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12 CD 4 FF

France AFNOR NF 12CD4FF Iron and steel products. Special steels bars and wire rod for cold forming and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 12CD4FF / 12 CD 4 FF
Category Grade Standard Region/Area Standard Content
Metals 12 CD 4 FF NF A35-564 France Iron and steel products. Special steels bars and wire rod for cold forming

Chemical composition(mass fraction)(wt.%) of the 12 CD 4 FF

Element Min Max Similar
Si 0.1000 0.2500 -
S - 0.0300 -
P - 0.0300 -
Mo 0.1500 0.2500 -
Mn 0.6000 0.9000 -
Cr 0.9000 1.2000 -
C 0.1000 0.1500 -

Mechanical Properties of steel grade 12 CD 4 FF

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)
172 (≥) 833 (≥) 14 23 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade 12 CD 4 FF

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 - -     0.24 -  
555 626 - 33.3 442   -  
187 - 24 33.2   112 443

Heat Treatment of steel grade 12 CD 4 FF

Heat treated : 1692°C - 1882°C

Technological Curves of steel grade 12 CD 4 FF

Cross Reference Table (Equivalent Grade) of 12 CD 4 FF

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