STEEL SHEET FOR CAN AND MANUFACTURING METHOD THEREOF

摘要

A steel sheet for a can having excellent surface properties and a workability, after-work appearance characteristics and high yield features to accommodate complicated can forming, and a manufacturing method thereof, the method comprising the steps of hot rolling a slab containing over 0.005 to 0.1 wt.% of C and 0.05 to 1.0 wt.% of Mn at a finishing temperature of 800 to 1000 DEG C, winding and cold rolling it at 500 to 750 DEG C, continuously annealing the cold rolled product at not lower than a recrystallization temperature and not higher than 800 DEG C and box annealing the resultant product at over 500 DEG C to 600 DEG C for more than one hour, wherein a structure having ferrite as its principal phase and an average grain size of 10 mu m or smaller and containing 0.1 to 1 % in volume of pearite grains of 0.5 to 3 mu m in size is preferred. In addition, to obtain excellent surface properties, the structure preferably contains 0.015 to 0.10 % of Ti, 0.001 to 0.01 % of Al and a total of 0.0005 to 0.01 % of Ca or REM or both with not more than 0.0014 % of S-5x ((32/40)Ca<+>(32/140)REM).