HIGH-STRENGTH METAL SHEET FOR USE IN CANS, AND MANUFACTURING METHOD THEREFOR

There is provided a steel sheet for a can, the steel sheet having a yield strength of 450 MPa or more, and the occurrence of cracking at a slab corner being prevented in a continuous casting process. A method for manufacturing the steel sheet is also provided. The steel sheet contains 0.03%-0.10% C, 0.01%-0.5% Si, 0.001%-0.100% P, 0.001%-0.020% S, 0.01%-0.10% Al, 0.005%-0.012% N, and the balance being Fe and incidental impurities, in which when Mnf = Mn [% by mass] - 1.71 x S [% by mass], Mnf is in the range of 0.3 to 0.6. The steel sheet has microstructures that do not contain a pearlite microstructure. Preferably, the S content is in the range of 0.001% to 0.005%, and/or the Al content is in the range of 0.01% to 0.04%. Solid-solution strengthening using solid-solution strengthening elements such as C and N and solid-solution strengthening and grain refinement strengthening using P and Mn result in a yield strength of 450 to 470 MPa. Furthermore, a reduction in S and/or Al content prevents cracking at a slab corner.