Duffy Co

Founded in 1979, FPM Heat Treating is one of the largest commercial heat treating companies that specializes in a variety of heat treating processes in the United States. It serves clients in the automotive, construction and agricultural equipment industries. The company offers annealing, normalizing, tempering, vacuum hardening, laboratory testing, blast cleaning and stress relieving services. FPM Heat Treating provides batch, continuous belt, vacuum and pusher furnaces. In addition, it specializes in secondary and auxiliary processes. The company also offers plating, black oxide, chemical cleaning and passivating services. It serves over 3,000 individuals in the Greater Midwest area. FPM Heat Treating has locations in Illinois and Wisconsin.

Established in 1976, General Surface Hardening Inc is a commercial heat treater, delevering excellent services and quality to its customers. Based in Chicago, Ill., the firm provides steel heat treating, horseshoeing, tinsmithing, rebabbiting, metal casting, metal finishing, metal cutting, blacksmith, metal heating, metal forging, metal drawing and metal extruding services.

Founded in 1956, Progressive Steel Treating provides heat-treating services to its vast client base. The company serves a wide range of industries that include aerospace, automotive, food, medical and military. Progressive Steel Treating has a vast client list, including Allied Bendix Aerospace, General Motors, Barber-Colman, General Dynamics, Fermi National Laboratory, McDonnell Douglas, Honeywell, Coltec Industries, etc. The company also offers transportation services. Some of its capabilities include batch, vacuum, rotary furnaces and metallurgical lab.