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. Not only the right heat and quench cycles and the precise temperatures, but all with minimal distortion.
In 1981, Sun Steel Treating Inc. pioneered the use of Plasma Nitriding, as a viable surface hardening treatment in this country, developing new equipment, technology, and processes to meet the diverse application needs of modern manufacturing. Trade-marking and registering this process as Ionitriding, Sun continues to lead the field both in capability and quality today.
In addition to these processes, Sun performs Steam Treating services for many applications and has developed IonWear®, a registered trademark process designed to combine the benefits of Ionitriding and steam treating for special components.
Sun offers complete metallurgical services to meet the demanding requirements of our customers. Our staff of experts stand ready to tackle your toughest application.
 We are a proud supporter of Toys for Tots.