| 摘要 |
PROBLEM TO BE SOLVED: To produce a steel sheet for external cylinder of battery, having superior earing characteristic uniform in transverse and longitudinal directions of a steel sheet and also having excellent corrosion resistance in a worked part. SOLUTION: A slab, having a steel composition containing 0.015-0.025% C, 0.010-0.10% sol.Al, >=0.0003% B, 0.03-0.10% Cr, and <=0.0025% N and satisfying 0.3<=(B/N)<=1.2, is hot-rolled at >=860 deg.C finishing temp. and at 540-680 deg.C coiling temp., pickled, cold-rolled at 82-90% cold draft, batch-annealed at 600-700 deg.C, and temper-rolled. |
