AUSTENITE-BASED WELD MATERIAL, AND PREVENTIVE MAINTENANCE METHOD FOR STRESS CORROSION CRACKING AND PREVENTIVE MAINTENANCE METHOD FOR GRAIN BOUNDARY CORROSION USING SAME

摘要

Disclosed is an austenitic welding material which contains C: 0.01 wt% or less, Si: 0.5 wt% or less, Mn: 0.5 wt% or less, P: 0.005 wt% or less, S: 0.005 wt% or less, Ni: 15 to 40 wt%, Cr: 20 to 30 wt%, N: 0.01 wt% or less, O: 0.01 wt% or less, and the balance of Fe and inevitable impurities, wherein the content of B contained as one of the inevitable impurities in the welding material is 3 wt ppm or less, and the total content of C, P, S, N and O in the welding material is 0.02 wt% or less.