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TIG welding with argon gas backing at root side to avoid oxidation.
The best way to weld austenitic Stainless steel is TIG welding with argon gas backing at root side to avoid oxidation.
Austenitic stainless steel is a poor conductor of heat. The presence of nickel (6 percent to 22 percent) and chromium (16 percent to 26 percent) enhances its corrosion and stain resistance, but these and other elements—often titanium and molybdenum—also cause it to react to heat differently from the way other materials react. Austenitic stainless steel conducts heat at about half the rate of mild steel, but has a much higher rate of thermal expansion when welded.
A manual welding being capable of coping with the variations in penetration due to the differences in sulfur content in different casts of Stainless steel ( less than 0.01%). Automated TIG is good for high sulfur but may cause lack of penetration in low sulfur.
