"dave" wrote in message
news:fC_7g.59150$IZ2.34290@dukeread07...
I need to make a piece of sheet steel .250 thick, roughly postcard sized,
with a square-edged "through-slot" (perforation) in the center of it approx
.0625 wide by .750 long. in my shop, the easiest way would be to weld two
pieces together at both ends, grind flush, and leave the slot 'open' in the
center. can I stick a small sheet or copper in the 'desired open spot' and
expect it to resist the 'buzzbox arc', when I'm using 6011 rod? what about
sheet aluminum? or is there something better?

what'll -resist- the arc temperature, not melt, and stay square? getting
the inside ends square again with a tiny jewelers file could take
hours....

thanks guys for tips and ideas :-)

toolie

I've successfully used copper flatbar for backing up thin metal when mig
welding. Works well, I'm not sure if it will work the way you want - try it!
Ally might "spit" or spatter more than copper.
rob