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Characteristics of tungsten-nickel-iron alloy products

Publication date:

2025-11-06

Author:

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The products of tungsten-nickel-iron alloy (WC-Ni-Fe) They are high-density. The WC-Ni-Fe alloy is based on tungsten (approximately 90–98%) and includes additions of nickel, iron, copper, or other components. The typical nickel-iron ratio is 7:3 or 1:1, although some studies suggest that the optimal Ni/Fe ratio can be increased from 7:3 to 9:1.

Its specific gravity typically ranges from 17.0 to 18.5 g/cm³, and data suggest its density can reach up to 18.8 g/cm³. It exhibits a low coefficient of thermal expansion—approximately 4–6 × 10⁻⁶/°C—roughly half or one-third that of iron or steel. Additionally, it boasts high thermal conductivity, five times greater than that of mold-making steel. The material also demonstrates exceptional strength, with a tensile strength of 700–1000 MPa. Furthermore, it exhibits excellent plasticity and toughness, along with outstanding machinability.

Highly effective at absorbing rays, it exhibits excellent absorption of gamma and X-rays—and its radiation-shielding capability is more than 1.7 times greater than that of lead, particularly under high-energy radiation conditions. It also boasts excellent conductivity, making it widely used in the lighting and welding industries. Compared to the toxicity of lead, the WC-Ni-Fe alloy offers environmentally friendly characteristics.

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