ThermTech refers to hardening as a process in which the entire alloy or components microstructure is being changed by a thermal process to show an overall increase in the parts mechanical properties which results in a higher hardness than the alloy or component originally had. This typically is done through quenching the parts in liquid or by aging them at an artificial temperature.

Polymer Quenching

ThermTech is proud to offer polymer hardening of steel castings when a quench faster than standard oil quenching is required. Polymer quench hardening is typically employed on castings made from low to medium alloy steel grades and sometimes for higher alloy steels with heavy sections.

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Water Quenching

It is optimum for forgings to receive proper water quench hardening in order to avoid undesirable microstructural components, which can lead to low hardness, mechanical properties, and failures during service.

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Age Hardening

Age hardening, also known as precipitation hardening is a low temperature heat treating process to increase the strength and mechanical properties of many aluminum alloys.

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ThermTech—Experts in Austempering Stampings, Machined Parts, and Investment Castings

ThermTech, Inc. offers both small and large batch capabilities for austempering steel and iron investment castings. Between our neutral salt bath furnaces and our larger austempering furnaces, we have the capabilities to austemper a wide variety of stamping, machined components, and investment castings. We have run austempering on alloys from 1060 through 4340 to ductile iron machined parts.

Our dedicated team works with you to ensure we meet your specifications. Count on our decades of experience with hardening, tempering, surface heat treatments, vacuum treatments, and annealing. To learn more about our services, please contact us today.

Learn more about austempering and how ThermTech can serve you by watching these videos.

Request a free quote online or call us at 800-752-6917. You can also contact us online for all your austempering and heat treating needs.


    ThermTech’s quality policy is ZERO DEFECTS for all customer products and in all quality management system activities. Through our efforts to continually improve the quality of the work we offer, we’ve been recognized as being able to meet the rigorous quality standards required by several of our major customers. ThermTech is certified for ISO 9001 and AS9100 in both Metal Heat Treat and Metal Finishing.