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Mat.No. 1.0535/DIN C45/AISI 1055

C55 is a medium carbon steel are used when greater strength and hardness is desired than in the 'as rolled' condition. Extreme size accuracy, straightness and concentric combine to minimize wear in high speed applications. Turned, ground and polished. Quenched and subsequently tempered steel for less exacting springs, shafts, bushings, crankshafts, etc.
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  • Mat.No. 1.0535/DIN C45/AISI 1055

  • Osaka

C55 is a medium carbon steel are used when greater strength and hardness is desired than in the “as rolled” condition. Extreme size accuracy, straightness and concentric combine to minimize wear in high speed applications. Turned, ground and polished.

Designation by Standards

Mat. No.DINENAISI
1.0535C45-1055


Chemical Composition (in weight %)

CSiMnCrMoNiVWOthers
0.56max. 0.400.75max. 0.40max. 0.10max. 0.40--(Cr+Mo+Ni)= max. 0.63


Applications
Quenched and subsequently tempered steel for less exacting springs, shafts, bushings, crankshafts, etc.

Physical properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 205
Density [g/cm3]: 7.85

Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 229.


Normalizing

Temperature: 825-865oC.

Hardening
Harden from a temperature of 805-845
oC followed by water or oil quenching.

Tempering
Tempering temperature: 550-660oC.

Mechanical Properties in Quenched+Tempered Condition

Diameter (mm)0.2 % proof stress (N/mm2)Tensile strength (N/mm2)Elongation A5(%)Reduction Z (%)
up to 16540780-9301220
17-40460740-8901430
41-100420700-8501535


Hot forming temperature
1050-850
oC.


Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as it become available.


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