PROBLEM TO BE SOLVED: To provide a wire for welding austenitic stainless steel which can obtain a weld zone of high quality in which uniform corrosion caused by crude sulfuric acid and pitting corrosion caused by residual chloride ions are evaded at a high efficiency.;SOLUTION: The wire for welding austenitic stainless steel having excellent sulfuric acid corrosion resistance and pitting corrosion resistance has a composition containing, by mass, 0.001 to 0.05% C, 0.01 to 1.5% Si, 0.01 to 2.0% Mn, 21.5 to 28.9% Cr, 7.9 to 13.5% Ni, 2.5 to 4.5% Mo, 2.5 to 4.5% Cu and 0.08 to 0.15% N, and in which the content of P is limited to ≤0.03% and S to ≤0.01%, and also satisfying PI=Cr+3.3×Mo+16×N≥35, GI=-Cr+3.6×Ni+4.7×Mo+11.5×Cu≥65 and a Cr equivalent/an Ni equivalent ≥ 1.90, and the balance iron with inevitable impurities.;COPYRIGHT: (C)2004,JPO
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