| 摘要 |
PURPOSE:To produce a low alloyed steel plate having excellent corrosion resistance, by incorporating the contents of Mn, S and Ti in a Cu-P low alloyed steel plate at specific ratios. CONSTITUTION:A steel ingot as a steel plate used for an automobile steel plate, building material, etc., contg., by weight, 0.001-0.05% C, 0.05-0.35% Mn, <0.5% Si, 0.010-0.25% S, 0.01-0.5% Cu, 0.05-0.1% P, 0.001-0.1% Al with 0.01-0.1% Ti and keeping the relationship of 0.03<[Mn%][S%]/[Ti%]<0.19 among the contents of Mn, S and Ti is produced by executing hot rolling, pickling, cold rolling-electric cleaning and skin pass rolling. The thin plate by the low alloyed steel having the excellent corrosion resistance can be produced in a wetting or drying environment contg. general salt water.
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