Materials overview
It has the highest melting point of any practical metal, and a density 1.7 times that of lead. Where a vacuum furnace heating element above 2000°C and radiation shielding are needed at once, no metal replaces tungsten.
It has the highest melting point of any metal. It does not melt below 3,422℃, and at 19.3 g/cm³ its density is about 1.7 times that of lead.
It goes into positions that need the greatest mass and the highest heat resistance in the same volume — radiation shielding, counterweights, electrodes, fusion reactor plasma-facing materials.
Key Property Values
These are the values engineers check first at the design stage. Actual delivery specifications follow the per-lot test report.
| Item | Value | Description |
|---|---|---|
| Melting point | 3422 °C | The highest of any practical metal |
| Density g/cm³ | 19.3 | About 1.7 times that of lead |
| Thermal conductivity W/m·K | 173 | Among the highest of the refractory metals |
| Thermal expansion µm/m·K | 4.5 | Among the lowest of any metal |
| Recommended atmosphere | Vacuum | Oxidizes above 600°C in air — a protective atmosphere is required |
| Supply grades | 6 | Pure W · WCu · WAg · WNiFe · WNiCu |
Figures are representative values. The thermal expansion coefficient is taken from published literature and needs review before release.
Key Advantages
How these figures translate into advantages in actual processes.
Ultra-high melting point · high-temperature strength
With a melting point of 3,422℃ and high strength at temperature, it holds its shape even on faces that meet the arc and the plasma directly.
High-density shielding
At 19.3 g/cm³ it gives the same shielding performance in a thinner section — an advantage for collimators that fit into a small space.
Low thermal expansion · dimensional stability
At 4.5 µm/m·K it is close to ceramics. Joints do not open up through repeated heating and cooling.
Supply Forms · Machining Options
| Form | Specification |
|---|---|
| Wire · Rod stock | Ø 0.01 – 1.50 mm |
| Sheet · Plate | t 0.025 – 20.0 mm |
| Rod · Bar | Ø 0.3 – 90 mm |
| Custom machined parts | To drawing |
Custom Machining Capability
- Cutting to drawing dimensions · CNC / MCT machining
- Wire EDM · laser machining · welded assemblies
- Forming (bending · deep drawing) and surface treatment
- The same tolerances from a single prototype to full production
Related Products · Applications
Sputtering targets
High-purity targets for semiconductor interconnect and display thin-film deposition
Electrodes · Crucibles
High-temperature vessels and electrodes that react little with molten metal
Semiconductor equipment parts
Hot zone jigs and ion implanter parts inside the chamber
Evaporation coils
Heating coils and boats for evaporation
ITER parts
Tokamak divertor parts in direct contact with the plasma
Radiation shielding parts
Shielding and collimators for medical and inspection equipment
