Tungsten heavy alloy is a kind of alloy material which is on the basis of tungsten (the content of tungsten is about 80% to 98% in general ) and is composed of Ni, Fe, Cu, Co, Mo, Cr, and other elements. The density of tungsten heavy alloy is up to 15.20~18.70g/cm3, it is also known as the high specific gravity or high density alloy material in the world. High specific gravity tungsten alloys are mainly divided into two series: W-Ni-Fe and W-Ni-Cu even W-Ni-Fe-Cu, W-Ni-Fe alloy has better mechanical properties and plays an important role in national defense industry and national economy. It is a very important new material for military industry, and has been promoted to civil industry.
 
 
High specific gravity tungsten alloy has high density, high strength, high hardness (being kindly called 3 H alloy), good ductility, electrical conductivity, thermal conductivity and so on, and has played an important role in the production of weapons. Then in the defense industry, aerospace and civil industries (such as the electrical industry, drilling, etc.) it also has a wide range of applications, high specific gravity of the alloy material has become concerned in the military and civilian industry.