jls wrote:
Anybody got any pointers on this. A friend had an aluminum tank
welded and it leaked. He thinks it was because a different aluminum
was used for the welding rod. I dunno. I'm a novice on welding.

This tank has a big dent on top and we may need to drill a hole or two
from the bottom of the pancake-shaped tank to work the dent out. Will
this 5052-0 aluminum get hard and brittle? It's .040 thick. The dent
needs to be worked out because we need an airfoil shape on the top of
the tank, and we lost the desired shape with the big dent which made
the tank's top bulge around the inlet. It's an 18-gallon wing tank.


I've found the 5052 to be very forgiving, as far as work hardening, but
I haven't pushed it very hard.

Look up Ken White's internet site.

http://www.tinmantech.com/index.php

Loads of information there. His glasses for gas welding makes all the
difference. Use lots of flux, and a bigger tip than what you think is
necessary.