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Z20CN21-12Az

Description

France AFNOR Z20CN21-12Az Steel Exhaust Valves and Z20CN21-12Az Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Valve Steel: Z20CN21-12Az
Category Type Steel Grade Standard Country Application
Steel GradesValve Steel Z20CN21-12Az AFNOR France Steel Exhaust Valves
Z12CKNDWNb21-20-20
2.4952
NiFe25Cr20NbTi
2.4955
Fe-Ni36
45SiCr90
45WNiCrl80
53NNiMnCr210
80SiNiCr200
80SiNiMoWCr15

Chemical composition(mass fraction)(wt.%) of the Z20CN21-12Az

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) N(%)
0.15-0.25 0.70-1.30 1.00-1.50 Max 0.040 Max 0.030 20.0-22.0 10.5-12.5 0.15-0.25

Mechanical Properties of steel grade Z20CN21-12Az

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)
464 (≥) 175 (≥) 43 41 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 141

Physical Properties of steel grade Z20CN21-12Az

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
14 - -     0.41 -  
213 435 - 31.3 231   -  
675 - 24 32.2   334 323

Heat Treatment of steel grade Z20CN21-12Az

Heat treated : 1618°C - 1577°C

Technological Curves of steel grade Z20CN21-12Az

Cross Reference Table (Equivalent Grade) of Z20CN21-12Az

Grade Standard Country Application
Z20CN21-12Az AFNOR France Steel Exhaust Valves

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