Welding Setup

[ERASER5]

Originally Posted by lowrollin70gmc

Tig requires 100% argon for steel, otherwise the tungsten will burn up. Old timers have also used helium but argon is cheaper.

Helium make a hotter spark. Not needed on steel. But on aluminum, Helium can make the difference. TIG started as Heli-Arc for welding air plane frames.

Helium is too expensive just to have around the garage though. It is also in short supply now.