ELLOR® isostatic graphite from Mersen has numerous advantages, making it the preferred material being used for die-sink electrodes.
- It is easy to machine.
- It is very resistant to thermal shock.
- It has a low coefficient of thermal expansion (3 times lower than copper) which guarantees stability of electrode geometry during EDM.
- It does not melt, but goes directly from the solid state to the gaseous at 3400°C, which reduces wear.
- Its density is 5 times lower than that of copper, which results in lighter electrodes.
- It provides a higher metal removal rate than copper with less wear.
- It has the unique characteristic that the wear ratio tends to decrease as the peak current increases.