Tungsten heavy alloy ( w-ni-fe alloy) is characterized by high sintering density, good strength and plasticity, and certain ferromagnetism. It has good plasticity and machinability, good thermal and electrical conductivity, and excellent absorption of gamma rays or X-rays.

Specific weight: the general density is 16.5-18.75g/cm3;
High strength: tensile strength of 700-1000Mpa;
Strong absorption of rays: 30-40% higher than lead;
Large thermal conductivity: the thermal conductivity of tungsten alloy is 5 times that of die steel;
Small coefficient of thermal expansion: only 1/2-1/3 of iron or steel;
Good conductivity; Because of its good electrical conductivity, it is widely used in lighting and welding industry.
It has good weldability and machinability.

Tungsten heavy alloy is widely used and has become the main tungsten-based heavy alloy with the largest amount. As a general application, such as counterweight, balance hammer, radiation shielding device, etc., are directly used sintered alloy; However, if it is used as an application requiring high mechanical properties, tungsten alloy requires deformation processing and heat treatment to achieve strengthening.