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Tungsten

Properties of Tungsten

Tungsten Products

PHYSICAL PROPERTIES

PHASE — Solid
STD ATOMIC WEIGHT — 183.84 g·mol−1
MELTING TEMPERATURE — 3695 K, 3422 °C, 6192 °F
BOILING POINT — 5828 K, 5555 °C, 10031 °F
CRYSTAL STRUCTURE — Body Centered Cubic
ELECTRICAL RESISTIVITY — (20 °C) 52.8 nΩ·m
THERMAL CONDUCTIVITY — (300 K) 173 W·m−1·K−1
THERMAL EXPANSION — (25 °C) 4.5 µm·m−1·K−1

GENERAL PROPERTIES

SYMBOL — W
NUMBER — 74
ELEMENT CATEGORY: — Transition Metals

KEY FACTS

  • Discovered in 1783 by Scheele and Torbern Bergman.
  • Translates to “heavy stone” in Swedish
  • Formerly known as wolframium, hence the periodic symbol W
  • Has the highest melting point of all metals in pure form.
  • Has the lowest coefficient of any pure metals.
  • Very difficult to machine and fabricate

MAJOR APPLICATIONS

  • Light bulb filaments
  • Heating elements in vacuum furnaces
  • Radiation shielding
  • Ballistics
  • Welding applications
  • Alloying agent
  • Electrodes

COMMON ALLOYS

  • Tungsten
  • 90% Tungsten 6% Nickel, 4% Copper
  • 90% Tungsten 7% Nickel, 3% Iron
  • 92.5% Tungsten 5.25% Nickel 2.25% Iron
  • 95% Tungsten 3.5% Nickel 1.5% Copper
  • 95% Tungsten 3.5% Nickel 1.5% Iron
  • 97% Tungsten 2.1% Nickel .9% Iron