Science

Cryogenic treatment of all metal tooling, stamping dies, gun barrels, engine components, brass instruments. To make them more wear resistant. In Wooster, Ohio.

Cryogenic Processing improves the life of your guns, engines, instruments, and tools. Located in Minneapolis, Minnesota, United States.

Temper-Master cryogenic processor manufacturing and tempering. Improves durability and performance of tools, musical instruments, and gun barrels. In Springfield, MO.

Cryogenic processing for racing and many industrial applications, including tools and firearms. Florida.

Cryogenic treatment (deep tempering) for motor sports, firearms, softball bats, golf clubs, and musical instruments. In Decatur, IL.

Provider of Nitrofreeze Cryogenic Treatment services for metal treatment as well as cryogenic deflashing and deburring for industrial, commercial and recreational applications. Application Notes and Technical Articles on cryogenics. Located in Worcester, MA.

Cryogenics International manufactures deep cryogenic treatment systems and provides cryogenic processing for automotive racing engines, tools, musical instruments, etc. In Scottsdale, AZ

Computer-controlled cryogenic processing and heat treating services that enhance steel performance for tooling, motor sports, knives, and firearms. Site also explains the science supporting cryogenic processing. In Driftwood TX.

Machine tool sales and service. Also offers cryogenic treatment of tools to make them last longer. In Waco, Texas.

Article from Wikipedia on how cryogenic processing works.

Offers deep cryogenic processing of most ferrous and non-ferrous materials to increase durability and wear resistance. Explains the process and lists its applications. Located in Suffolk, UK.