Quote:
Originally Posted by Adeptus_Minor
Why wouldn't you use argon?
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Argon would work. I just thought I remember some Ti welders I knew mentioning they like to use helium for Ti. Helium is not reactive at all while Argon can be slightly more reactive due to a larger electron cloud. As in it is easier for other elements to pull away an electron from Argon which has a larger electron cloud (where electrons are farther away from the nucleus) than it is from helium which has a much smaller one.
But from a macro level such as welding a Ti frame I doubt it matters much.