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Tungsten carbide, also known as Widia, is a chemical compound of tungsten and carbon, with the formula WC. This material is renowned for its exceptional hardness and high heat resistance. Owing to these properties, tungsten carbide is widely used in the production of cutting tools, drills, milling cutters, screwdriver bits, and other applications requiring high wear resistance and durability. It is also employed in certain industrial and military applications for its ability to withstand extreme temperatures and heavy abrasion.

Technical notes

- Formula & density: WC, density ≈ 15.7 g/cm³ (close to that of gold).
- Hardness: up to 9 on the Mohs scale, just below diamond (10).
- Melting point: ~ 2,870 °C, suitable for very high-temperature environments.
- Origin of the name “Widia”: derived from the German Wie Diamant (“like diamond”).
- Specific uses: mainly in the cutting tool industry (drills, milling cutters, blades), but also in components exposed to heavy wear.