Sun Steel Treating, Inc Since 1958, Sun Steel Treating Inc . has specialized in providing our customers precision and specialty Salt Bath Heat Treatments. Whether it's hardening alloys, carbon steels, tool steels or high speed specialty tools, our engineers know the precise metallurgical processes to apply to your steels with the right heat and quench cycles and the precise temperatures resulting in minimal distortion. Pioneering the use of Plasma Nitriding, Sun Steel trade-marked and registered this pro...