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X 50 CrMnNiNbN 21-9

EU EN X50CrMnNiNbN21-9 Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals X 50 CrMnNiNbN 21-9 EN 10090 EU Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the X 50 CrMnNiNbN 21-9

Element Min Max Similar

Mechanical Properties of steel grade X 50 CrMnNiNbN 21-9

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)
825 (≥) 616 (≥) 34 41 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade X 50 CrMnNiNbN 21-9

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 -  
928 437 - 13.3 214   -  
737 - 11 43.2   423 411

Heat Treatment of steel grade X 50 CrMnNiNbN 21-9

Heat treated : 1371°C - 1956°C

Technological Curves of steel grade X 50 CrMnNiNbN 21-9

Cross Reference Table (Equivalent Grade) of X 50 CrMnNiNbN 21-9

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