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Z 50 CMNNb 21-09-02 Az

France AFNOR NF Z50CMNNb21-09-02Az Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals Z 50 CMNNb 21-09-02 Az NF A35-579 France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the Z 50 CMNNb 21-09-02 Az

Element Min Max Similar
W 0.8000 1.5000 -
Si - 0.4500 -
S - 0.0300 -
P - 0.0400 -
Ni 3.5000 5.0000 -
Nb/Ta 1.8000 2.5000 -
N 0.4000 0.6000 -
Mo - 0.5000 -
Mn 8.0000 10.0000 -
Cr 20.0000 22.0000 -
C 0.4500 0.5500 -

Mechanical Properties of steel grade Z 50 CMNNb 21-09-02 Az

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)
854 (≥) 583 (≥) 34 41 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical Properties of steel grade Z 50 CMNNb 21-09-02 Az

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
44 - -     0.44 -  
376 693 - 13.3 112   -  
198 - 14 33.2   313 121

Heat Treatment of steel grade Z 50 CMNNb 21-09-02 Az

Heat treated : 1968°C - 1915°C

Technological Curves of steel grade Z 50 CMNNb 21-09-02 Az

Cross Reference Table (Equivalent Grade) of Z 50 CMNNb 21-09-02 Az

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