To obtain deep penetration TIG welding by using austenitic stainless steel for an outer shell, containing one or both of metal titanium and metal zirconium in the outer shell and/or in flux and containing a slag agent of a specified composition/specified condition in the flux and constituting the outer shell and the flux part left with one kind or more of specified elements and inevitable impurities.
One kind or both of metal Ti or metal Zr of 0.1-1.6 wt.% in a wire total weight is contained in an outer shell and/or flux, a slag agent, which essentially contains one or both of 0.2-1.4% Ti oxide and Zr oxide, one or both of 0.3-2.8% Cr oxide and Mo oxide, 0.05-0.3% silicon oxide, 0.1-0.5% iron oxide, 0.1-0.5% metal fluoride, is contained in the flux. Furthermore, the conditions to be satisfied include the ratio of a quantity of (metal Ti + metal Zr)/the quantity of (Ti oxide + Zr oxide + Cr oxide + Mo oxide)=0.1-1.5, and the quantity of (Ti oxide + Zr oxide + Cr oxide + Mo oxide)>a quantity of (silicon oxide + iron oxide + metal fluoride).
SAKATA KENTARO
YAMAMOTO EIICHI
YAMAMOTO HIROSHI
KOJIMA IKUO
OKANIWA TADASHI
OKAZAKI TSUKASA
HIRAI HIDEO
NOF CORP