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France AFNOR NF 34CD4 Iron and steel. Heat treatable steels for externally threaded fasteners for structural purposes and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 34CD4 / 34 CD 4
Category Grade Standard Region/Area Standard Content
Metals 34 CD 4 NF A35-556 France Iron and steel. Heat treatable steels for externally threaded fasteners for structural purposes

Chemical composition(mass fraction)(wt.%) of the 34 CD 4

Element Min Max Similar
Si - 0.3500 -
S - 0.0300 -
P - 0.0300 -
Mo 0.1500 0.2500 -
Mn 0.6000 0.9000 -
Fe - - -
Cu - 0.3000 -
Cr+Mo+Ni 25.0000 55.0000 -
Cr 0.9000 1.2000 -
C 0.3100 0.3700 -
Al 0.0200 - -

Mechanical Properties of steel grade 34 CD 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)
212 (≥) 333 (≥) 43 42 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade 34 CD 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
12 - -     0.22 -  
536 134 - 44.3 213   -  
967 - 34 21.2   113 214

Heat Treatment of steel grade 34 CD 4

Heat treated : 1761°C - 1645°C

Technological Curves of steel grade 34 CD 4

Cross Reference Table (Equivalent Grade) of 34 CD 4

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