Designation:A876−17´1StandardSpecificationforFlat-Rolled,Grain-Oriented,Silicon-Iron,ElectricalSteel,FullyProcessedTypes1ThisstandardisissuedunderthefixeddesignationA876;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallycorrectedunitsinNoteBofTableX1.1inJuly2017.1.Scope1.1Thisspecificationcoversthedetailedrequirementstowhichthespecifiedgradesofflat-rolled,grain-oriented,fullyprocessedelectricalsteelsshallconform.Thesesteelsareusedprimarilyintransformercoresoperatingatmoderatetohighmagneticfluxdensitiesatcommercialpowerfrequencies(50and60Hz).1.2Thesegrain-orientedelectricalsteelsarelow-carbon,silicon-ironalloyswithasiliconcontentofapproximately3.2%inwhichlowcorelossandhighpermeabilityinthedirectionofrollinghavebeenachievedbyappropriatemetal-lurgicalprocessing.1.3Theelectrical-steelgradesdescribedinthisspecificationinclude(1)conventionalgrain-orientedelectricalsteeltestedat1.5T(15kG)inaccordancewithTestMethodA343/A343M,(2)conventionalgrain-orientedelectricalsteeltestedat1.7T(17kG)inaccordancewithTestMethodA343/A343M,(3)high-permeabilitygrain-orientedelectricalsteeltestedat1.7T(17kG)inaccordancewithTestMethodA343/A343M,and(4)laser-scribedhigh-permeabilitygrain-orientedelectricalsteeltestedat1.7T(17kG)inaccordancewithTestMethodsA804/A804M.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstocustomary(cgs-emuandinch-pound)unitswhichareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternat...
