High heat resistance with excellent weldability, the ferritic stainless steel welding wire having a high corrosion resistance

摘要

PROBLEM TO BE SOLVED: To provide a welding wire for ferritic stainless steel, which has a welded part having high high-temperature strength and superior intergranular corrosion resistance even under a severe environment, and simultaneously shows superior weldability (hot cracking resistance and welding workability).;SOLUTION: The ferritic stainless steel welding wire includes, by mass%, 0.030% or less C, 0.1-1.0% Si, 1.0% or less Mn, 0.040% or less P, 0.030% or less S, 15.0-25.0% Cr, 0.030% or less N, 1.0-2.5% Mo, 0.2-1.5% Nb, 0.002-0.040% Ti, 0.001-0.005% Al, 0.0001-0.0070% Ca, 0.0001-0.001% Mg, 0.0005-0.020% O and the balance Fe with unavoidable impurities. In addition, in the welding wire, (C+N) is 0.035% or less, (C+N)/(Nb-4Ti)/Si is 0.01-1.30 and (S+5Al+5O+Ca+10Mg) is 0.0090-0.1700.;COPYRIGHT: (C)2014,JPO&INPIT