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EN 13835: GGG‑NiMn 23/4 Cast Iron – High‑Strain, Cryogenic‑Grade Material

GGG NiMn 23 4, material number 0.7673, as GGG NiMn 23 3 also contained in VdTUEV Wbl 376 : 2001-06, possesses a particularly high strain. It is not magnetizable and cold-toughly to -196 °C. Application: Use for cast pieces of the refrigeration technology to -196 °C. According to VdTUEV Wbl 367 : 2001-06 it is for pressure tanks from -196 to 350 °C.

Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

7.15 g/cm³

Typical for Ductile (Nodular) Cast Iron

Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

165 - 180 GPa

Typical for Ductile (Nodular) Cast Iron

Elongation

20.0 °C

25 %

Hardness, Brinell

20.0 °C

150 - 180 [-]

Poisson's ratio

23.0 °C

0.26 - 0.31 [-]

Typical for Ductile (Nodular) Cast Iron

Shear modulus

23.0 °C

63 - 66 GPa

Typical for Ductile (Nodular) Cast Iron

Tensile strength

20.0 °C

440 - 480 MPa

Yield strength

20.0 °C

210 - 240 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

1E-5 - 1.6E-5 1/K

Typical for Ductile (Nodular) Cast Iron

Max service temperature, long

-196 - 350 °C

Melting point

1150 - 1200 °C

Typical for Ductile (Nodular) Cast Iron

Specific heat capacity

23.0 °C

460 - 502 J/(kg·K)

Typical for Ductile (Nodular) Cast Iron

Thermal conductivity

23.0 °C

13 - 42 W/(m·K)

Typical for Ductile (Nodular) Cast Iron

Chemical properties

PropertyValue

Carbon

2.6 %

Manganese

4 - 4.5 %

Nickel

22 - 24 %

Phosphorus

0.08 %

Silicon

1.5 - 2.5 %


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