Ductile and gray iron castings are heat treated in batch furnaces.  Atmosphere treatments include oil quench hardening, normalizing, full annealing, and austempering.  Non-atmosphere treatments include tempering, sub-critical annealing and stress relief.  Finishing treatments include steel shot blasting. 

Atmosphere treatments for carbon steel castings include those for the cast irons, as well as carbon restoration to correct the surface oxidation on critical performance parts.  Atmosphere heat treatments for stainless steel castings vary by material composition.  400 series stainless steel castings are hardened in oil quench atmosphere batch furnaces.  300 series stainless steel castings are solution annealed in water quench atmosphere batch furnaces.

Non-ferrous castings are heat treated in atmosphere and non-atmosphere batch furnaces.  Processes typically include annealing of copper, brass, and bronze parts and solution annealing and age hardening of aluminum parts.  Finishing treatments include glass bead blasting and straightening.