Ferrotungsten

Ferrotungsten (FeW) is a ferroalloy, consisting of iron and tungsten.[2] The metal usually consists of 75%-82% or 70%-75% tungsten.

Ferrotungsten
Identifiers
ECHA InfoCard 100.108.319
Properties
Appearance white solid
Melting point 1,650 °C (3,000 °F; 1,920 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Applications

Because of its high melting point, ferrotungsten is a robust alloy with applications in aerospace[3] and making of tungsten-containing steel. Tungsten's unique electrical capabilities has made ferrotungsten useful electron microscopes and in IC chips.

Production

Discovered in 1874, world ferrotungsten production today is dominated by China, which in 2008 exported 4,835 t (gross weight) of the alloy. Ferrotungsten is relatively expensive, with the prices around $31–44 per kilogram of contained tungsten.[4] During World War 2, over 21,000,000 lb of Ferro-tungsten and other ferroalloys were shipped to Russia on lend-lease.[3] The cost was more than $12,000,000.

Ferrotungsten comes from rich ore raw materials primarily of wolframite or scheelite.

References
  1. MSDS 12ga Star Flash Aerial Diversion
  2. Ferro Tungsten American Elements; accessed 1 march 2019
  3. Russia's Growing Air Power Popular Science Jul 1947, page 91: accessed 1 March 2019
  4. Lisa A. Corathers et al. Ferroalloys, USGS 2008 Minerals Yearbook
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