Yeah, I definitely need to be educated on the different gases for shielding. I know from my buddy that's a fabrication guy, gases are not cheap and depending on how you are using the machine different gases are better than others. And then I've heard you can use mixtures of them?
C25 will do almost anything steel. Argon is for aluminum. I use tri for stainless. Straight CO2 burns hot and dirty, is cheap, but has it's uses. That's a gross over simplification, but it'll do 99% of the time.
