Gas info

[Blaze]

My Powertig 250 ex manual states only pure argon or argon helium mix. No co2. My I mig 250 states 75/25 for steel. No pure Argon for steel with the Mig. Does this also mean that pure argon for the Tig for steel would be wrong? I plan on purchasing pure argon to weld aluminum with both machines. However I am hoping I don't need to buy 75/25 for the Mig and argon/helium mix for the Tig to weld steel. That would be 3 different gases and I'm trying to save money and only use two gases if possible. All help appreciated!

[TheGary]

Use straight argon for tig welding, alum, steel, stainless. Use straight argon to mig aluminum, use 75/25 to mig steel. You can use helium or mix with argon to weld alum. if you need more heat but it usually is not needed.

[zoama]

My Powertig 250 ex manual states only pure argon or argon helium mix. No co2. My I mig 250 states 75/25 for steel. No pure Argon for steel with the Mig. Does this also mean that pure argon for the Tig for steel would be wrong? I plan on purchasing pure argon to weld aluminum with both machines. However I am hoping I don't need to buy 75/25 for the Mig and argon/helium mix for the Tig to weld steel. That would be 3 different gases and I'm trying to save money and only use two gases if possible. All help appreciated!

I think you misunderstood. You need 75/25 to mig steel.
You need 100% argon to mig aluminum... or to tig weld most metals.
One bottle of 75/25 and one bottle of 100% argon is all you need.

[Blaze]

Thank you fellas! New guy trying to set up my little shop! I finally got power!