C55 carbon steel is a medium carbon steel is used when greater strength and hardness is desired than in the "as rolled" condition. Extreme size accuracy, straightness and concentricity combine to minimize wear in high speed applications. Turned, ground and polished.
C55 carbon steel Applications
Quenched and subsequently tempered steel for less exacting springs, shafts, bushings, crankshafts, etc.
C55 carbon steel Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 205
Density [g/cm3]: 7.85
C55 carbon steel Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 229.
C55 carbon steel Normalizing
Temperature: 825-865oC.
C55 carbon steel Hardening
Harden from a temperature of 805-845oC followed by water or oil quenching.
C55 carbon steel Tempering
Tempering temperature: 550-660oC.
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