Welding to the torsion tube

[aston@ultrasw.c]

I am installing Bradley Racing rear sway bar mounts which are welded to the torsion tube.

I have only done a couple of tacks but I am not happy with the welds. When I direct the bead on the torsion tube it hisses/fizzes and sprays metal particles. Also there is a small amount of white ash/residue at the weld.

I am using 030 (ER70S-6) steel rod with 100% CO2 MIG

I did clean up the tube with a 4.5" wire brush but did not grind the surface.

Is the tube an alloy steel that needs a different rod and or shield gas?

Any suggestions?

Cheers!

[TimT]

We usually use MIG when welding to the torsion tube... Sometimes we need to cut the tube for different transmissions, or welding braces to the cage etc..

Shielding gas is usually 75/25 Argon/CO2

Sounds like you need to clean the surface a bit more...

[aston@ultrasw.c]

Originally Posted by TimT

We usually use MIG when welding to the torsion tube... Sometimes we need to cut the tube for different transmissions, or welding braces to the cage etc..

Shielding gas is usually 75/25 Argon/CO2

Sounds like you need to clean the surface a bit more...

Is the surface galvanized?

I think zinc leaves a white residue.

[aston@ultrasw.c]

That was it.....

A light grind to remove the plating and we were back in business.

Thanks

[Flieger]

Yes, that sounds like the zinc was still on there. Be careful with that. The fumes are toxic.