Tungsten Copper Rods for EDM, Electrical Contacts and Heat Management Systems
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Tungsten copper rods combine tungsten’s extreme heat resistance with copper’s excellent electrical and thermal conductivity.
They are produced via powder metallurgy and infiltration processes to ensure uniform microstructure and stable performance.
These rods are widely used in EDM electrodes, electrical contacts, aerospace systems and high-voltage switching devices.
Description
Tungsten copper rods are precision-engineered composite materials designed for high-performance industrial applications.
They combine tungsten’s high melting point with copper’s superior conductivity and thermal stability.
Manufactured using powder metallurgy and infiltration technology, they offer uniform density and low porosity.
These rods are widely used in EDM machining, electrical contact systems, and aerospace thermal components.
They provide excellent arc resistance, wear resistance, and dimensional stability under extreme conditions.
Available in multiple grades, tungsten copper rods ensure reliable performance in high-voltage and high-temperature environments.
Common Grades & Specifications
Buyers choose the grade based on conductivity vs heat resistance requirements.
| Grade | Copper % | Tungsten % | ASTM B702 | RWMA Class | Application |
| W50/Cu50 | 48–52% | Balance | Class A | — | Light-duty electrical contacts |
| W60/Cu40 | 38–42% | Balance | Class B | — | General EDM electrodes |
| W70/Cu30 | 28–32% | Balance | Class C | Class 10 | High-voltage switchgear |
| W75/Cu25 | 23–27% | Balance | Class D | Class 11 | Heavy-duty EDM & welding |
| W80/Cu20 | 18–22% | Balance | Class E | Class 12 | Heat sinks & aerospace nozzles |
| W90/Cu10 | 8–12% | Balance | — | — | Specialized thermal mounting |
Available Product Forms & Dimensions
Tungsten copper is not cast. It is produced in semi-finished forms for precision machining.
| Product Form | Diameter / Thickness | Length / Size | Finish |
| Round Rod | 1–100 mm | 100–1000 mm | Ground / Polished |
| Square / Hex Bar | 5–80 mm | 200–500 mm | Machined |
| Plate / Sheet | 1–50 mm | 100×200 to 300×300 mm | Rolled / Ground |
| Foil / Strip | 0.05–0.5 mm | Custom | Bright / Matte |
| Finished Parts | Per drawing | Per drawing | CNC / EDM |
Physical Properties
| Grade | Density (g/cm³) | Hardness (HB) | Conductivity (% IACS) |
| W60/Cu40 | ~12.75 | 140 | 47% |
| W70/Cu30 | ~14.18 | 175 | 42% |
| W75/Cu25 | ~14.50 | 195 | 38% |
| W80/Cu20 | ~15.15 | 220 | 34% |
| W90/Cu10 | ~16.75 | 260 | 27% |
Video
FAQs
1. Why are tungsten copper rods used in EDM?
Because they resist erosion and maintain stable conductivity.
2. Are they suitable for high temperature environments?
Yes, they perform well under extreme thermal conditions.
3. Can they be customized?
Yes, diameter and grade can be customized.
Literature
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Robust provides high-quality Tungsten Copper Rods for EDM, Electrical Contacts and Heat Management Systems solutions for industrial, high-temperature, and precision engineering applications worldwide.
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