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Germany DIN X8Ni9 Flat products made of steels for pressure purposes - Part 4: Nickel alloy steels with specified low temperature properties and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: X8Ni9 / X 8 Ni 9
Category Grade Standard Region/Area Standard Content
Metals X 8 Ni 9 DIN EN 10028-4 Germany Flat products made of steels for pressure purposes - Part 4: Nickel alloy steels with specified low temperature properties

Chemical composition(mass fraction)(wt.%) of the X 8 Ni 9

Element Min Max Similar
V - 0.0500 -
Si - 0.3500 -
S - 0.0200 -
P - 0.0250 -
Ni 8.0000 10.0000 -
Mo - 0.1000 -
Mn 0.3000 0.8000 -
C - 0.1000 -
V - 0.0500 -
Si - 0.3500 -
S - 0.0200 -
P - 0.0250 -
Ni 8.0000 10.0000 -
Mo - 0.1000 -
Mn 0.3000 0.8000 -
C - 0.1000 -
Cr - 0.1000 -
Si - 0.3500 -
S - 0.0100 -
P - 0.0200 -
Ni - 0.0500 -
Mo 8.5000 10.0000 -
Mn 0.3000 0.8000 -
C - 0.1000 -
V - 0.0500 -
Si - 0.3500 -
S - 0.0100 -
P - 0.0200 -
Ni 8.5000 10.0000 -
Mo - 0.1000 -
Mn 0.3000 0.8000 -
C - 0.1000 -

Mechanical Properties of steel grade X 8 Ni 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)
231 (≥) 292 (≥) 43 12 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade X 8 Ni 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
11 - -     0.14 -  
357 432 - 14.3 414   -  
749 - 34 41.2   132 221

Heat Treatment of steel grade X 8 Ni 9

Heat treated : 1614°C - 1616°C

Technological Curves of steel grade X 8 Ni 9

Cross Reference Table (Equivalent Grade) of X 8 Ni 9

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