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Germany DIN X7Ni9 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: X7Ni9 / X 7 Ni 9
Category Grade Standard Region/Area Standard Content
Metals X 7 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 7 Ni 9

Element Min Max Similar
V - 0.0100 -
Si - 0.3500 -
S - 0.0050 -
P - 0.0150 -
Ni 8.5000 10.0000 -
Mo - 0.1000 -
Mn 0.3000 0.8000 -
C - 0.1000 -

Mechanical Properties of steel grade X 7 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)
142 (≥) 127 (≥) 23 14 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade X 7 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
22 - -     0.21 -  
181 685 - 32.3 311   -  
631 - 24 23.2   211 442

Heat Treatment of steel grade X 7 Ni 9

Heat treated : 1894°C - 1364°C

Technological Curves of steel grade X 7 Ni 9

Cross Reference Table (Equivalent Grade) of X 7 Ni 9

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