Ferrotungsten
{{Short description|Alloy of tungsten and iron}}
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| CASNo =12604-57-8
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| EINECS = 603-117-0
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| Appearance = white solid
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Ferrotungsten (FeW) is a ferroalloy, consisting of iron and tungsten.[https://www.americanelements.com/ferro-tungsten Ferro Tungsten] American Elements; accessed 1 march 2019 The metal usually consists of 75%-82% or 70%-75% tungsten.
Applications
Because of its high melting point, ferrotungsten is a robust alloy with applications in aerospace[https://books.google.com/books?id=jiQDAAAAMBAJ Russia's Growing Air Power] Popular Science Jul 1947, page 91: accessed 1 March 2019 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.Lisa A. Corathers et al. [http://minerals.usgs.gov/minerals/pubs/commodity/ferroalloys/myb1-2008-feall.pdf Ferroalloys], USGS 2008 Minerals Yearbook During World War 2, over 21,000,000 lb of Ferro-tungsten and other ferroalloys were shipped to Russia on lend-lease. The cost was more than $12,000,000.
Ferrotungsten comes from rich ore raw materials primarily of wolframite or scheelite.
References
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