Method of producing high-strength steel sheet used for can

A method of producing a high-strength steel sheet having excellent workability used for can making, said steel containing phosphorus and having increased strength and decreased reduction characteristics, comprising:

• hot rolling a slab having a composition as defined hereinafter at a temperature within the range of about the Ar.sub.3 transformation temperature of the steel to about 950.degree. C. to provide a rolled steel strip;
• coiling the rolled steel strip at a temperature in the range of about 400.degree. C. to 600.degree. C. to provide a hot-rolled steel strip;
• pickling and cold rolling the hot-rolled steel strip by any usual method to provide a cold-rolled steel strip;
• continuously annealing the cold-rolled steel strip at a temperature higher than its recrystallization temperature;
• and then temper rolling the annealed cold-rolled steel strip;
• wherein said slab comprises:
• C:
• about 0.0005 to 0.01 wt %,
• N:
• about 0.001 to 0.04 wt %,
• the total amount of C and N being about 0.008 wt % or more and at least a majority of the components C and N being present as a solid solution,
• Mn:
• about 0.05 wt % to 2.0 wt %,
• P:
• about 0.03 wt % to 0.15 wt %,
• Al:
• about 0.005 wt % or less,
• O:
• about 0.01 wt % or less, and
• the balance consisting of Fe and impurities.