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Tungsten

We tend to associate tungsten with incandescent light bulbs. Pure metallic tungsten is popular for light bulb filaments since it has the highest melting point of all metals. Furthermore, at temperatures above 1650°C, tungsten has high tensile strength. This element is available in various forms, including a dull grey powder, and is resistant to corrosion. However, it must be protected at high temperatures by coating with a heat resistant metal such as thorium.

The most common uses of tungsten are its high temperature applications, including rocket propulsion engines, heating elements, and television tubes. A combination of tungsten with other metals strengthens alloys. As a result, large amounts of this metal are found in drilling and cutting tools.