Tungsten

Element, chemical symbol W. Gray metal with a very high melting point, 3410°C (6170°F), and high tensile strength. Ductile and malleable, immune to atmospheric influences and all acids but strong alkalis. Extremely pliable. Can be drawn into filament for incandescent bulbs or mixed in a powdered form with carbon and embedded in soft metal (such as cobalt) to produce carbide tools or alloyed within steel to make abrasion-resistant tool and die steels.