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The metallic element tungsten is not found free in nature, but in several ores. Tungsten is steel-gray to tin-white in color and, when very pure, can be forged, spun, drawn, and extruded. Impure tungsten is very brittle and difficult to work. Tungsten is very resistant to corrosion and stable in dry air at room temperature. Tungsten's melting point exceeds that of all other metals and it has the lowest vapor pressure. At temperatures over 1650°C, tungsten has the highest tensile strength.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(74W183.85)||Heat of Vaporization||197k-cal/g-atom|
|CAS #||7440-33-7||Atomic Volume||9.53W/D|
|First Ionization Energy||184K-cal/g-mole|
|Boiling Point||5900°C||Covalent Radius||1.30Angstroms|
|Themal Conductivity||0.40cal/cm2/cm/s/°C||Electrical Resistivity @ 25°C||5.6µΩ-cm|
|Specific Heat @ 25°C||0.032cal/g°C||Crystal Structure||Cubic, body centered|
|Heat of Fusion||8.05k-cal/g-atom||Tensile Strength||500,000psi|