specification)areintendedtoprovideameansofcallingoutplasticmaterialsusedinthefabricationofenditemsorparts.Itisnotintendedfortheselectionofmaterials.Materialsaretobeselectedbypersonnelwithexpertiseintheplasticsfieldwheretheeconomics,theenvironmenttobeencountered,theinherentpropertiesofthematerials,thepartdesign,thepartperformancerequired,andthemanufacturingprocesstobeemployedallenterintotheselection.1.3Thepropertiesincludedinthisclassificationsystemarethoserequiredtoidentifythecompositionscovered.OtherrequirementsnecessarytoidentifyparticularcharacteristicsimportanttospecializedapplicationsareaddressedbyusingthesuffixesgiveninSection5.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thefollowingprecautionarycaveatpertainsonlytothetestmethodsportion,Section12,ofthisclassificationsystem:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThisstandardandISO2580addressthesamesubjectmatter,butdifferintechnicalcontent.2.Re...
