ASTM_A_677_-_16.pdf

Designation:A67716Standard Specification forNonoriented Electrical Steel Fully Processed Types1This standard is issued under the fixed designation A677;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.1.Scope1.1 This specification covers the detailed requirements towhich flat-rolled nonoriented fully processed electrical steelshall conform.1.2 This steel is produced to specified maximum core-lossvalues and is intended primarily for commercial power fre-quency(50 and 60 Hz)applications in magnetic devices.Desirable core-loss and permeability characteristics are devel-oped during mill processing,so additional heat treatment bythe user is usually not necessary.1.3 These nonoriented fully processed electrical steels arelow-carbon,silicon-iron,or silicon-aluminum-iron alloys con-taining up to about 3.5%silicon and a small amount ofaluminum.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.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 FrameA664 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 MaterialsA720/A720M Test Method for Ductility of NonorientedElectrical SteelA937/A937M Test Method for Determining InterlaminarResistance of Insulating Coatings Using Two AdjacentTest SurfacesA971/A971M Test Method for Measuring Edge Taper andCrown of Flat-Rolled Electrical Steel CoilsA976 Classification of Insulating Coatings for ElectricalSteels by Composition,Relative Insulating Ability andApplicationE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE140 Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness,Vickers Hardness,RockwellHardness,Superficial Hardness,Knoop Hardness,Sclero-scope Hardness,and Leeb HardnessE384 Test Method for Microindentation Hardness of Mate-rials3.Terminology3.1 DefinitionsThe terms and symbols used in this speci-fication are defined in Terminology A340.4.Classification4.1 The nonoriented electrical steel types described by thisspecification are as shown in Table 1.5.Ordering Information5.1 Orders for material under this specification shall includeas much of the following information as necessary to describethe desired material adequately:5.1.1 ASTM specification number.5.1.2 Core-loss type number.5.1.3 Surface coating type.5.1.4 Thickness,width,and length(if in cut lengths insteadof coils).5.1.5 Total weight of ordered item.5.1.6 Limitations in coil size or lift weights.1This specification is under the jurisdiction of ASTM Committee A06 onMagnetic Properties and is the direct responsibility of Subcommittee A06.02 onMaterial Specifications.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1973.Last previous edition approved in 2012 as A677 12.DOI:10.1520/A0677-16.2For 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 States1 5.1.7 End UseThe user shall disclose as much pertinentinformation as possible about the intended application toenable the producer to provide material characteristics mostsuitable for specific fabricating practices.5.1.8 Special requirements or exceptions to the provisionsof this specification.6.Manufacture6.1 Typical Melting and Casting:6.1.1 These fully processed electrical steels may be made bybasic-oxygen,electric-furnace,or other steelmaking practice.6.1.2 These electrical steels are characterized by lowcarbon,usually less than 0.020%.The principal alloyingelement is commonly silicon,but aluminum up to about 0.8%is sometimes used instead of or in addition to silicon,depend-ing on mill-processing practice for the desired magnetic grade.Individual producers will often have different silicon or alumi-num contents for a particular grade because of intrinsicmill-processing procedures.6.1.3 Sulfur content is typically less than 0.025%and isusually lowest in the