Blown408

iTrader: (4)

How many people have tig welded their chromoly cage? I know some have mig welded theirs, but I was under the impression that chromoly had to be tig welded.

MADMAN

iTrader: (4)

Chromemoly has to be TIG welded per NHRA specs. If you MIG weld it it wont pass inspection.

Carbed4thGen

iTrader: (2)

Y does it need to be TIGed? is the penetration not good enough with a mig?

SSDriver

iTrader: (2)

The weld must be stronger than the material. With a chomemoly cage the steel used in a mig is weaker.

LS1_PNYTAMR

iTrader: (1)

well i wondered the same thing... i have a very nice mig welder.. everyone said i needed a tig..

but ive personally watched/helped a guy weld one in with mig... so im like 100% sure it can be done..

now i dunno if it affects strength in a crash or what not.... but im pretty sure it will hold it in place and get those through tech who are trying to save weight with a chrom. bar without having to buy a tig.....

Magnus

iTrader: (4)

TIG it and be safe.

How much is your safety worth to you?

Carbed4thGen

iTrader: (2)

Can't you use a chromemoly safe metal for the MIG?

smoknta

Most of the time when you tig weld Chrome-moly you are using a mild steel filler wire like ER80S-D2, instead of a chrome-moly filler. If you are going to use a chrome-moly filler you will need to heat treat the metal after welding or it will be to brittle. But heat treating is not necessary with thinner walled materials. Tig welding gives a stronger weld than mig welding becuase you will get greater penetration and you can control the heat input more with tig.

There is a reason that NHRA requires that chrome-moly to be tig welded. Its not just for the fun of it or the way the weld looks. It is becuase it is stronger.

Here is a link for some info on tig welding chrome-moly:
http://www.lincolnelectric.com/knowl...hrome-moly.asp