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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

PropertyTemperatureValue

Density

23.0 °C

19.3 g/cm³

Mechanical

PropertyTemperatureValue

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

PropertyTemperatureValue

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

PropertyTemperatureValue

Electrical resistivity

23.0 °C

5.28E-8 Ω·m

Chemical properties

PropertyValueComment

Tungsten

99.95 %

min

Technological properties

Property
Application areas

Common applications of Tungsten: Lamp filaments, high temperature furnaces, welding electrodes


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