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Z 20 CN 21-12 Az

France AFNOR NF Z20CN21-12Az Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Z20CN21-12Az / Z 20 CN 21-12 Az
Category Grade Standard Region/Area Standard Content
Metals Z 20 CN 21-12 Az NF A35-579 France Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the Z 20 CN 21-12 Az

Element Min Max Similar

Mechanical Properties of steel grade Z 20 CN 21-12 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)
469 (≥) 724 (≥) 34 22 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade Z 20 CN 21-12 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 - -     0.42 -  
743 714 - 21.3 333   -  
446 - 13 42.2   233 412

Heat Treatment of steel grade Z 20 CN 21-12 Az

Heat treated : 1599°C - 1125°C

Technological Curves of steel grade Z 20 CN 21-12 Az

Cross Reference Table (Equivalent Grade) of Z 20 CN 21-12 Az

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