The high specific gravity tungsten alloy is a tungsten (tungsten content is generally of 80% to 98%), by adding a small amount of Ni, Fe, Cu, Co, Mo, Cr and other elements of the alloy as the base, having a density of up to 15.20 to 18.70 g /cm3, the world has been referred to as a high proportion of alloy or high-density alloy. It is divided into two series: W-Ni-Fe and W-Ni-Cu or even W-Ni-Fe-Cu, In contrast, W-Ni-Fe alloy has better mechanical properties in the defense industry and in all areas of the national economy plays a huge role in the military defense industry is a very important new material, and gradually be extended to civil industry.

High density tungsten alloy with a high-density, high strength, high hardness (affectionately 3 H alloy) and good ductility, electrical conductivity and thermal conductivity, excellent performance and played an important role in the manufacture of arms, and then in defense been widely used in industrial, aerospace and civilian industries (such as electrical industry, drilling industry), high proportion alloy dual-use alloy materials become a concern.