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Heat Treatment Companies

IQS Directory provides an extensive list of heat treatment companies. Utilize our website to review and source heat treatment companies with our easy-to-use features which allow you to locate heat treatment companies that will design, engineer, and provide heat treatment services for your exact specifications. Our request for quote forms make it easy to connect with leading heat treatment companies. View company profiles, website links, locations, phone number, product videos, customer reviews, product specific news articles and other production information. We are a leading manufacturer directory who will connect you with the right manufacturers whether you are looking for salt bath heat treating, vacuum heat treating, or normalizing heat treatment.

  • Gastonia, NC 704-864-0998

    Our name implies what we do. At JF Heat Treating we specialize in heat treating for metal, induction hardening, tempering to soften, aging, quenching, stress relieve, steel heat treating and more. Some of our other services include: shot blasting, peening and cleaning services.

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  • Smiths Creek, MI 586-716-4700

    Our two facilities can handle induction heat treating for your products. Magnum concentrates on controlled hardening of gear-, pin- and shaft-type parts; plus case hardening of depths 1-20+mm. Our Induction Engineering facility also does induction heat treating for production runs. ISO/TS 16949:2002.

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  • Winona, MN 507-452-7231

    Midwest Metal Products offers quality heat treating services such as case and thru hardening, annealing, normalizing, tempering and blue coating. We also provide engineering services, grinding services and foundry services. Cost effective services and quality finished products. Call us today!

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  • Detroit, MI 800-632-8005

    Pioneer is a steel service center specializing in stainless, alloy and carbon steel. We also manufacture custom-shaped plate steel. In addition, we offer secondary operations such as heat treating, flame cutting, plasma cutting, and surface finishing. Pioneer provides prompt delivery and cost-effective steel products.

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  • Waterloo, IA 319-232-5221

    Established in 1981, Advanced Heat Treat Corp. (AHT) is a recognized global leader in providing heat treat services and metallurgical solutions. Between locations in Alabama, Iowa and Michigan, AHT offers over 20 surface treatments including trademarked processes UltraGlow® Ion Nitriding, UltraGlow® Induction Hardening, UltraOx®, and more. Quality certifications include ISO 9001:2015, Nadcap Heat Treating, IATF16949:2016, Federal Firearms License, ITAR registered, and more.

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  • South Lyon, MI 877-471-0840

    Sun Steel Treating has specialized in providing our customers precision and specialty Salt Bath Heat Treatments since 1958. Whether Nitriding and hardening alloys, carbon steels, tool steels or high speed specialty tools, our engineers know the metallurgical processes to apply to your steels. Not only the right heat and quench cycles and the precise temperatures, but all with minimal distortion.

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businessIndustry Information

Heat Treatment

Heat treatment is a broad term encompassing a number of thermally involved methods and processes used to modify the physical, mechanical and even chemical properties of industrial materials with the goal of adding hardness or ductility.

Through a series of timed heating and cooling cycles, heat treatment processes such as case hardening and annealing cause a realignment of internal atomic structures and in so doing create application specific parts that are softened or hardened as needed. Both formed parts and raw materials may be treated in this manner. Automotive, construction, military, tool and die, shipping, transportation and aerospace industries among others frequently utilize heat treating to produce parts with heightened capabilities required for harsh industrial applications. Not only hardness and ductility, but also tensile, impact and yield strengths are significantly improved or reduced by variable heat treating procedures. Post-production heat treating also relieves stress and tension that may have been an incidental byproduct of manufacturing processes such as cold-rolling, forging and welding. Although heat treating metals and their alloys such as aluminum, steel, copper and stainless steel are the most predominant applications for heat treatment, specialized technologies are commonly employed to alter the physical and mechanical properties of glasses, ceramics and polymers as well. This energy intensive process is extremely versatile, but must be carefully conducted to reduce the opportunity for mechanical failure due to insufficient heating or cooling.


Heat treatment providers often start by considering the end goal of heat treatment. Rather than request a certain procedure, clients dictate the desired results or requirements for a given part or material. Metallurgists and other heat treatment professionals then determine the operations necessary to produce hardened or softened, flexible or rigid components. Often more than one process is used. With the end goal in mind, clients and engineers look at the microstructure, or internal atomic infrastructure of the material to be treated. Grains or crystallites form a complex lattice, the structure of which is reflected in the properties of the pre-treated material. Heat treatment raises the temperature of these grains to what is known as the critical temperature, the point at which the lattice begins to come undone. The temperature, rate and duration of heating as well as the speed, rate and degree of cooling are then manipulated so as to realign the atoms. In general, fast cooling produced via cooled gas or liquids engulfing the material results in coarse grain which provides excellent strength and rigidity, but may also become brittle. Slow cooling, such as that used in annealing produces small grain structures that have impressive strength but are flexible. While heating and cooling are essential to all heat treatments, additional considerations include chemical restructuring.