Patent ID: 8710405

Claim:
A welding wire for austenitic stainless steel welding, comprising: at least one portion containing, about, C, 0.005 through 0.05%, Si: 0.1 through 1.0%, Mn: 0.1 through 3.5%, Cr: 25.0 through 28.0%, Ni: 16.0 through 23.9%, Mo: 1.6 through 3.0%, Cu: 0.1 through 0.5%, Al: 0.001 through 0.02%, and N: 0.03 through 0.50% in percent by mass with respect to a total mass of the wire in a solid wire, an outer coat, or an outer coat and a flux, and furthermore, limiting P to between about 0.03% to greater than 0% and limiting S to between about 0.005% to greater than 0%, and in a case of a solid wire, limiting O to between about 0.03 to greater than 0%, having a ratio of a Cr equivalent to Ni equivalent (Cr equivalent/Ni equivalent) defined by the following equations (1) and (2) within a range between about 0.85 and 1.2, and a PI value of about 35 or more defined by the following equation (3), the remainder being iron and unavoidable impurities other than P, O, and S: Cr equivalent=Cr+Mol+1.5×Si (1) Ni equivalent=Ni+0.5×Mn+30×C+30×N (N is 0.03% through 0.30%), or Ni equivalent=Ni+0.5×Mn+30×C+19.5×N (N is more than 0.30% and equal to or less than 0.50%) (2) PI value=Cr+3.3×Mo+16×N (N is 0.03% through 0.30%), or PI value=Cr+3.3×Mo+10.4×N (N is more than 0.30% and equal to or less than 0.50%) (3) wherein the Cr, Mo, Si, Ni, Mn, C, and N indicate contents (percent by mass) of the at least one portion.