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X 53 CrMnNiNbN 21-9

Germany DIN X53CrMnNiNbN21-9 Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Category Grade Standard Region/Area Standard Content
Metals X 53 CrMnNiNbN 21-9 DIN EN 10090 Germany Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the X 53 CrMnNiNbN 21-9

Element Min Max Similar
Si - 0.4500 -
S - 0.0300 -
P - 0.0450 -
Ni 3.2500 4.5000 -
Nb+Ta 2.0000 3.0000 -
N+C 0.9000 - -
N 0.3800 0.5000 -
Mn 8.0000 10.0000 -
Cr 20.0000 22.0000 -
C 0.4800 0.5800 -

Mechanical Properties of steel grade X 53 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)
891 (≥) 146 (≥) 14 23 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade X 53 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
34 - -     0.44 -  
476 678 - 33.3 413   -  
456 - 44 31.2   323 114

Heat Treatment of steel grade X 53 CrMnNiNbN 21-9

Heat treated : 1513°C - 1841°C

Technological Curves of steel grade X 53 CrMnNiNbN 21-9

Cross Reference Table (Equivalent Grade) of X 53 CrMnNiNbN 21-9

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