Understanding the Value of Vacuum Solution Annealing and Homogenization at ThermTech

At ThermTech, we pride ourselves on our cutting-edge capabilities in solution annealing and homogenization of various steel components, ensuring that they adhere to the rigorous standards of AMS 2769. Our expertise goes beyond just standard processes. Here’s what makes our approach unique:

Advanced Equipment & Capacity:

  • We perform solution annealing and homogenization of stainless steel castings in our specialized vacuum furnaces.
  • Our largest furnace dimensions are 36″ wide x 32″ high x 72″ long, boasting a weight capacity of 10,000 pounds.

High-Pressure Quenching:

Leveraging the high-pressure quenching capabilities of our furnaces, we mimic the liquid quench rates essential for an adequate solution anneal. This process amplifies the corrosion resistance of parts, making them particularly suitable for service in the food or chemical industries.

Minimal Oxidation Benefits:

Our methodology is especially valuable for impellers and pump units. The reduced oxidation on internal surfaces means faster and more affordable clean-up for our customers.

Expertise in Diverse Materials:

  • If you’re working with precipitation hardening steels like 15-5, 17-4, or 17-7 stainless steel or even super-alloy steels such as Inconel or Hastelloy, our vacuum solution annealing ensures the parts are optimally conditioned for subsequent age hardening or enhanced corrosion resistance.
  • We also process exotic materials like titanium and molybdenum dies with the utmost precision.

Understanding Annealing Varieties:

  • Subcritical Annealing: A cost-effective choice that yields relatively low hardness and minimal internal stresses due to its short cycle times.
  • Full Annealing: Though more time-consuming and costly, it ensures low hardness and stress-free results.
  • Spherodize Anneal: A specialized process tailored for alloys like AISI 52100, resulting in a microstructure of ferrite and spheroidal iron carbide for minimized final hardness.


  • Given the lengthy nature of full annealing and spherodize annealing, it’s vital to factor them into your timelines. Choosing the right annealing process is crucial for cost efficiency. Therefore, we recommend discussions with our experts before placing an order to ensure optimal outcomes.

Through our specialized processes and vast experience, ThermTech remains at the forefront of solution annealing and homogenization services, always prioritizing the technical benefits, cost efficiency, and needs of our clients.

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.