摘要 |
Provided is a weld joint with superior CTOD characteristics produced via: a steel plate, as a base, containing 0.03 - 0.09% C, 0.01 - 0.35% Si, 1.3 - 2.0% Mn, 0.012% or less P, 0.0035% or less S, 0.01 - 0.06% Al, less than 0.3% Ni, less than 0.10% Mo, 0.005 - 0.023% Nb, 0.005 - 0.025% Ti, less than 0.0003% B, 0.002 - 0.005% N, 0.0005- 0.0050% Ca, and 0.0030% or less O, wherein the components satisfy a prescribed relationship; and a weld metal containing 0.040 - 0.090% C, 0.1 - 0.8% Si, 1.0 - 2.5% Mn, 0.020% or less Al, 0.1 - 1.0% Ni, 0.05 - 0.50% Mo, 0.005 - 0.050% Ti, 0.0015% or less B, and the balance iron and inevitable impurities. |