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France AFNOR NF 20NC2 Non standardized steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 20NC2 / 20 NC 2
Category Grade Standard Region/Area Standard Content
Metals 20 NC 2 -- France Non standardized steels

Chemical composition(mass fraction)(wt.%) of the 20 NC 2

Element Min Max Similar
Si 0.1000 0.4000 -
S - 0.0350 -
P - 0.0400 -
Ni 0.5000 0.7000 -
Mn 0.4000 0.7000 -
Cr 0.5000 0.7000 -
C 0.1800 0.2300 -

Mechanical Properties of steel grade 20 NC 2

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)
716 (≥) 445 (≥) 11 44 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade 20 NC 2

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
41 - -     0.34 -  
566 542 - 42.3 323   -  
723 - 31 44.2   222 412

Heat Treatment of steel grade 20 NC 2

Heat treated : 1681°C - 1157°C

Technological Curves of steel grade 20 NC 2

Cross Reference Table (Equivalent Grade) of 20 NC 2

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