| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel sheet for can which is suitably applied as a steel sheet for 3-pieces drinking can, and a manufacturing method therefor. SOLUTION: This steel sheet has a composition containing, by mass, 0.0016-0.0050% C,≤0.10% Si, 0.10-0.80% Mn, 0.001-0.020% P, 0.001-0.020% S, 0.005-0.100% Al,≤0.030% N, 0.003-0.030% Nb, 0.0002-0.0050% B and the balance Fe with inevitable impurities, and has≥400 MPa tensile strength in the rolling direction and≥430 MPa tensile strength in the right angle direction of the rolling, and≥15% fracture elongation to the rolling direction and≥10% elongation at break to the right angle direction of the rolling. After hot-rolling, this steel sheet is obtained by applying the primary cold-rolling having 89-93% rolling-reduction ratio and an annealing treatment at 630-790°C and successively, applying the secondary cold-rolling having >10% to 30% rolling-reduction ratio. COPYRIGHT: (C)2010,JPO&INPIT |
