[/quote] you are going to have to change gas argon or argon mix for aluminum and 75/25 for mild steel[/quote]

Thanks I am going to follow your directions.

hello, I'm not a pro welder, but I like to learn to weld mild steel and aluminum because I'm restoring an old 1970 Land Rover, I have a Lincoln 175HD pro pak, either may I use 100% Ar to weld mild steel and Aluminum without change bottle gas or what is the better gas 75/25 for mild steel? Thanks for...