Non Oriented Electromagnetic Steel Sheet And Manufacturing Method Therefor

Abstract: The chemical composition of a base material of this non-oriented electromagnetic steel sheet is, by mass%, 0-0.0050% C, 3.8-4.9% Si, 0.05-1.20% Mn, more than 0.02% and 0.50% or less sol. Al, 0-0.030% P, 0-0.0030% S, 0-0.0030% N, 0% or more and less than 0.0050% Ti, 0% or more and less than 0.0050% Nb, 0% or more and less than 0.0050% Zr, 0% or more and less than 0.0050% V, 0% or more and less than 0.200% Cu, 0% or more and less than 0.500% Ni, 0-0.100% Sn, and 0-0.100% Sb, with the remainder being Fe and impurities. This non-oriented electromagnetic steel sheet satisfies the expressions [4.3=Si+sol. Al+0.5×Mn=5.0], [B50(0°)-B50(45°)=0.16], and [(B50(0°)+2×B50(45°)+B50(90°))/4=1.57], and the tensile strength thereof is 580 MPa or greater.

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