300 Below, Inc.
Cryogenic treatment (deep tempering) for motor sports, firearms, softball bats, golf clubs, and musical instruments. In Decatur, IL.
Indian company offers cryogenic treatment of metals, plastics, automotive components, sporting goods and musical instruments.
Article from Wikipedia on how cryogenic processing works.
Cryogenic Institute of New England, Inc.
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 Cryogenic Systems and Processing
Cryogenics International manufactures deep cryogenic treatment systems and provides cryogenic processing for automotive racing engines, tools, musical instruments, etc. In Scottsdale, AZ
Cryogenics of Indiana
Thermo tempering of metals for maximum performance, durability, and life. In Zionsville, IN.
Temper-Master cryogenic processor manufacturing and tempering. Improves durability and performance of tools, musical instruments, and gun barrels. In Springfield, MO.
Cryotron (Canada) Ltd.
Cryogenic processing of equipment. Has a nicely detailed overview of the company's Vari-Cold cryogenic process and equipment. In Spruce Grove, Alberta, Canada.
Cryogenic Processing improves the life of your guns, engines, instruments, and tools. Located in Minneapolis, Minnesota, United States.
Metal Science Services
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.
Texas Machine-Tool International
Machine tool sales and service. Also offers cryogenic treatment of tools to make them last longer. In Waco, Texas.