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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.

  • Sacramento, CA 916-925-6100

    Vacuum Processing Engineering, Inc. is best known for several types of Precision Brazing, Diffusion Bonding, Thin Film Coating, Heat Treating and Production of Precision Assemblies. Since its founding in 1976, VPE has established a track record of excellence as both an innovator and as a reliable ISO 9001:2008 certified volume producer of mission-critical assemblies for demanding customers.

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  • Williamston, MI 517-655-4402

    Modern Metal Processing has nearly 30 years of experience, and that shows in the quality of heat treating processes practiced. Our in-house aluminum fabricating abilities allow us to keep the cost of our heat exchangers low, as well as giving us the flexibility to develop unique solutions and new products. Look no further for custom heat exchangers, brazing, and heat treating services.

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  • Londonderry, NH 888-669-3539

    From prototypes to large production runs, MuShield provides unsurpassed quality and service. For example, with every magnetic shield MuShield manufactures, the Company's goal is to attain the maximum shielding capacity for that part while maintaining its structural integrity. MuShield meets these objectives by heat treating parts and material on-site.

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  • Meadville, PA 814-333-1782

    We do vacuum heat treating such as hardening, straighten parts & minimize distortions. We specialize in vacuum heat treating technology & offer a wide range of heat treating choices. At Peters’ Heat Treating, our main concern is on precision parts & has been for over 100 years of combined experience. Some services we offer: vacuum hardening/annealing, vacuum aging, & induction hardening/annealing.

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  • Hayward, CA 510-782-7755

    ThermoFusion has been offering superior heat treating services for more than three decades. A full-service ISO9001-2000 facility, our goal is to work hard, have fun and exceed our customers’ needs and expectations. We have worldwide experience and training and are constantly involved in large, small and development projects. Call or visit our website today, we would love to serve you!

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  • Winchester, KY 859-744-9551

    All of our value-added heat treating is designed to satisfy a number of applications. Our batch hardening furnaces can reach temperatures from 1400 to 2400 °F. We are a turnkey manufacturer which means you will receive your products in a short amount of time. There are numerous benefits to our heat treating services. Please visit our website for more information!

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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.