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France AFNOR NF 22N8 Non standardized steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 22N8 / 22 N 8
Category Grade Standard Region/Area Standard Content
Metals 22 N 8 -- France Non standardized steels

Chemical composition(mass fraction)(wt.%) of the 22 N 8

Element Min Max Similar
Si 0.1000 0.4000 -
S - 0.0350 -
P - 0.0400 -
Ni 1.8000 2.3000 -
Mn 0.2000 0.5000 -
C 0.1800 0.2500 -

Mechanical Properties of steel grade 22 N 8

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)
938 (≥) 794 (≥) 31 41 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade 22 N 8

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 - -     0.13 -  
118 264 - 43.3 433   -  
762 - 21 44.2   424 312

Heat Treatment of steel grade 22 N 8

Heat treated : 1829°C - 1793°C

Technological Curves of steel grade 22 N 8

Cross Reference Table (Equivalent Grade) of 22 N 8

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