Posted by Chris Case [75.36.32.187] on Monday, March 11, 2013 at 20:16:34 :
In Reply to: Re: Just heat it up and let it cool posted by Arthur on Manhansack-aha-quash-awomack [67.84.143.155] on Monday, March 11, 2013 at 19:22:30 :
Copper and brass get heated red and quenched. Reloaders anneal cartridge mouth by standing them in a cookie pan of water, heat mouth red, and knock it over in the water.
I guess I've never tried to anneal aluminum, but I do know it gets harder with ambient temp cycles. To keep it soft, come is shipped from the mills in dry ice- no temp cycles.