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    ASTM A683 - 05(2010)

    Standard Specification for Nonoriented Electrical Steel, Semiprocessed Types

    Active Standard ASTM A683 | Developed by Subcommittee: A06.02

    Book of Standards Volume: 03.04

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    This specification covers the standard requirements for flat-rolled, nonoriented semiprocessed electrical steel intended primarily for commercial power frequency applications in magnetic devices. These electrical steels are low carbon, silicon-iron, or silicon-aluminum-iron alloys, and are classified according to core-loss. Unlike the fully processed electrical steels covered by ASTM A 677, the electrical steels in this specification require heat treatment by the user to develop the specified magnetic properties. The steels covered by this specification have a thickness of either 0.0185 in. (0.47 mm) or 0.025 in. (0.64 mm). For each thickness there are four core loss types. The core loss shall be determined following the use of a quality evaluation anneal listed in the specification. The core loss is determined using the Epstein test method at a test frequency of 60 Hz and a maximum flux density of 15 kG (1.5 T). Test methods to determine other required physical and mechanical properties are listed. Other typical magnetic and physical properties are listed for reference.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers the detailed requirements to which flat-rolled, nonoriented semiprocessed electrical steel shall conform.

    1.2 This steel is produced to specified maximum core-loss values and is intended primarily for commercial power frequency (50- and 60-Hz) applications in magnetic devices. Desirable core-loss and permeability characteristics are developed through heat treatment by the user.

    1.3 These nonoriented, semiprocessed electrical steels are low carbon, silicon-iron or silicon-aluminum-iron alloys containing up to about 2.5 % silicon and less than 1 % aluminum.

    1.4 The values stated in customary (cgs-emu and inch-pound) units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard.

    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

    A664 Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications

    A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment

    A719/A719M Test Method for Lamination Factor of Magnetic Materials

    A720/A720M Test Method for Ductility of Nonoriented Electrical Steel

    A971 Test Method for Measuring Edge Taper and Crown of Flat-Rolled Electrical Steel Coils

    A976 Classification of Insulating Coatings for Electrical Steels by Composition, Relative Insulating Ability and Application

    ICS Code

    ICS Number Code 77.140.50 (Flat steel products and semi-products)

    UNSPSC Code

    UNSPSC Code 31380000(Magnets and magnetic materials)

    Referencing This Standard

    DOI: 10.1520/A0683-05R10

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM A683-05(2010), Standard Specification for Nonoriented Electrical Steel, Semiprocessed Types, ASTM International, West Conshohocken, PA, 2010,

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