1、Designation: A664 11A664 14Standard Practice forIdentification of Standard Electrical Steel Grades in ASTMSpecifications1This standard is issued under the fixed designation A664; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、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 practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled
3、 electricalsteels made to specified maximum values of core loss. This practice applies to magnetically soft irons and steel (low-carbon steelsand alloys of iron with silicon, aluminum, and so forth) where a core loss measurement at a stated peak value of alternatinginduction and a stated frequency,
4、such as 15 kG (1.5 T) and 60 Hz, is normally used to grade the material. This practice also applieswhen some other property is specified (or a different induction or frequency, or both) as the limiting characteristic, provided thematerial also meets all the requirements of the ASTM specification.1.2
5、 Individual specifications that are in conformity with this practice are Specifications A677, A683, A726, A876and , andA876A1086.1.3 The values stated in customary (cgs-emu and inch-pound) units are to be regarded as standard. The values given inparentheses are mathematical conversions to SI units w
6、hich are provided for information only and are not considered standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine th
7、e applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A340 Terminology of Symbols and Definitions Relating to Magnetic TestingA677 Specification for Nonoriented Electrical Steel Fully Processed TypesA683 Specification for Nonoriented Electrical Steel, Semip
8、rocessed TypesA726 Specification for Cold-Rolled Magnetic Lamination Quality Steel, Semiprocessed TypesA876 Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed TypesA976 Classification of Insulating Coatings for Electrical Steels by Composition, Relative In
9、sulating Ability and ApplicationA1086 Specification for Thin-Gauge Nonoriented Electrical Steel Fully Processed Types3. Terminology3.1 The terms and symbols used in this practice are defined in Terminology A340.4. Procedure4.1 General Requirements of the Core-Loss-Type DesignationsThe core-loss-type
10、 designations to be used for orderingpurposes and for identification of the shipped material in ASTM specifications for electrical steels shall be a six-characteridentification (for example, 36F145) comprised of the following basic elements:4.1.1 First Two DigitsThe first two digits of the grade des
11、ignation shall represent the nominal decimal thickness of thematerial in millimetres. For instance, the number 36 represents a thickness of 0.36 mm or 0.014 in. Refer to Appendix X1 for therelationship between Electrical Sheet Gauge Number and thickness.1 This practice is under the jurisdiction of A
12、STM Committee A06 on Magnetic Properties and is the direct responsibility of Subcommittee A06.02 on MaterialSpecifications.Current edition approved Oct. 1, 2011May 1, 2014. Published October 2011May 2014. Originally approved in 1972. Last previous edition approved in 20062011 asA6640611.1 . DOI: 10.
13、1520/A0664-11.10.1520/A0664-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM s
14、tandard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all c
15、ases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.2 Code LettersA code letter shall designate the general category of magnet
16、ic material and the standard sampling andtesting practices that apply. The precise conditions of sampling and testing are given in theASTM specification covering each classof material. The code letter to be used and the sampling and testing conditions associated with that letter shall be as in Table
17、 1.4.1.3 Last DigitsThe last three digits of the grade designation shall represent the maximum permissible core loss in watts perpound for the test conditions indicated by the code letter. For instance, the 145 designation on a standardASTM specification usedin conjunction with the Code Letter F rep
18、resents 1.45 W/lb for the maximum value of core loss determined at 15 kG (1.5 T) and60 Hz on an as-sheared Epstein specimen consisting of one half of the strips cut parallel to the rolling direction and the other halfcut perpendicular to the rolled direction.TABLE 1 Code Letters and Sampling and Tes
19、ting ConditionsCode Letter ASTM Specification Class of Material and Core-Loss Testing ConditionsCode Letter ASTM Specification Class of Material and Core-Loss Testing ConditionsD A726 Magnetic lamination steel, semiprocessed, with core-loss value determined at15 kG (1.5 T) and 60 Hz on Epstein speci
20、mensA after a quality development an-neal at 1450F (790C) with a 1-h soak period.D A726 Magnetic lamination steel, semiprocessed, with core-loss value determined at15 kG (1.5 T) and 60 Hz on Epstein specimensA after a quality development an-neal at 1450F (790C) with a 1-h soak period.F A677 Nonorien
21、ted electrical steel, fully processed, with core-loss value determined at15 kG (1.5 T) and 60 Hz on as-sheared Epstein specimens.AF A677 Nonoriented electrical steel, fully processed, with core-loss value determined at15 kG (1.5 T) and 60 Hz on as-sheared Epstein specimens.AS A683 Nonoriented electr
22、ical steel, semiprocessed, with core-loss value determined at15 kG (1.5 T) and 60 Hz on Epstein specimensA after a quality development an-neal at 1550F (845C) with a 1-h soak period, except that the temperature shallbe 1450F (790C) for alloy contents less than 1.3 % silicon plus aluminum.S A683 Nono
23、riented electrical steel, semiprocessed, with core-loss value determined at15 kG (1.5 T) and 60 Hz on Epstein specimensA after a quality development an-neal at 1550F (845C) with a 1-h soak period, except that the temperature shallbe 1450F (790C) for alloy contents less than 1.3 % silicon plus alumin
