Quote Originally Posted by Itoldyouso
Ok, I called Miller and spoke to a Tig Techician. He says use pure Argon. Only time you would want helium is for really thick stuff, and then you blend that in with Argon.

I called the welding supply back, and the guy there says " I've been a welder for a long time, and a blend is what you want, but if you insist on Argon, I will fill the tank with that." What the heck is the scoop here???

The fellow at your welding supply has TIG welding confused with MIG welding.

The 75/25 blend is used for MIG.

As you have been told and decided to go with; straight argon (or argon/helium mix) is the correct usage for TIG welding.