Abstract: A non-oriented silicon steel and a production method are provided. The non-oriented silicon steel is prepared by using the processes of molten iron desulfurization, converter smelting, RH refining, continuous casting, hot rolling, acid tandem rolling, annealing, coating and finishing, and a chemical composition is as follows in mass percent: C?0.003%, S?0.008%, Si: 0.35%+?1, Mn: 0.15-0.25%, P: 0.04-0.06%, Sn: 0.015%+?2, Nb?0.004%, V?0.004%, Ti?0.005%, Mo?0.004%, Cr?0.03%, Ni?0.03%, Cu?0.03%, N?0.003% and the balance of Fe and inevitable inclusions. The non-oriented silicon steel has the iron loss P1.5/50?5.5 W/kg and the magnetic induction intensity B5000?1.75 when having the thickness of 0.5 mm, and desulfurization is not needed in the RH refining process.

Abstract: A high-grade non-oriented silicon steel and a production method are provided. The non-oriented silicon steel includes the following chemical components in percent by mass: 0.002-0.004% of C, not greater than 0.003% of S, 1.4-1.7% of Si, 0.7-0.95% of Mn, not greater than 0.03% of P, 0.015-0.035% of Sn; and 11×([Si]-1.4%)=14×([Mn]-0.7%). In the production method, the heating temperature of a continuous casting billet is 1,120-1,150° C.; the finishing temperature in finish rolling is 890±15° C.; the rolling reduction of the last pass of finish rolling is not less than 30%, the total rolling reduction of the last two passes of finish rolling is not less than 50%, and the coiling temperature is 650±20° C.; normalizing treatment is avoided before acid continuous rolling.