AUSTENITIC/FERRITE TWO PHASE STAINLESS STEEL WELDING MATERIAL, AND HIGH CHROMIUM STEEL WELDING METHOD USING IT

摘要

PROBLEM TO BE SOLVED: To provide a welding material and a welding method which do not cause delayed crack even in welding without preheating or post heat treatment.;SOLUTION: This invention relates to a two phase stainless steel welding material to weld a stainless steel including 0.03 wt.% or less C and 727 wt.% Cr, where the product of hydrogen content (Hw, ppm) in the steel of the welding material and the ferrite volume (ω, volume %) of the deposit metal of the welding material is 135 or less. Also, a gas shield arc welding method is provided, wherein the product of the ferrite volume (δw, volume %) of the welding metal part and Hw is adjusted to be 154 or less using the welding material. It is preferable that the welding material includes 0.08% or less C, 1.0% or less Si, 2.5% or less Mn, 0.03% or less P, 0.02% or less S, 18-27% Cr, 5-11% Ni, 4% or less Mo, 2.5% or less W, 0.35% or less N, and the balance of Fe and inevitable impurities.;COPYRIGHT: (C)2001,JPO