Tungsten-steel alloys are extremely hard and are made by combining tungsten and steel. They only require a small amount of tungsten compared to the amount of steel used. These alloys are used in many high speed applications such as rocket engine nozzles.

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Tungsten is a resilient steel-gray metal, located in many different ores. While the metal was actually discovered by Carl Wilhelm Scheele in 1781, its many uses weren't discovered until the early decades of the twentieth century. Tungsten carbide has been used in mining and mechanical applications--everything from light-bulb filaments and x-ray tubes to drill bits.

Discovery
Scheele discovered a new acid which could be made from an ore called tungstenite--later known as scheelite. In 1783 Jose and Fausto Elhuyar managed to isolate and extract tungsten from the ore.

The Twenties and the Thirties
Tungsten carbide was used by the German company Osram in place of diamond drawing dies. Cemented carbide was invented and used for the cutting and milling of iron and steel.

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Tungsten rings come in a variety of designs. They're made of tungsten carbide generally and many feature gold overlays or diamond insets. Most are a silver that resembles platinum or white gold but you may also purchase black tungsten rings that may also feature overlays or designs. Tungsten rings are not expensive and may be purchased for as little as $50, as of the date of publication, although the black tungsten rings generally cost more than that.

Conclusion
Tungsten is an extremely durable and cost-efficient way to produce a variety of products. There is probably tungsten in some of the products around you right now. From televisions to race cars to wedding bands, tungsten may be found in many facets of our lives.

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Organ Problems
When tungsten carbide is swallowed, it can lead to loss of appetite, nausea, vomiting and diarrhea. The China Tungsten Industry Association states that "reports outside the [tungsten carbide] industry suggest that ingestion of significant amounts of cobalt has the potential for causing blood, heart and other organ problems."

Reducing Exposure
When working with tungsten carbide, you can reduce your exposure by wearing clothing that covers your skin, including gloves and safety glasses; wearing a respirator or working in a well-ventilated area; cleaning work areas using a vacuum cleaner with a HEPA filter or other system that removes small particles from surfaces and the air; and always washing skin that has been exposed to tungsten carbide thoroughly.

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