I've had good luck with copper.
For anything larger than 1/8" to 1/4" I'd use a filler patch.
My 2c
Steve
-----Original Message-----
From: shop-talk-owner@autox.team.net
[mailto:shop-talk-owner@autox.team.net]On Behalf Of Mark Andy
Sent: Wednesday, December 10, 2003 10:38 AM
To: shop-talk@autox.team.net
Subject: copper or brass as a backer for weld filling?
Howdy,
I was talking to a friend yesterday who's a fabricator, and mentioned that
I was going to be starting to do some sheet metal patching work in the
racecar to fill up some of the various holes in the firewall, etc.
He mentioned that I should use a chunk of (copper or brass, I can't
remember) as a backer on holes up to around 3/8" and then I could just
fill them up against that, the weld metal wouldn't stick to the (copper or
brass, I can't remember), and it'd leave one side nice and smooth.
I got some copper and some brass... Which do I use?
Thanks!
Mark
|