24、um.T A1086 Thin-gauge nonoriented electrical steel, fully processed, with core-loss value de-termined at 10 kG (1.0 T) and 400 Hz on as-sheared Epstein specimens.AG A876 Grain-oriented electrical steel, fully processed, with core-loss value determinedat 15 kG (1.5 T) and 60 Hz on Epstein specimensB
25、stress-relief annealed usuallyin the range from 1450 to 1550F (790 to 845C) with a 1-h soak period.G A876 Grain-oriented electrical steel, fully processed, with core-loss value determinedat 15 kG (1.5 T) and 60 Hz on Epstein specimensB stress-relief annealed usuallyin the range from 1450 to 1550F (7
26、90 to 845C) with a 1-h soak period.H A876 Grain-oriented electrical steel, fully processed, with core-loss value determinedat 17 kG (1.7 T) and 60 Hz on Epstein specimensB stress-relief annealed usuallyin the range from 1450 to 1550F (790 to 845C) with a 1-h soak period.H A876 Grain-oriented electri
27、cal steel, fully processed, with core-loss value determinedat 17 kG (1.7 T) and 60 Hz on Epstein specimensB stress-relief annealed usuallyin the range from 1450 to 1550F (790 to 845C) with a 1-h soak period.P A876 Grain-oriented electrical steel, fully processed, high permeability, with core-lossval
28、ue determined at 17 kG (1.7 T) and 60 Hz on Epstein specimens,B stress-relief annealed usually in the range from 1450 to 1550F (790 to 845C) with a1-h soak period. Relative peak permeability at 10 Oe (796 A/m) typically exceeds1880.P A876 Grain-oriented electrical steel, fully processed, high permea
29、bility, with core-lossvalue determined at 17 kG (1.7 T) and 60 Hz on Epstein specimens,B stress-relief annealed usually in the range from 1450 to 1550F (790 to 845C) with a1-h soak period. Relative peak permeability at 10 Oe (796 A/m) typically exceeds1880.Q A876 Grain-oriented electrical steel, ful
30、ly processed, high permeability, laser scribed,with core-loss value determined at 17 kG (1.7 T) and 60 Hz on an as-shearedsheet-type test specimen. Relative peak permeability at 10 Oe (796 A/m) typi-cally exceeds 1880.Q A876 Grain-oriented electrical steel, fully processed, high permeability, laser
31、scribed,with core-loss value determined at 17 kG (1.7 T) and 60 Hz on an as-shearedsheet-type test specimen. Relative peak permeability at 10 Oe (796 A/m) typi-cally exceeds 1880.A Test specimen with one half of the strips cut parallel to the rolling direction and the other half cut perpendicular to
32、 the rolling direction.B Test specimen with all strips cut parallel to the rolling direction.A664 1425. Use of Standard Electrical Steel Grade Designations5.1 The standard grade designation, formulated as described herein, shall be used together with the appropriate ASTMspecification to designate sp
33、ecifically the desired material. For instance, a material designated ASTM Specification A876 Type35G066, would signify grain-oriented electrical steel, fully processed, in a thickness of 0.35 mm with a maximum core loss of 0.66W/lb measured at 15 kG (1.5 T) and 60 Hz on Epstein specimens with all st
34、rips cut parallel to the rolling direction, stress-reliefannealed at 1450 to 1550F (790 to 845C) with a 1-h soak period.5.2 The ASTM grade designations for electrical steel shall be assigned only by ASTM. They shall apply only when an ASTMspecification incorporating that grade designation has become
35、 effective through the normal standardizing activities of the Society.The ASTM grade designations shall be used to identify electrical steel grades only when the material so identified complies withthe requirements of the ASTM specification of which the grade designation is a part.6. Keywords6.1 cor
36、e loss; electrical steel; fully processed; grain-oriented electrical steel; identification; laser scribed; magnetic laminationsteel; nonoriented electrical steel; semiprocessedsemiprocessed; thin-gauge electrical steelAPPENDIXES(Nonmandatory Information)X1. ELECTRICAL SHEET GAUGE NUMBERSX1.1 Table X
37、1.1 shows the relationship between Electrical Sheet Gauge Numbers and thickness. This is for information only.TABLE X1.1 Electrical Sheet Gauge NumberElectrical SheetGauge NumberThicknessin. mm16 0.0625 1.5917 0.0560 1.4218 0.0500 1.2719 0.0453 1.1520 0.0375 0.95221 0.0340 0.86422 0.0310 0.78723 0.0
38、280 0.71124 0.0250 0.63525 0.0220 0.55926 0.0185 0.47027 0.0170 0.43228 0.0155 0.39429 0.0140 0.35630 0.0125 0.31831 0.0100 0.254TABLE X1.1 Electrical Sheet Gauge NumberElectrical SheetGauge NumberThicknessin. mm16 0.0625 1.5917 0.0560 1.4218 0.0500 1.2719 0.0453 1.1520 0.0375 0.95221 0.0340 0.86422
39、 0.0310 0.78723 0.0280 0.71124 0.0250 0.63525 0.0220 0.55926 0.0185 0.47027 0.0170 0.43228 0.0155 0.39429 0.0140 0.35630 0.0125 0.31831 0.0100 0.254A664 143X2. USE OF INSULATING COATINGS DESIGNATIONX2.1 In the interest of promoting computerized databases, the electrical steel designation contained i
40、n this practice can becombined with the coatings designation listed in Classification A976 to form an identifying alphanumeric field. The user shouldconsult with the steel producer to verify that the combination is correct since not all coatings are applicable to a given grade ofsteel. Since Classif
41、ication A976 is not a specification, it is not appropriate at this time to specify insulating coating behavior.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advise
42、d that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either re
43、approved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If yo
44、u feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual
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