Tungsten - Mechanical Properties and Material Applications

Introduction

Tungsten has high electrical and thermal conductivity, and low vapor pressure at high temperature. It has high meting point compared to all other metallic materials. It is also considered as a good element for high vacuum technology, furnace construction, glass seals, and dimensional stability. It has an ability to absorb radioactive radiation because it has high density. The following datasheet gives an overview of tungsten.

Physical Properties

The physical properties of tungsten are displayed in the following table.
Properties                Metric                      Imperial
Density                   19.27 g/cm³              0.70 lb/in³
Melting point            3410°C                    6170°F

Mechanical Properties
The mechanical properties of tungsten are outlined in the following table.
Properties                     Metric             Imperial
Tensile strength            1725 MPa       250 ksi
Elastic modulus            400 GPa         58000 ksi
Hardness                     300                 300

Fabrication and Heat Treatment

Forming
Before forming, tungsten should be preheated at 675°C (1247°F).

Applications
Tungsten is used in different kinds of furnace and lighting applications due to its high melting temperature. The thermal expansion coefficient value of tungsten is almost same as that of silicon, thus using the tungsten in brazed mounts for silicon diode chips.

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