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EN 10222-3 Grade X8Ni9: Normalized & Tempered Nickel-Steel for Cryogenic Applications

Low-temperature nickel steel forging for pressure purposes.,The nickel-alloyed cryogenic material X8Ni9, materia number 1.5662 is used in pressure vessel construction. Application for refrigerators, gearbox parts and components in machine and apparatus engineering which are exposed to temperatures up to -200 °C.

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 [-]

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

640 - 840 MPa

Yield strength

20.0 °C

480 - 490 MPa

Thermal

PropertyTemperatureValue

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

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

0.005 - 0.01 %

Vanadium

0.05 %


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    1. EN 10222-3 Grade 12Ni14 – High-Performance Nickel Alloy for Cryogenic Applications
    2. EN 10222-3 X8Ni9: High‑Performance Nickel Alloy for Cryogenic Applications
    3. EN 10028-4 X7Ni9 Cryogenic Nickel Steel – Normalized & Tempered (N+NT)
    4. EN 10222-3 Grade 12Ni14 – Normalized & Tempered Nickel Alloy for Cryogenic Applications
    5. EN 10222-3 Grade 13MnNi6-3: Normalized & Tempered Cryogenic Alloy for Pressure Vessels
    6. EN 10222-3 Grade 15NiMn6: Normalized/Tempered or Quenched/Tempered Nickel Steel
    7. EN 10222-3 X12Ni5: High-Performance Normalized & Tempered Nickel Steel for Low-Temperature Forging
    8. EN 10269 X8Ni9 Normalized & Tempered Steel – Ideal for Low‑Temperature Fasteners and Pressure Vessels
    9. EN 10028-4 Grade X8Ni9: Cryogenic Ni-Alloy Steel (Normalized/Quenched & Tempered)
    10. EN 10028-4 X8Ni9 Cryogenic Steel – Normalized & Tempered for Extreme Low-Temperature Applications