ASTM_A_876_-_17e1.pdf

Designation:A876171Standard Specification forFlat-Rolled,Grain-Oriented,Silicon-Iron,Electrical Steel,Fully Processed Types1This standard is issued under the fixed designation A876;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially corrected units in Note B of Table X1.1 in July 2017.1.Scope1.1 This specification covers the detailed requirements towhich the specified grades of flat-rolled,grain-oriented,fullyprocessed electrical steels shall conform.These steels are usedprimarily in transformer cores operating at moderate to highmagnetic flux densities at commercial power frequencies(50and 60 Hz).1.2 These grain-oriented electrical steels are low-carbon,silicon-iron alloys with a silicon content of approximately3.2%in which low core loss and high permeability in thedirection of rolling have been achieved by appropriate metal-lurgical processing.1.3 The electrical-steel grades described in this specificationinclude(1)conventional grain-oriented electrical steel tested at1.5 T(15 kG)in accordance with Test Method A343/A343M,(2)conventional grain-oriented electrical steel tested at 1.7 T(17 kG)in accordance with Test Method A343/A343M,(3)high-permeability grain-oriented electrical steel tested at 1.7 T(17 kG)in accordance with Test Method A343/A343M,and(4)laser-scribed high-permeability grain-oriented electrical steeltested at 1.7 T(17 kG)in accordance with Test MethodsA804/A804M.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to customary(cgs-emu and inch-pound)unitswhich are provided for information only and are not consideredstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A34/A34M Practice for Sampling and Procurement Testingof Magnetic MaterialsA340 Terminology of Symbols and Definitions Relating toMagnetic TestingA343/A343M Test Method for Alternating-Current Mag-netic Properties of Materials at Power Frequencies UsingWattmeter-Ammeter-Voltmeter Method and 25-cm Ep-stein Test FrameA345 Specification for Flat-Rolled Electrical Steels forMagnetic ApplicationsA664 Practice for Identification of Standard Electrical SteelGrades in ASTM SpecificationsA700 Guide for Packaging,Marking,and Loading Methodsfor Steel Products for ShipmentA717/A717M Test Method for Surface Insulation Resistivityof Single-Strip SpecimensA719/A719M Test Method for Lamination Factor of Mag-netic MaterialsA721/A721M Test Method for Ductility of Oriented Electri-cal SteelA804/A804M Test Methods for Alternating-Current Mag-netic Properties of Materials at Power Frequencies UsingSheet-Type Test SpecimensA937/A937M Test Method for Determining InterlaminarResistance of Insulating Coatings Using Two AdjacentTest SurfacesA976 Classification of Insulating Coatings for Electrical1This specification is under the jurisdiction of ASTM Committee A06 onMagnetic Properties and is the direct responsibility of Subcommittee A06.02 onMaterial Specifications.This specification replaces A665,A725,and A843.Current edition approved April 1,2017.Published May 2017.Originallyapproved in 1987.Last previous edition approved in 2012 as A876 12.DOI:10.1520/A0876-17E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 Steels by Composition,Relative Insulating Ability andApplication3.Terminology3.1 The terms and symbols used in this specification aredefined in Terminology A340.4.Classification4.1 The ASTM core-loss type designations,formulated inaccordance with Practice A664,for grain-oriented electricalsteels covered by this specification are listed