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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)
862 (≥) 477 (≥) 21 13 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

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
22 - -     0.42 -  
129 221 - 21.3 312   -  
482 - 43 31.2   232 443

Heat Treatment of steel grade X 50 CrMnNiNbN 21-9

Heat treated : 1476°C - 1745°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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