1.4731

France AFNOR 1.4731 Valve Internal Combustion Engines steel (NF-EN 1009-1998) and 1.4731 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Category Type Steel Grade Standard Country Application
Steel GradesValve Steel 1.4731 AFNOR France Valve Internal Combustion Engines steel (NF-EN 1009-1998)
Z53CMNNb21-09-02Az
Z53CMNS21-09Az
Z55CMN20-08Az
Z60CMDVNb21-10Az
Z80CNS20-02
Z85CDV18-02
NC15Fe7TA
NC20TA
X45CrSi9-3
X40CrSiMo10-2
Datasheet for:Steel Grades:Valve Steel:1.4731

Chemical composition(mass fraction)(wt.%) of the 1.4731

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%)
0.35-0.45 2.00-3.00 Max 0.80 Max 0.040 Max 0.030 9.50-11.5 Max 0.50 0.80-1.30

Mechanical properties / Mechanische Eigenschaften / Caracteristiques mecaniques of grade 1.4731

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)
186 (≥) 611 (≥) 32 22 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 213
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
22 - -     0.32 -  
261 251 - 33.3 434   -  
756 - 24 41.2   231 411
Heat treated : 1966°C - 1149°C
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
The material does not have direct Metallography properties.
Directory is being updated.
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
1.4731 DIN Germany
Valve steel
1.4731 AFNOR France
Valve Internal Combustion Engines steel (NF-EN 1009-1998)
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