What Gas For Stainless Steel Tig Welding. Helium He can be added to increase penetration and fluidity of the weld pool. Nitrogen works as a purge gas on the backside of a TIG weld because it isnt exposed to high arc temperatures.
Smart tig welders scrounge every odd size piece of copper they can get their hands on and keep it in their tool box for backing up welds in all kinds of places. TIG welding works in the presence of inert gases. In TIG welding a non-consumable tungsten electrode is used because it has the highest melting temperature among pure metals at 3422 C 6192 F and therefore doesnt contaminate the weld by introducing traces of the electrodes element.
Nitrogen is sometimes used as a purge gas when TIG welding stainless steel.
For instance the addition of hydrogen gives a similar but much stronger. Shielding gases for TIGGTAW welding. For example welding may be required inside a stainless-steel container or in long sections of industrial pipe. It is also used in MIG welding for some applications.