Designation:A971/A971M−17StandardTestMethodforMeasuringEdgeTaperandCrownofFlat-RolledElectricalSteelCoils1ThisstandardisissuedunderthefixeddesignationA971/A971M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodprovidesaprocedureformeasuringedgetaperandcrownofflat-rolledelectricalsteelcoilsasproducedatthesteelmill.1.2Thevaluesandequationsstatedincustomary(cgs-emuandinch-pound)unitsorSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisstandard.1.3Thefollowingmaterialspecificationsincluderequire-mentsforedgetaperorcrown:A677,A683,A726,A876,andA1086.SpecificationA840alsoincludesrequirementsforedgetaperorcrown,butithasbeenwithdrawnandreferencetoitisincludedforhistoricalpurposes.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2A340TerminologyofSymbolsandDefinitionsRelatingtoMagneticTestingA677SpecificationforNonorientedElectricalSteelFullyProcessedTypesA683SpecificationforNonorientedElectricalSteel,Semi-processedTypesA726SpecificationforCold-RolledMagneticLaminationQualitySteel,SemiprocessedTypesA840Specificatio...
