Tungsten nickel alloy is an alloy with high melting point, high hardness and high corrosion resistance. Its nickel content is less than 10% or 10% ~ 25%, and the balance is tungsten. Because of its excellent physical and chemical properties, this alloy has found a wide range of applications in many fields. First of all, tungsten-nickel alloy because of its high specific gravity (10.0g/cm³-19.3g/cm³) and excellent mechanical properties, is often used in the manufacture of industrial molds, including but not limited to die-casting molds, tool holders, boring bars and so on. In addition, due to its high hardness and wear resistance, tungsten-nickel alloy is also suitable for the manufacture of armor-piercing projectile cores, riveting heads and switch contacts. 12 Tungsten-nickel alloy is also used in some special requirements because of its non-ferromagnetic and good electrical and thermal conductivity, such as gyroscope rotors, electrical contacts of high-voltage electrical switches, and some electrodes for electrical processing. In addition, tungsten-nickel alloy is also used to manufacture radiation shielding devices, counterweights, counterweights, etc., showing its application potential in protection and balance. 2 In summary, tungsten-nickel alloys play an important role in many fields such as industry, military and scientific research due to their unique physical and chemical properties.