Rhenium: The Ultra‑High‑Density Metal for Filaments and Refractory Applications
Among the highest density element and melting point, rhenium does not have a ductile to brittle transition temperature and does not form carbides. With high resistivity, combined with low vapor pressure, it is an ideal material for filament applications. Excellent resistance to corrosion, resists acid attack and the mechanical effects of electrical erosion. Rhenium has a beneficial effect as an alloying addition with other refractory metals as it greatly enhances the ductility and tensile strength of these alloys.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 21.2 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 483 GPa | |
Elongation | 23.0 °C | 2 % | in 1 in. |
Tensile strength | 20.0 °C | 1380 MPa | |
500.0 °C | 930 MPa | ||
1000.0 °C | 480 MPa | ||
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 6.8E-6 1/K |
Melting point | 3180 °C | |
Specific heat capacity | 23.0 °C | 138 J/(kg·K) |
Thermal conductivity | 23.0 °C | 48 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 23.0 °C | 1.35E-7 Ω·m |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Rhenium | 99.97 % | min |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Common applications of Rhenium: Mass spectrometer filaments, grid heaters, cathode cups, nuclear reactors, thermocouples | |
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