Tungsten nickel-copper alloy and tungsten nickel-iron alloy due to their differences in performance characteristics, the application field is different:

Tungsten nickel copper alloy application field:

1. Electrical contact material: due to its good conductivity and wear resistance, it is often used for contacts of high voltage switches, relays and other electrical equipment.
2. Electrode material: used as electrode in EDM, electrochemical machining and other fields.
3. Electronic packaging materials: can provide good thermal and conductivity properties, used in the packaging of electronic components.

Tungsten Nickel-iron alloy application field:

1. Aerospace: Manufacturing parts for use in high temperature environments, such as engine parts, turbine blades, etc.
2. Military field: such as armor-piercing core, using its high density and high strength characteristics.
3. Mold manufacturing: used to manufacture high-wear, high-strength molds.
4. Medical devices: such as radioactive shielding components.

To sum up, tungsten nickel copper alloy is more used in electrical and electronic fields requiring electrical conductivity and thermal conductivity, while tungsten nickel iron alloy is mainly used in aerospace, military and other fields requiring high strength, hardness and high temperature resistance.