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EN 10269 Grade X8Ni9 – Premium Low‑Temperature Quenched & Tempered Ni‑Alloyed Steel

Low-temperature Ni-alloyed steel for pressure vessel construction, for refrigerators, gearbox parts and components in machine and apparatus engineering which are exposed temperatures up to -200 °C Further application for mounting elements at lower temperatures.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.88 g/cm³

27.0 °C

7.84 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-269.0 °C

205.5 GPa

-200.0 °C

205.2 GPa

-150.0 °C

203.4 GPa

-100.0 °C

201 - 201.4 GPa

-50.0 °C

198.9 GPa

20.0 °C

195 GPa

27.0 °C

195.1 GPa

100.0 °C

190 GPa

200.0 °C

184 GPa

300.0 °C

178 GPa

400.0 °C

170 GPa

Elongation

20.0 °C

18 %

Poisson's ratio

-269.0 °C

0.29 [-]

-200.0 °C

0.29 [-]

-150.0 °C

0.29 [-]

-100.0 °C

0.29 [-]

-50.0 °C

0.29 [-]

27.0 °C

0.29 [-]

Reduction of area

20.0 °C

50 %

Shear modulus

-269.0 °C

80 GPa

-200.0 °C

79.8 GPa

-150.0 °C

79 GPa

-100.0 °C

78.2 GPa

-50.0 °C

77.1 GPa

27.0 °C

75.4 GPa

Tensile strength

20.0 °C

680 - 820 MPa

Yield strength Rp0.2

20.0 °C

575 - 585 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.02E-5 1/K

20.0 °C

1.1E-5 1/K

100.0 °C

1.14E-5 1/K

200.0 °C

1.18E-5 1/K

300.0 °C

1.21E-5 1/K

400.0 °C

1.25E-5 1/K

Max service temperature, long

-200 - 0 °C

Melting point

1316 - 1595 °C

Typical for Nickel Steel

Specific heat capacity

-100.0 °C

442 J/(kg·K)

20.0 °C

464 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

495 J/(kg·K)

300.0 °C

511 J/(kg·K)

400.0 °C

528 J/(kg·K)

Thermal conductivity

-100.0 °C

23.9 W/(m·K)

20.0 °C

30.2 W/(m·K)

100.0 °C

32.8 W/(m·K)

200.0 °C

34.4 W/(m·K)

300.0 °C

34.7 W/(m·K)

400.0 °C

34 W/(m·K)

Thermal diffusivity

20.0 °C

8.3 mm²/s

100.0 °C

8.5 mm²/s

200.0 °C

8.4 mm²/s

300.0 °C

8 mm²/s

400.0 °C

7.3 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

2.51E-7 Ω·m

20.0 °C

3.22E-7 Ω·m

100.0 °C

3.73E-7 Ω·m

200.0 °C

4.4E-7 Ω·m

300.0 °C

5.19E-7 Ω·m

400.0 °C

6.13E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.1 %

Manganese

0.3 - 0.8 %

Molybdenum

0.1 %

Nickel

8.5 - 10 %

Phosphorus

0.02 %

Silicon

0.35 %

Sulfur

0.01 %

Vanadium

0.05 %


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