Shielding gas for steel (tig)

[SHORT KID]

I am going to try some scratch start tig and I was wondering if I can use the 75/25 mixture from my mig or do I need 100% Argon? My bottle is empty so I have to get it filled either way. Thanks

 

[CNC Dan]

I am going to try some scratch start tig and I was wondering if I can use the 75/25 mixture from my mig or do I need 100% Argon? My bottle is empty so I have to get it filled either way. Thanks

TIG with C25 Argon/CO2... Not so Good!!

 

[Shield Arc]

You need 100% argon.
Here's what Tig welding on steel with C25 looks like.

 

[SHORT KID]

Thanks S A, nice to see you are around again, didn't see you for a while.