FLUX-CORED WIRE FOR 9% Ni STEEL WELDING

摘要

PROBLEM TO BE SOLVED: To provide a flux-cored wire for 9% Ni steel welding where wire productivity such as wire drawability and the like is excellent, the mechanical property and high temperature cracking resistance of a weld metal are excellent and welding workability is good.SOLUTION: In a flux-cored wire for 9% Ni steel welding: a Ni-based alloy skin contains 0.01% or less C; 0.02% or less C, in mass% to the total mass of a wire; 0.1% or less Si; 2-3% Mn; 55-65% Ni; 13-19% Cr; 9-14% Mo; 0.5-2.5% Nb; 0.4-0.6% Ti; 0.5-2.5% TiOconversion value; 0.5-2.5% SiOconversion value; 0.01-0.2% AlOconversion value; 0.05-0.35% total amount of one or two kinds of NaO conversion value and KO conversion value; 0.2-0.8% CaO; 0.3-2.8% F conversion value; 0.1% or less ZrOconversion value; and 5.5-8.5% total of slag forming agents.SELECTED DRAWING: None