NON-ORIENTED ELECTROMAGNETIC STEEL SHEET EXCELLENT IN MAGNETIC CHARACTERISTICS AFTER STRESS RELIEF A

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A non-oriented electromagnetic steel sheet comprises about 0.01 wt% or less of C, greater than about 1.0 wt% and at most about 3.5 wt% of Si, at least about 0.6 wt% and at most about 3.0 wt% of Al, at least about 0.1 wt% and at most about 2.0 wt% of Mn, at least about 2 ppm and at most about 80 ppm of one or more rare earth metals (REM), a maximum content of Ti and Zr being about 15 ppm and 80 ppm, respectively, wherein oxygen on a metal surface layer of the steel sheet is 1.0 g/m2 or less after finish annealing. A method of manufacturing the non-oriented electromagnetic steel sheet is also disclosed. Since the non-oriented electromagnetic steel sheet has desirable mechanical properties resulting from the increased amounts of Si and Al, a high magnetic flux density can be maintained without sacrificing a punching property as well as very low iron loss can be obtained even after stress relief annealing.