TIG Shielding Gas

by Ken
(Memphis, TN)

I have just acquired a TIG welder and am learning the process. I would like to keep only one type of shielding gas in my shop and ask what "general purpose" gas would be best - pure 100% Argon, or some blend including either CO2 or Helium.

I will be doing low volume, custom work primarily in milled steel, but would like to have the option to work in Aluminum.

Thanks for the help.

Ken