Tungsten is a heavy metal that does not occur in nature in elemental form and must be extracted from minerals and ores. For this reason it was discovered relatively late, in 1783, by the Spanish chemists Fausto and Juan José Elhuyar.
The best known use of tungsten is in light bulbs. It is used in many branches of industry because this metal has an enormously high melting point and is very hard. Tungsten is an important alloying element in metallurgy, but can have both positive and negative effects on the properties of steel. Tungsten reacts with carbon to form tungsten carbide during steel production, which makes this steel very hard and ductile.
Tungsten has a negative effect on scaling resistance.
|Corrosion resistance||No bearing||0|
|Yield strength||Improvement||+ 1|
|Heat resistance||Improvement||+ 3|
|Carbide formation||Improvement||+ 2|
|Wear resistance||Improvement||+ 3|
|Notched Impact Strength||No bearing||0|
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