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Abstract

A method of making electrical steel strip characterized by low core loss and high permeability in the rolling direction includes the steps of: hot rolling a slab into a strip having a composition consisting essentially of (% by weight): up to 0.01 C, 0.20-2.25 Si, 0.10-0.45 Al, 0.10-1.0 Mn, up to 0.015 S, up to 0.006 N, up to 0.07 Sb, up to 0.12 Sn, 0.005-0.1 P, followed by coiling, hot band annealing, cold rolling, batch annealing at a temperature in the range of 1040.degree.-1140.degree. F., and temper rolling to provide the strip with a transfer surface roughness (Ra) of 15 .mu.in or less. Electrical steel is manufactured from the steel strip by punching out shapes into laminations, and final annealing the laminations. The electrical steel has a grain texture including a {110}<001> orientation and a permeability in the range of 5000-65000 (G/Oe) in the rolling direction.

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First Claim