Characteristic

Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively combined with other elements in chemical compounds rather than alone. Its important ores include wolframite and scheelite.

Phase at STP：solid

Appearance：grayish white, lustrous

Melting point：3695 K (3422 °C, 6192 °F)

Boiling point：6203 K (5930 °C, 10706 °F)

Density (near r.t.)：19.3 g/cm³

when liquid (at m.p.)：17.6 g/cm³

Heat of fusion：52.31 kJ/mol

Heat of vaporization：774 kJ/mol

Molar heat capacity：24.27 J/(mol·K)

Application

Approximately half of the tungsten is consumed for the production of hard materials – namely tungsten carbide – with the remaining major use being in alloys and steels. Less than 10% is used in other chemical compounds. Because of the high ductile-brittle transition temperature of tungsten, its products are conventionally manufactured through powder metallurgy, spark plasma sintering, chemical vapor deposition, hot isostatic pressing, and thermoplastic routes. A more flexible manufacturing alternative is selective laser melting, which allows creating complex three-dimensional shapes.

Tungsten_MSDS.pdf