Circle-C is a high cobalt-tungsten steel having unusual red-hardness, and is particularly adapted for high production cutting tools. This datasheet provides information on composition, physical properties, and hardness. It also includes information on forming and heat treating. Filing Code: TS-110. Producer or source: Firth Sterling Corporation. See also CIRCLE C (T-5), Alloy Digest TS-502, October 1990.

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