Chemical properties of tungsten is very stable, the melting point is 3410℃, and the density is19.3 g / cm3 (2.5 times of steel and gold quite), which ranks in the first place of all the metals. The hardness of tungsten is very high, and the corrosion resistance of tungsten is good, it doesn't work with any concentration of acid and alkali at room temperature. In the weapons industry, such as nozzle gun, missile launch tube propellers are made of alloys of tungsten. Moreover, in military, projectile used as armor piercing is made the high density alloy steel, tungsten carbide which is much stiffer than the tank armor.  During the war, the consumption of tungsten often rapidly increases, and its prices increase quickly.  In civilian areas, the high-speed steel of tool material in metal processing field is the alloys containing tungsten. Without tungsten, the metal processing capacity will directly lead to paralysis. In the nuclear engineering, tungsten is used as a container for liquid metal, thermionic converter and so on.
About the importance of tungsten on national security, Zhang Chunming, the executive vice president of Chinese Tungsten Industry, and Liu Liangxian, the Association Secretary General stressed that making a nuclear island needs 50 tons of tungsten, and 50% of the world's nuclear power plants are concentrated in China, the demand potential of tungsten is very huge in the future in the study of China's biggest exchange of tungsten trading and the Transasia nonferrous metal exchange. According to the America geological survey data, the existing global tungsten ore will be mined finished in 23.18 years. China accounted for 62% of the world's supply of tungsten resources, supplies 85% of global tungsten consumption, 62%of resource reserves to supply 85% of consumption is not sustainable. This proportion dropped is a necessary event in the future year by year.
Tungsten is an important military basis material. In military terms, the protection of tungsten is right in any case. The situation in the Middle East shows that war is near, status of tungsten in national security and national economy become more important, so the parties need to care much about tungsten.