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France AFNOR NF 45Cr4 Iron and steel. Special structural steels suitable for the manufacture of suspension components and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 45Cr4 / 45 Cr 4
Category Grade Standard Region/Area Standard Content
Metals 45 Cr 4 NF A35-571 France Iron and steel. Special structural steels suitable for the manufacture of suspension components

Chemical composition(mass fraction)(wt.%) of the 45 Cr 4

Element Min Max Similar
Si 0.1000 0.4000 -
S - 0.0250 -
P - 0.0250 -
Mn 0.6000 0.9000 -
Cr 0.8500 1.1500 -
C 0.4100 0.4800 -

Mechanical Properties of steel grade 45 Cr 4

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)
468 (≥) 995 (≥) 42 14 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade 45 Cr 4

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
44 - -     0.13 -  
851 831 - 42.3 133   -  
572 - 11 33.2   134 341

Heat Treatment of steel grade 45 Cr 4

Heat treated : 1194°C - 1971°C

Technological Curves of steel grade 45 Cr 4

Cross Reference Table (Equivalent Grade) of 45 Cr 4

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