Jennifer Bourn. This post is part of the Color Meaning Blog Series, detailing the meanings associated with colors such as red, orange, yellow, green, blue, purple, grey, black, white, brown, pink, turquoise, gold, silver, and beige.
The effect of replacing argon by nitrogen was investigated for the purÂ­pose of reducing welding costs. The study reveals that nitrogen can very well be used to replace argon for purging in pipe welding without any adverse effects on the properties of the unstabilized austenitic stainless steels.
If you use flux core wire, there is no need for shielding gas. However with flux core wire, you can only weld mild steel. Flux core wire can be used on any MIG welder, you just have to have the polatity reversed than you would for if you were welding with shielding gas.