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
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.15 g/cm³ | Typical for Ductile (Nodular) Cast Iron |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
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
| Property | Temperature | Value | Comment |
|---|---|---|---|
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
| Property | Value |
|---|---|
Carbon | 2.6 % |
Manganese | 4 - 4.5 % |
Nickel | 22 - 24 % |
Phosphorus | 0.08 % |
Silicon | 1.5 - 2.5 % |
Metal
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