STEEL SHEET FOR SUBMERGED ARC WELDING

摘要

A steel sheet for submerged arc welding, comprising, by mass, 0.03 to 0.09% C, 1.5 to 2.5% Mn, 0.005 to 0.025% Nb, 0.005 to 0.02% Ti, 0.01 to 0.06% Al, 0.0005 or less B, 0.001 to 0.008% N, 0.015% or less P, 0.015% or less S, 0.006% or less O and the balance Fe and impurities. This steel sheet for submerged arc welding exhibits excellent low-temperature toughness in the area bordering the base material and the area close to molten line of HAZ, and also exhibits excellent low-temperature toughness in the base material and welded metal.