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X 55 CrMnNiN 20-8

Germany DIN X55CrMnNiN20-8 Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X55CrMnNiN20-8 / X 55 CrMnNiN 20-8
Category Grade Standard Region/Area Standard Content
Metals X 55 CrMnNiN 20-8 DIN EN 10090 Germany Valve steels and alloys for internal combustion engines

Chemical composition(mass fraction)(wt.%) of the X 55 CrMnNiN 20-8

Element Min Max Similar
Si - 0.2500 -
S - 0.0300 -
P - 0.0500 -
Ni 1.5000 2.7500 -
N 0.2000 0.4000 -
Mn 7.0000 10.0000 -
Cr 19.5000 21.5000 -
C 0.5000 0.6000 -
Si - 0.2500 -
S - 0.0300 -
P - 0.0450 -
Ni 1.5000 2.7500 -
N 0.2000 0.4000 -
Mn 7.0000 10.0000 -
Cr 19.5000 21.5000 -
C 0.5000 0.6000 -

Mechanical Properties of steel grade X 55 CrMnNiN 20-8

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)
816 (≥) 896 (≥) 24 31 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade X 55 CrMnNiN 20-8

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
21 - -     0.32 -  
726 979 - 13.3 333   -  
396 - 23 21.2   114 224

Heat Treatment of steel grade X 55 CrMnNiN 20-8

Heat treated : 1214°C - 1886°C

Technological Curves of steel grade X 55 CrMnNiN 20-8

Cross Reference Table (Equivalent Grade) of X 55 CrMnNiN 20-8

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