Nippon Steel Corporation

Masfumi Okamoto

Kiyoshi Tanaka

Takayasu Sugiyama

Minoru Motoyoshi

Tatsuo Oya

A steel slab containing silicon for use as an electrical steel sheet and strip and having no blister occurrence in the final product manufactured by continuous casting, characterized in that said slab comprises 2.5 - 4.0 wt.% of silicon, less than 0.04% of aluminium, less than 3 ppm of hydrogen or less than 3 ppm of hydrogen together with less than 80 ppm of oxygen, and less than [Al(%) .times. 10.sup.3 + 50] ppm of nitrogen, with the remainder being essentially iron.

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Himeji, Japan

Masfumi Okamoto