Tungsten: Key Properties and Industrial Applications
Many practical applications of tungsten are based on its high melting point and density and its low vapor pressure. Tungsten is an excellent material for high vacuum technology, dimensional stability, glass seals and furnace construction. In addition, tungsten’s high density gives it a capacity to absorb radioactive radiation. Tungsten has found wide use as additives to steel to enhance physical properties and an alloy with nickel, copper and iron to provide high density machinable materials.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 19.3 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | 23.0 °C | 400 GPa |
Hardness, Vickers | 23.0 °C | 460 [-] |
Tensile strength | 20.0 °C | 1725 MPa |
500.0 °C | 1035 MPa | |
1000.0 °C | 515 MPa | |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 4.2E-6 1/K |
Melting point | 3420 °C | |
Specific heat capacity | 23.0 °C | 134 J/(kg·K) |
Thermal conductivity | 23.0 °C | 173 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 23.0 °C | 5.28E-8 Ω·m |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Tungsten | 99.95 % | min |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Common applications of Tungsten: Lamp filaments, high temperature furnaces, welding electrodes | |
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