Nippon Steel Corporation

Ken-ichi Murakami

Takeshi Kubota

Takashi Morohoshi

Hidekuni Murakami

Tomoji Kumano

Masafumi Zeze

Ryutaro Kawamata

Shinichi Kanao

The present invention provides a non-oriented electrical steel sheet having crystal grains of small diameter and excellent workability before stress relief annealing and having crystal grains of largely grown diameter and excellent iron loss property after stress relief annealing and a method for producing the same, and relates to a low iron loss non-oriented electrical steel sheet excellent in workability, containing, in weight %, 0.010% or less of C, 0.1 to 1.5% of Mn, 0.1 to 4% of Si, 0.1 to 4% of Al, wherein the latter three elements satisfy the formula Si&plus;Mn&plus;Al&lE;5.0%, and 0.0005 to 0.0200% of Mg, or further containing 0.005% or more of Ca, wherein the total amount of Mg and Ca is 0.0200% or less, or further containing 0.005% or more of REM, wherein the total amount of Mg and REM is 0.0200% or less, or further containing 0.005% or more of Ca and REM, wherein the total amount of Mg, Ca and REM is 0.0200% or less, and containing the remainder consisting of Fe and unavoidable impurities.

Low iron loss non-oriented electrical steel sheet excellent in workability and method for producing the same

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Kitakyushu, Japan

Ken-ichi Murakami