Different kinds of welding gas are available, each of which is utilized for a specific sort of welding. For example, if you are going to employ tig welding, you will want Argon(Ar) gas to do so. You may add Helium (He) to the weld pool to improve the penetration and fluidity of the joint. You may also utilize an Argon/Helium combination for any type of welding, regardless of the grade. TIG welding gas[url][/url].