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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)
918 (≥) 619 (≥) 23 21 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

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
32 - -     0.31 -  
812 216 - 43.3 222   -  
556 - 13 22.2   324 111

Heat Treatment of steel grade X 53 CrMnNiNbN 21-9

Heat treated : 1122°C - 1114°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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