C.S. to S.S. welding

Date 04-24-2007 16:02

75/25 will work just fine. There will be active gas (and CO2 is an active gas)reactions with the CO2 and the SS(309) that will be deleterious to the SS. But the other side of the joint is CS. So does it matter?

By Richard V. Roch (**)

Date 04-24-2007 16:06

Are there any disadvantages using the tri-mix? Would it pose any problems.

By js55

Date 04-24-2007 16:11

Cost more than anything. Metallurgically the Tri Mix is fine. The Tri mix will look and sound different (mostly because of the He), and your welders will need to adust a bit. And you'll need to increase your flow a bit to accomodate He's mass, or lack thereof.

By js55

Date 04-24-2007 16:17

WOW. did I have my head up my ........I was thinking short circuit GMAW. But in general its still valid. Stick with 75/25 for FCAW. There is no reason to use a Tri Mix for FCAW of 309. Never done it. Never needed to. Might be interesting though.

By Richard V. Roch (**)

Date 04-24-2007 17:13

Appreciate the replies.
Thanks all

By chuck meadows (***)

Date 04-24-2007 22:05

Stainless steel FCAW is designed to be welded with straight CO2 or if using Ar/CO2 mixture, it is advisable to use at least 20-25% argon and balance CO2. I would not recommend a tri-mix, as that is more towards GMAW instead of FCAW.