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France AFNOR NF 55C3 Iron and steel. Special structural steels suitable for the manufacture of suspension components and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 55C3 / 55 C 3
Category Grade Standard Region/Area Standard Content
Metals 55 C 3 NF A35-571 France Iron and steel. Special structural steels suitable for the manufacture of suspension components

Chemical composition(mass fraction)(wt.%) of the 55 C 3

Element Min Max Similar
Si 0.1000 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mn 0.7000 1.0000 -
Cr 0.6000 0.9000 -
C 0.5200 0.5900 -

Mechanical Properties of steel grade 55 C 3

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
477 (≥) 748 (≥) 44 44 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade 55 C 3

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
23 - -     0.21 -  
211 643 - 32.3 443   -  
585 - 43 42.2   224 443

Heat Treatment of steel grade 55 C 3

Heat treated : 1637°C - 1467°C

Technological Curves of steel grade 55 C 3

Cross Reference Table (Equivalent Grade) of 55 C 3

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