ASTM A664-99

    Standard Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications

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    1. Scope

    1.1 This practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled electrical and lamination steels made to specified maximum values of core loss. It applies to magnetically soft irons and steel (low-carbon steels and alloys of iron with silicon, aluminum, etc.) where a core-loss measurement at a stated peak value of alternating induction and a stated frequency, such as 15 kG (1.5 T) and 60 Hz, is normally utilized to grade the material. It 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 specification are A677, A677M, A683, A683M, A726, A726M, A840, A840M, A876, A876M.

    1.3 This standard does not purport to address all of the safety problems, 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.

    ASTM Standards

    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


    ICS Code

    ICS Number Code 77.080.20 (Steels)

    UNSPSC Code

    UNSPSC Code 31380000(Magnets and magnetic materials)


    DOI: 10.1520/A0664-99

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