Mig welding gas

Argon being inert, each gas having a density, guess a mixing it up wouldn't hurt, anyone?

 

80/20 mix for over 20 yrs now for the mig. 100 argon on the tig.

 

For MIG welding steel, I use 75/25. For MIG welding aluminum, I use Argon. You can MIG weld steel with pure Argon, but the gas costs more, you won't get the penetration of the 75/25.
For the TIG, I use pure Argon for everything.
Buy your own bottles, it is worth the investment.
Weldingtricksandtips, is a youtube site that has excellent information on MIG and TIG welding
http://www.weldingtipsandtricks.com/Mig-welding-tips.html
Bob

 

That's the complete correct answer, boss!!