Tungsten beads are spherical objects made primarily of tungsten, typically from pure tungsten or tungsten alloys. They possess a series of excellent material properties, specifically:
1. High Density: Tungsten has a density as high as 19.25 g/cm3, making it one of the densest metals in nature. This high density allows tungsten beads to have a greater mass for the same volume, making them suitable for applications requiring high weight, such as counterweights, balancing devices, and military ammunition (e.g., tungsten alloy armor-piercing projectiles).
2. High Hardness and Wear Resistance: Tungsten has extremely high hardness, with a Mohs hardness of approximately 7.5-9.5, second only to diamond, and exhibits excellent wear resistance. Tungsten beads can be used to manufacture wear-resistant parts, such as bearings, ball valves, and sandblasting nozzles, maintaining long-term stability even under high-speed friction or impact environments.
3. High Melting Point and High Temperature Resistance: Tungsten has a melting point as high as 3410℃, the highest of all metals, and maintains high strength and hardness even at high temperatures. Tungsten beads are suitable for high-temperature environments, such as high-temperature furnace components and EDM electrodes.
4. Corrosion Resistance: Tungsten exhibits excellent resistance to most acids, alkalis, and corrosive media at room temperature, reacting only with strong oxidizing substances at high temperatures. Tungsten beads can be used in chemical experimental equipment, marine environmental components, medical devices, and other applications requiring corrosion resistance.
5. Low Coefficient of Thermal Expansion: Tungsten has an extremely low coefficient of thermal expansion, resulting in high dimensional stability with temperature changes. Tungsten beads are suitable for precision instruments, optical equipment, semiconductor manufacturing, and other applications where dimensional accuracy must be unaffected by temperature.
6. Environmentally Friendly and Non-Toxic: Tungsten is a non-toxic and environmentally friendly metal, meeting the safety requirements of modern industry. Tungsten beads can replace materials containing toxic metals such as lead and cadmium in safety-sensitive fields such as medical treatment, food processing, and children's toys.
7. Excellent Electrical and Thermal Conductivity: Tungsten possesses good electrical and thermal conductivity, although not as high as copper or silver, it maintains stable performance at high temperatures. Tungsten beads can be used to manufacture heating elements, electronic packaging materials, heat dissipation components, etc.
8. Machinability: Pure tungsten is brittle, but by adding other elements (such as nickel, iron, copper, etc.) to form tungsten alloys, its toughness and machinability can be significantly improved. Tungsten beads can be customized in terms of hardness, density, and toughness, making them suitable for a wider range of industrial applications, such as military protection and sporting goods (e.g., golf club weights).
