Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types
|Publication Date:||10 October 1998|
|ICS Code (Flat steel products and semi-products):||77.140.50|
1.1 This specification covers the detailed requirements to which the specified grades of flat-rolled, grain-oriented, fully processed electrical steels shall conform. These steels are used primarily in transformer cores operating at moderate to high inductions at commercial power frequencies (50 and 60 Hz).
1.2 These grain-oriented electrical steels are low-carbon, silicon-iron alloys with a silicon content of approximately 3.2 % in which low core loss and high permeability in the direction of rolling have been achieved by appropriate metallurgical processing.
1.3 The electrical-steel grades described in this specification include (1) conventional grain-oriented electrical steel tested at 15 kG [1.5 T] in accordance with Test Method A 343, (2) conventional grain-oriented electrical steel tested at 17 kG [1.7 T] in accordance with Test Method A 343, (3) high-permeability grain-oriented electrical steel tested at 17 kG [1.7 T] in accordance with Test Method A 343, and (4) laser-scribed high-permeability grain-oriented electrical steel tested at 17 kG [1.7 T] in accordance with Test Methods A 804/A 804M.
1.4 The values stated in either customary (cgs-emu and inch-pound) units or SI units are to be regarded separately as standard. The SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance to this specification.