Overview
Tungsten wire is manufactured from high-purity tungsten or tungsten alloys through processes like powder metallurgy and drawing. It is valued for its exceptional thermal and mechanical properties, making it indispensable in high-temperature and high-stress applications. Due to its high melting point and resistance to deformation, tungsten wire is a preferred material in industries requiring durability under extreme conditions. It is commonly available in diameters ranging from a few micrometers to several millimeters.
Physical and Chemical Properties
Tungsten wire exhibits remarkable properties such as a melting point of 3422°C, the highest among all metals. Its density is 19.3 g/cm³, and it has low vapor pressure at high temperatures, making it ideal for vacuum applications. The wire is chemically resistant to most acids except a mixture of nitric and hydrofluoric acids. It retains its strength at elevated temperatures, unlike many other metals, which tend to weaken or melt.
Main Applications
The primary use of tungsten wire is in incandescent light bulb filaments, where its high melting point ensures longevity. It is also used in electron microscopes, semiconductor equipment, and X-ray tubes due to its excellent electron emission properties. In industrial settings, tungsten wire serves as heating elements in high-temperature furnaces and as electrodes in TIG (tungsten inert gas) welding. Its durability and conductivity make it useful in aerospace and defense applications.
Safety and Storage
Tungsten wire is generally safe to handle but can pose risks if inhaled as dust or fumes during machining. Proper ventilation and personal protective equipment (PPE) such as masks and gloves are recommended. Storage should be in a dry environment to prevent oxidation. Avoid contact with corrosive chemicals, and ensure packaging is sealed to minimize exposure to moisture.
B2B Procurement Guide
When procuring tungsten wire, verify the supplier's quality certifications, such as ISO 9001, and request material test reports for purity and mechanical properties. Diameter tolerance and surface finish are critical for specific applications like electronics. Bulk purchases may offer cost advantages, but ensure the supplier can meet consistent quality standards. Consider logistics, as tungsten is a heavy material, and shipping costs can be significant.
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