I am certainly not the authority on metalurgy keith, so take what I say with a grain of salt. As long as you don't bring the part to around 800 degrees you will be fine. aluminum conducts and gives up its heat very easily. I always keep my finger on the part, and when I can't keep my there any longer I dunk the part in water and it instantly cools to room temperature. if you can bend the aluminum part with your fingers, yeah you got it way too hot! |