C55 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 hi gh speed applications. Turned, ground and polished.
C55 steel Applications
Quenched and subsequently tempered steel for less exacting springs, shafts, bushings, crankshafts, etc.
C55 steel Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 205
Density [g/cm3]: 7.85
C55 steel Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 229.
C55 steel Normalizing
Temperature: 825-865oC.
C55 steel Hardening
Harden from a temperature of 805-845oC followed by water or oil quenching.
C55 steel Tempering
Tempering temperature: 550-660oC.
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