miging stainless
 

i plan to mig some stainless together this weekend for an exhaust need to know if anyone here has sucessfully done it with a mig using 75/25 argon/co2. any pics etc. i heard to use helium but i only have a single bottle and dont want to get helium if i can get by without.

Re: miging stainless
 

c25 is for mild, use either trimix or straight argon

Re: miging stainless
 

Trimix aka"gold gas" is rad as hell. You can run a real nice weld on stainless with the right gas and wire. good luck man

Re: miging stainless
 

oh yeah tri mix is alot easier to weld with than straight argon... but you can use either..

Re: miging stainless
 

DO NOT use 100% helium. The arc will wander so badly that you won't be able to get a good weld made.

Re: miging stainless
 

anybody want to explain exactly what trimix is?

If I go down to my local Airgas will they know what it is?

Re: miging stainless
 

Yes.

Re: miging stainless
 

how thick of a piece of stainless steel can a 110v mig welder (lincoln sp135plus) mig with "trimix"...? dont mean to thread jack, i'm interested in the same thing. can it do exhaust/IC pipes?

Re: miging stainless
 

tri mix is mostly helium with a little argon and a trace of co2

the more co2 you add the more corrosion resistance you loose with stainless. the SS exhaust welds i did on my car using c25 have evidence of rust even though its SS tubing and SS filler

Re: miging stainless
 

just use argon, it'll be fine... also make sure you use the proper wire!