Patent ID: 6872469
Filing Date: 2005-03-29
Classification: C22C,C23C,Y10T

Abstract:
1. A galvannealed steel sheet having excellent surface appearance and press formability, characterized in that a steel sheet comprises galvannealed layer at least one surface of the steel sheet, the steel sheet comprising 0.001 to 0.005% by mass of C, 0.010 to 0.040% by mass of Si, 0.05 to 0.25% by mass of Mn, and 0.010 to 0.10% by mass of Sb, and 0.010 to 0.030% by mass of P, wherein, the Si, Mn, and P satisfy the relation 0.030%≦Si+P+Mn/20≦0.070%, and the layer deposits in the amount of 25 to 60 g/m