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Cryogenic liquid/gas spraying from a nozzle

Cryo-tempering System

Expert solutions to help you succeed

Cryogenic treatments of alloy steels have been claimed to significantly increase wear resistance and toughness through the interplay of three effects: completing martensitic transformation of retained austenite, promoting uniform precipitation of fine carbides, and imparting residual stresses. These treatments require specialized equipment that can cool materials with cold nitrogen down to as low as -300°F (-184°C), and warm them to ambient temperature, or in some cases as high as 1200°F (650°C) for tempering. Air Products can provide liquid nitrogen and supply systems for the full range of cryo-tempering applications.

Air Products offers a variety of technical services for cryogenic nitrogen treatment processes. Our applications engineers can work with you to understand your cryo-treating and cryo-tempering needs and help you optimize gas use and meet your demanding product specifications.

Cryo-tempering Solutions and Expertise

Applying innovation and expertise to solve our customers’ problems is a core strength

Meet demanding product specifications

Use cryo-tempering to increase wear resistance and hardness of metallic parts, such as gears, brake rotors, and bearings

Equipment tailored to your specific needs

We can recommend equipment that can meet your demanding specifications

Cryogenic liquid supply

Air Products engineering teams can provide safe and efficient cryogenic piping system designs

Reliable and secure supply

Leading supplier of liquid nitrogen and helium with excellent record of meeting on-time delivery needs

Get in touch with one of our technical experts.

Put Air Products' cryo-tempering and cryogen supply expertise to work for you.

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Ask the Expert

Liang He - Metals Processing R&D Engineer

Liang He

Advanced Materials Processing R&D Engineer, North America

“Why would I want to cryogenically treat tool steels? Does it really affect the microstructure?”
After austenitizing and quenching, tool steels are sometimes subjected to cold treatment at approximately –80°C (-112°F), followed by tempering. Primarily, the cold treatment is done to increase strength, improve dimensional or microstructure stability, and improve wear resistance. These benefits are due to the transformation of retained austenite to martensite. Some studies show that lowering the cold treatment temperature below –100°C (–148°F) does not significantly increase the amount of retained austenite-to-martensite transformation—therefore it does not result in additional benefits. However, other studies show that compared to cold treatment (–80°C/-112°F), cryogenic treatment (–190°C/-310°F) further improves wear resistance.

CRYOGENIC QUENCHING OF STEEL REVISITED

Cryogenic treatments of alloy steels have been claimed to significantly increase wear resistance and toughness through the interplay of three effects: completing martensitic transformation, promoting uniform precipitation of fine carbides and imparting residual stresses.
Air Products technical expert in discussion with a customer

Industrial Gas Audits and Leak Detection Services

Audits and leak detection services can be comprehensive assessments of the entire gas supply system, or specific to gas or process equipment that use the gas.
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