Tig welding bronze

I have a job coming up that requires me to weld 220 bronze, can I use tig prosses and what polarity, gas, and amp range do I use? It it a smooth arc?

----------------------------------------------

I just looked up the compostion of 220 bronze at this link http://www.sequoia-brass-copper.com/store/220FPU.htm

and it lists 10 percent zinc.

if that is so, this job might be a beast with lots of smoke and outgassing in the puddle.

bronze can sometimes be welded on DCEN like steel but with 10 percent zinc, this stuff might require AC along with a helium argon mix and a preheat.

i dont know for sure if i have ever welded it before because some of the bronze and brass i have done were not identifiable.

it seems like it should be classified as brass instead of bronze with all that zinc.

good luck and thanks for posting
jody