| 摘要 |
PROBLEM TO BE SOLVED: To provide a flux-cored wire for electrogas arc welding for stainless steel, even in the case an extra-thick stainless steel plate is welded, which can obtain a weld metal free from the generation of a fusion defect and undercut in a bevel, having high strength and having high toughness in an extra-low temperature environment. SOLUTION: The flux 11b-cored wire 11 for electrogas arc welding for stainless steel has a composition comprising, per the whole mass of the wire, 22 to 28 mass% Cr, 8 to 12 mass% Ni and 55 to 70 mass% Fe, and in which the content of C is regulated to ≤0.06 mass% and the content of N is regulated to ≤0.05 mass%, and, provided that the contents of Cr, Mo, Ni, C and N are defined as [Cr], [Mo], [Ni], [C] and [N], respectively, the ratio of a Cr equivalent Eq(Cr) to an Ni equivalent Eq(Ni), [Eq(Cr)/Eq(Ni)] calculated from equations: Eq(Cr)=[Cr]+[Mo] and Eq(Ni)=[Ni]+35×[C]+20×[N], is 2.0 to 2.6. COPYRIGHT: (C)2010,JPO&INPIT
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