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Z 55 CMN 20.08 Az

France AFNOR NF Z55CMN20.08Az Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Z55CMN20.08Az / Z 55 CMN 20.08 Az
Category Grade Standard Region/Area Standard Content
Metals Z 55 CMN 20.08 Az NF A35-579 France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the Z 55 CMN 20.08 Az

Element Min Max Similar
W - 0.5000 -
Si - 0.2500 -
S - 0.0300 -
P - 0.0400 -
Ni 1.5000 2.7500 -
N 0.2000 0.4000 -
Mo - 0.5000 -
Mn 7.0000 10.0000 -
Cr 19.5000 21.5000 -
C 0.5000 0.6000 -

Mechanical Properties of steel grade Z 55 CMN 20.08 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)
749 (≥) 241 (≥) 21 21 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade Z 55 CMN 20.08 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
24 - -     0.23 -  
144 229 - 33.3 224   -  
913 - 14 12.2   314 122

Heat Treatment of steel grade Z 55 CMN 20.08 Az

Heat treated : 1873°C - 1242°C

Technological Curves of steel grade Z 55 CMN 20.08 Az

Cross Reference Table (Equivalent Grade) of Z 55 CMN 20.08 Az

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