Here is an article I did recently on cryogenics for SAE motorsports engineering:
http://www.motorsportsengineering.sa...-cryogenic.htm
Just do dispell some myths about cryogenic tempering really quick. Cryo-Tempering does not harden the materials, it simply closes the grain sturcture of metals and also reduces the stresses of the materials from initial machining and manufacturing. If any one needs more info give me a call at
1-800-550-2796.
Jeromy