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[martin]

Originally Posted by Blue_Heron

Unfortunately, my knowledge of metallurgy is only enough to get me in trouble. I had metal shop in High School (Stranahan class of '78) and the shop teacher showed us how to spin an ash tray out of aluminum sheet. It became work hardened and he used an oxy-acetylene torch to soften (anneal) it so he could work it some more.

In college, I took scuba to get my PE credits and they told a horror story about someone who had done a fancy baked enamel finish on their scuba tanks and the next time they were filled they exploded because the baking process had annealed the aluminum.

More recently, I read where a manufacturer of aluminum wheels (949 Racing) told a customer that he had voided his warranty by having his wheels powder coated.

So I don't know what temperature it takes to anneal 6061. It probably depends on whether the material was tempered or not. I'd start by asking the manufacturer of the bracket.
Dave

Sounds like your metallurgy is enough to keep you out of trouble lol...yes it was tempured.. I saw on the angle that it was 6061t