Aluminum Brazing Rods

[sanddrag]

Has anyone used Aluminum Brazing rods before? I picked up some cheap Bernz-O-Matic ones at my LHS just to play with. Since it has working temp of 700 degrees F, I was able to melt it with my propane torch. I tried putting together a small piece of 1/8" thick L channel onto some .090 plate and it seemed to work reasonably well. I was able to pull it apart with a couple pairs of pliers and not a whole lot of effort, but it did hold relatively well. I mean, when it was brazed all around, both the plate and the angle bent before I could get it apart.

Anyway, what has been the extent of your success with these. They seem to make the metal "stick" together more than they do "bond" together because you aren't melting the base metal at all.

What I'm getting at is, can an aluminum FRC robot frame be brazed together and hold reliably? Would you need to use a higher temperature rod and torch?

I don't have any experience with brazing, so if anyone else has, please share.