Tungsten Copper ECM Electrode
Tungsten-copper (WCu) alloys are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. We call them tungsten copper wheels. All material is manufactured by pressing, sintering, and infiltrating. Homogeneous material is achieved using virgin powders, leading to very uniform and high, consistent burning rates. In plunger/sinker applications where high definition is necessary, particularly in tungsten carbide, copper tungsten is used. Tungsten alloys are preferred when matching extremely detailed sections. In the ECM process, Copper-Tungsten withstands the erosive effects of short circuit malfunctions far better than other materials.
Tungsten Copper for ECM Typical Average Properties
1) Density: 14.0 g/cc
2) Rockwell Hardness: 90 B
3) Electrical Conductivity: 48% I.A.C.S.
4) Copper Content: 25-30%
5) Tungsten Content: 70-75%
Tungsten Copper for ECM Material Grade
| Description | % | RWMA Class | Density | Elect Cond % IACS | Hardness |
| Tungsten Copper | 70 30 | EDM ECM | 14.25 | 44-52 | 90-96 RB |
| Tungsten Copper | 75 25 | 11 | 14.80 | 42-50 | 96-99 RB |
| Tungsten Copper | 80 20 | 12 | 15.60 | 41-49 | 99-104 RB |
| Tungsten Silver | 78 22 | EDM ECM | 15.56 | 48-53 | 90-100 RB |
