1、Designation:A68316Standard Specification forNonoriented Electrical Steel,Semiprocessed Types1This standard is issued under the fixed designation A683;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、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 semiprocessed electrical steelshall conform.1.2 This steel is
3、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 through heat treatment by the user.1.3 These nonoriented,semiprocessed electrical
4、steels arelow carbon,silicon-iron or silicon-aluminum-iron alloys con-taining up to about 2.5%silicon and less than 1%aluminum.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 ar
5、e 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 Ma
6、g-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 ShipmentA719/
7、A719M Test Method for Lamination Factor of Mag-netic MaterialsA720/A720M Test Method for Ductility of NonorientedElectrical SteelA971 Test Method for Measuring Edge Taper and Crown ofFlat-Rolled Electrical Steel CoilsA976 Classification of Insulating Coatings for ElectricalSteels by Composition,Rela
8、tive Insulating Ability andApplication3.Terminology3.1 The terms and symbols used in this specification aredefined in Terminology A340.4.Classification4.1 The nonoriented electrical steel types described by thisspecification are shown in Table 1.5.Ordering Information5.1 Orders for material under th
9、is 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
10、ordered item.5.1.6 Limitations in coil size or lift weights.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 requirement
11、s or exceptions to the provisionsof this specification.6.Materials and Manufacture6.1 Typical Melting and Casting:6.1.1 These semiprocessed electrical steels may be made bybasic-oxygen,electric furnace,or other steelmaking prac-tice(s).6.1.2 These electrical steels are characterized by lowcarbon,usu
12、ally less than 0.030%.The principal alloyingelement is commonly silicon,but aluminum up to about 0.8%is sometimes used instead of,or in addition to,silicon,depending on mill processing practice for the desired magnetic1This specification is under the jurisdiction of ASTM Committee A06 onMagnetic Pro
13、perties and is the direct responsibility of Subcommittee A06.02 onMaterial Specifications.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1974.Last previous edition approved in 2010 as A683/A683M 05(2010).DOI:10.1520/A0683-16.2For referenced ASTM standards,visit the
14、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 State
15、s1 grade.Individual producers will often have different silicon oraluminum contents for a particular grade as a result of intrinsicmill processing procedures.6.1.3 Sulfur content is typically less than 0.025%and isusually lowest in the numbered types representing lowest coreloss.Manganese is typical
16、ly present in amounts between 0.10and0.70%.Phosphorus,copper,nickel,chromium,molybdenum,antimony,and tin are usually present only inresidual amounts except in the higher numbered core-loss typeswhere phosphorus,tin,or antimony up to 0.15%may bepresent.6.1.4 The producer is not required to report chemicalcomposition of each lot except where a clear need for suchinformation has been shown.In such cases,the analyses to bereported shall be negotiated between the producer and user.6.2 Typical Process