About Us

Founded in 1997, Diamond Heat Treat, Inc. has become an established leader in the heat treating industry. Since its inception, Diamond has focused on providing customers with answers to their difficult heat treating issues. As a result, Diamond has achieved the reputation of offering metalworking companies the “Clear Cut Solution.”

Furthermore, Diamond Heat Treat was acquired by Thermal Process Holdings in June 2017. This acquisition is the fourth for the investment group and is part of a larger strategy of providing value added services. With Thermal Process Holdings’ ultimate goal of building diversified, technology-leading thermal process companies serving an attractive universe of customers, end markets, and geographies – you can be assured that the same great quality and materials you are accustomed to at Diamond Heat Treat will continue for many years to come. Additionally, Thermal Process Holdings’ acquisition continues the encouragement of a culture that protects the legacy and entrepreneurial spirit of all operating divisions, including Diamond Heat Treat, providing employees with long term career opportunities while continuously striving to achieve operational excellence and growth.

Be sure to check out some of our other divisions to experience the diversity and quality that all of them have to offer:


Our Quality Policy

Diamond Heat Treat is committed to continuously improve quality and delivery to exceed customer expectations. A fleet of trucks is available, providing pick up and delivery service to the Greater Rockford metropolitan area, the Chicago suburbs and Milwaukee.
Call to schedule a pickup: 815.873.1348.