STEEL SHEET FOR CANS AND METHOD FOR PRODUCING SAME

摘要

Disclosed is a high-strength high-processability steel sheet for cans, which is characterized by containing, in mass%, 0.070% or more but less than 0.080% of C, 0.003-0.10% (inclusive) of Si, 0.51-0.60% (inclusive) of Mn and the like. The steel sheet for cans is also characterized in that: the average crystal grain size is not less than 5 µm and the elongation rate of crystal grains is not more than 2.0 in a cross section in the rolling direction; the hardness difference, which is obtained by subtracting the average Vickers hardness of the region in a cross section ranging from the surface to 1/8 the sheet thickness from the average Vickers hardness of the region in the cross section ranging from 3/8 the sheet thickness to 4/8 the sheet thickness, is not less than 10 points and/or the difference of the maximum Vickers hardness is not less than 20 points; the tensile strength is not less than 500 MPa; and the elongation at break is not less than 10%. The high-strength high-processability steel sheet for cans is suitable as a material for an easy-open can.