In case micron control of dimension tolerance and surface roughness when producing precise molds, tungsten alloys are used since they reduce the shaking and vibrations of electrodes and produce precision processing effects. Diverse shapes of electrodes can be produced in accordance with the shapes to be processed of the subjects of processing.
| Material | Ag/Cu content(%) | Density (g/cm3) | Hardness (Hv） | conductivity (IACS%） |
|---|---|---|---|---|
| WC-Ag | 40 ~ 50 | 12.5 ~ 13.0 | > 85 | > 35 |
| 50 ~ 60 | 12.0 ~ 12.5 | > 70 | > 40 | |
| W - Ag | 28 ~ 32 | 15.1 ~ 15.6 | > 85 | > 50 |
| 36 ~ 41 | 14.3 ~ 14.8 | > 71 | > 42 | |
| 47 ~ 53 | 13.3 ~ 13.8 | > 64 | > 60 | |
| W - Cu | 18 ~ 23 | 15.2 ~ 16.0 | 95 ~115 | 30 ~ 45 |
| 23 ~ 27 | 14.7 ~ 15.3 | 90 ~ 110 | 35 ~ 50 | |
| 28 ~ 33 | 14.0 ~ 14.6 | 85 ~ 100 | 40 ~ 55 | |
| 33 ~ 37 | 13.5 ~ 14.0 | 80 ~ 95 | 45 ~ 60 | |
| 37 ~ 42 | 13.0 ~ 13.5 | 70 ~ 85 | 50 ~ 65 | |
| 47 ~ 52 | 12.0 ~ 12.6 | 60 ~ 80 | 55 ~ 75 |
