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France AFNOR NF C55 淬火和回火钢 - 第2部分:非合金钢的交货技术条件。 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: C55 / C 55
Category Grade Standard Region/Area Standard Content
Metals C 55 NF EN 10083-2 France 淬火和回火钢 - 第2部分:非合金钢的交货技术条件。

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

Element Min Max Similar
Si - 0.4000 -
S - 0.0450 -
P - 0.0450 -
Ni - 0.4000 -
Mo - 0.1000 -
Mn 0.6000 0.9000 -
Cr+Mo+Ni - 0.6300 -
Cr - 0.4000 -
C 0.5200 0.6000 -

Mechanical Properties of steel grade C 55

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)
417 (≥) 758 (≥) 41 41 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical Properties of steel grade C 55

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
32 - -     0.43 -  
916 228 - 24.3 343   -  
421 - 41 13.2   224 214

Heat Treatment of steel grade C 55

Heat treated : 1812°C - 1946°C

Technological Curves of steel grade C 55

Cross Reference Table (Equivalent Grade) of C 55

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