STEEL PLATE TO BE PRECIPITATING TIN+MNS FOR WELDED STRUCTURES, METHOD FOR MANUFACTURING THE SAME AND WELDING FABRIC USING THE SAME

摘要

Disclosed is a welding structural steel product having fine complex precipitates of TiN and MnS is provided which containes, in terms of percent by weight, 0.03 to 0.17 % C, 0.01 to 0.5 % Si, 1.0 to 2.5 % Mn, 0.005 to 0.2 % Ti, 0.0005 to 0.1 % A1, 0.008 to 0.030 % N, 0.0003 to 0.01 % B, 0.001 to 0.2 % W, at most 0.03 % P, 0.003 to 0.05 % S, at most 0.005 % O, and balance Fe and incidental impurities while satisfying conditions of 1.2