Uses of Tungsten:

• Tungsten is useful for glass-to-metal seals since the thermal expansion is about the same as borosilicate glass
• tungsten and its alloys are used extensively for filaments for electric lamps, electron and television tubes, and for metal evaporation work
• electrical contact points for car distributors
• X-ray targets
• windings and heating elements for electrical furnaces
• missile and high-temperature applications
• high-speed tool steels and many other alloys contain tungsten
• the carbide is important to the metal-working, mining, and petroleum industries
• calcium and magnesium tungstates are widely used in fluorescent lighting
• tungsten salts are used in the chemical and tanning industries
• tungsten disulphide is a dry, high-temperature lubricant, stable to 500°C
• tungsten bronze and other tungsten compounds are used in paints
• TV tubes (electron tubes)
• Nozzles for the rockets engines, for example, are made from tungsten steel.

All information from Mark Winter's site