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       The strategic metal tungsten is known as a strategic resource because of its extremely important and extensive application in the military especially in the modern military. According to the records, as early as in the age of cold weapons, tungsten has been applied to weapons.
As we all know, steel barrel does not last long. Therefore, tungsten was added to gun steel as early as 1822 in order to extend the service life of the gun, that is, to increase its resistance to the corrosive effects of gunpowder combustion.
By world war I, German ordnance engineers were paying particular attention to tungsten barrels. It is recorded that the Russian and French light machine guns could fire only about 6,000 rounds before they were damaged, while the German light machine guns could fire 15,000 rounds, more than twice as many. Not surprisingly, tungsten production rose sharply during the war. However, this was still not enough to meet the demands of war, especially for Germany, which lacked tungsten resources and needed it badly.
The Germans could not say that they had no vision. After all, they had stockpiled a considerable amount of tungsten ore before the war. However, tungsten ore was used up shortly after the war broke out. Therefore, the military and industrial sectors suffering from no source have a high voice for "tungsten". Fortunately, at this time, German metallurgists remembered a big thing - tungsten can be found in tin smelting waste.
At that time, the tin smelting industry in Germany could not be said to be underdeveloped, so naturally, tin waste residue is "everywhere". So the German military industry made tungsten out of it in case of emergency. Time passed through a century, up to now, the German ordnance industry is still famous in the world. Tungsten steel has been used in all kinds of military equipment. You can also see why tungsten has become one of the most important strategic metals.

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