Tungsten Heavy Metal (WHM)
WNiFe / WNiCu
High-density tungsten alloys with nickel-iron or nickel-copper matrix. Exceptional radiation shielding, superior machinability, and ideal for precision counterweight applications.
Material Properties
Tungsten heavy metal (WHM) alloys consist of tungsten particles (90-97%) bonded together by a nickel-iron or nickel-copper matrix. This combination provides near-tungsten density with significantly improved ductility and machinability compared to pure tungsten.
Applications
- Radiation shielding (X-ray, gamma ray)
- Medical collimators and shielding
- Aircraft and helicopter counterweights
- Automotive crankshaft balancing weights
- Gyroscope components
- Vibration damping weights
- Kinetic energy penetrators
- Boring bars and tool holders
- Fishing and golf club weights
- Industrial counterbalances
Alloy Types
WNiFe (Tungsten-Nickel-Iron)
The most common tungsten heavy metal type. Offers excellent mechanical properties, good machinability, and is suitable for most applications. Magnetic due to iron content.
- Higher strength and hardness
- Magnetic properties
- Lower cost option
WNiCu (Tungsten-Nickel-Copper)
Non-magnetic variant for applications requiring no magnetic interference. Slightly lower mechanical properties but essential for sensitive electronic and medical equipment.
- Non-magnetic
- Better corrosion resistance
- Higher ductility
Available Density Grades
| Grade | W Content (%) | Density (g/cm³) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|---|
| W90 | 90 | 17.0 | 800-900 | 10-15 |
| W93 | 93 | 17.6 | 850-950 | 8-12 |
| W95 | 95 | 18.0 | 900-1000 | 5-10 |
| W97 | 97 | 18.5 | 950-1050 | 3-7 |
Available Forms
Key Advantages
Superior Machinability
Unlike pure tungsten, WHM can be easily machined using conventional methods with carbide tools.
High Ductility
Significantly more ductile than pure tungsten, allowing for complex shapes and reduced brittleness.
Near-Tungsten Density
Achieves up to 96% of pure tungsten density while maintaining excellent workability.
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