Four Specialized Facilities. One Trusted Network.

Certified Heat Treating Facilities

Facilities Engineered for Consistency, Capacity, and Control

With facilities positioned to serve the Chicago–Milwaukee corridor and surrounding regions, Thermal Process Holdings offers regional coverage with national-level capability. Our locations are optimized for efficient logistics, reduced lead times, and responsive service.

Rockford Heat Treaters

Serving the Rockford, Illinois Area for Over 50 Years

Our facility is over 50,000 square feet in size. We offer a full array of processes to meet your heat treating needs and on time demands. 

  • Batch Furnaces
  • Pusher Furnace
  • Tempering Furnaces
  • Metallurgical Lab & Quality Control
  • Pick Up & Delivery
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Hudapack Metal Treating

An elite commercial heat treating resource in the Midwest since 1985.

Founded in 1985, Hudapack Metal Treating, Inc. has grown to become a thriving, three-plant operation and an elite commercial heat treating resource in the Midwest. We take pride in our ability to provide consistent, quality results and excellent customer service.

  • Aluminum Processing
  • Vacuum Processing
  • Induction Fastener Heating
  • Induction Hardening Annealing
  • Atmosphere Carburizing
  • Atmosphere Hardening
  • Gas Nitriding
    Gaseous Nitrocarburizing
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Diamond Heat Treat

The Clear C Solution for a Complete Range of Heat Treating Services

Diamond Heat Treat, Inc. provides a wide spectrum of heat treating services that include:

  • Carburizing
  • Cryogenic / Deep Freezing 
  • Ferritic Nitrocaburizing / Nitempering 
  • Neutral Hardening
  • Nitriding 
  • Tool Steel Processing
  • Vacuum Full Annealing
  • Tempering 
  • Carbonitriding 
  • Normalizing 
  • Stress Relieving
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Certified Excellence

One Standard of Excellence Across Every Facility

While each location brings its own strengths, all Thermal Process Holdings facilities operate under shared quality standards, process controls, and testing protocols. This unified approach ensures customers receive the same level of reliability, consistency, and technical expertise no matter which facility processes their parts.