Tungsten also known as wolfram, is a chemical element with symbol W and atomic number 74.
- Tungsten and its alloys are widely used for filaments in older style (not energy saving) electric bulbs and electronic tubes.
Tungsten is also used as the filament in halogen tungsten lamps. These lamps use halogens like bromine and iodine to prevent the tungsten filament from degrading and are therefore more energy efficient than standard incandescent light bulbs.
High speed steel (which can cut material at higher speeds than carbon steel), contains up to 18% tungsten.
Tungsten is used in heavy metal alloys because of its hardness and in high-temperature applications such as welding.
Tungsten carbide (WC or W2C) is extremely hard and is used to make drills. It is also used for jewelry because of its hardness and wear resistance.
- Tungsten is considered to be of low toxicity.
Source: Wikipedia, https://en.wikipedia.org/wiki/Tungsten