| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for gas shield arc welding which is favorable in welding workability, and can obtain a molten metal which is favorable in low-temperature toughness even if a Ni-content is not higher than 1 mass%, at any time of either after heat treatment or left as welded.SOLUTION: A flux-cored wire in which flux is filled into a steel-made outer coat has a composition which contains, per wire total mass, 0.01 to 0.12 mass% of C, Si of not less than 0.05 mass% and less than 0.30 mass%, 1.0 to 3.5 mass% of Mn, Ni of not less than 0.1 mass% and less than 1.0 mass%, 0.10 to 0.30 mass% of Mo, 0.1 to 0.9 mass% of Cr, 4.5 to 8.5 mass% of TiO, 0.10 to 0.40 mass% of SiO, 0.03 to 0.23 mass% of AlO, and 80 mass% or more of Fe.SELECTED DRAWING: None |
