[ctlikon0712]

Depending on the Aluminum alloy you heat treat it to a T-3 or T-4 condition by taking an O condition up to around 500Deg. F for 30 to 40 min, then water quench. This makes it harder. To Age it to a T-6 condition it goes up to 900 to 1000 deg. for 6 to 10 hours depending again on the alloy, and allow to air cool. This is what I did for 5 years working for McDonnell Douglas in Florida. I never did stainless steel.