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This practice covers the procedure for designating standard grades of flat-rolled electrical steels made to specified maximum values of core loss. This practice applies to magnetically soft irons and steel such as low-carbon steels and alloys of iron with silicon, aluminum,and so forth where a core loss measurement at a stated peak value of alternating induction and a stated frequency. This practice also applies when some other property
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1.1 This practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled electrical steels made to specified maximum values of specific core loss. This practice applies to magnetically soft irons and steel (low-carbon steels and alloys of iron with silicon, aluminum, and other alloying elements) where a core loss measurement at a stated peak value of alternating induction and a stated frequency, such as 1.5 T (15 kG) and 60 Hz, is normally used to grade the material. This practice also applies when some other property is specified (or a different induction or frequency, or both) as the limiting characteristic, provided the material also meets all the requirements of the ASTM specification.
1.2 Individual specifications that are in conformity with this practice are Specifications , , , , and .
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and inch-pound) units which 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 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
A677 Specification for Nonoriented Electrical Steel Fully Processed Types
A683 Specification for Nonoriented Electrical Steel, Semiprocessed Types
A726 Specification for Cold-Rolled Magnetic Lamination Quality Steel, Semiprocessed Types
A876 Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types
A976 Classification of Insulating Coatings for Electrical Steels by Composition, Relative Insulating Ability and Application
A1086 Specification for Thin-Gauge Nonoriented Electrical Steel Fully Processed Types
ICS Number Code 77.080.20 (Steels)
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ASTM A664-15, Standard Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top