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France AFNOR NF CF420N Railway rolling stock. Recommended steels for rolling stock construction. XI : weldable high yield strength micro-alloyed steels with atmospheric corrosion resistance for bodyworks and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: CF420N / CF 420 N
Category Grade Standard Region/Area Standard Content
Metals CF 420 N NF F 80-111 France Railway rolling stock. Recommended steels for rolling stock construction. XI : weldable high yield strength micro-alloyed steels with atmospheric corrosion resistance for bodyworks

Chemical composition(mass fraction)(wt.%) of the CF 420 N

Element Min Max Similar

Mechanical Properties of steel grade CF 420 N

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)
686 (≥) 162 (≥) 21 32 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 142

Physical Properties of steel grade CF 420 N

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 - -     0.14 -  
716 676 - 12.3 113   -  
326 - 23 42.2   411 412

Heat Treatment of steel grade CF 420 N

Heat treated : 1124°C - 1695°C

Technological Curves of steel grade CF 420 N

Cross Reference Table (Equivalent Grade) of CF 420 N

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