放電加工應用
替代銅製品易加工量輕，可分粗細放電至成品、汽車把手模具、輪框圈模具、保險桿模具、鑄造鋼模具、粉末治具模具
EDM放電加工用石墨
| Proerty | values | R-8500 | R-8510 | R-8650 | R-8710 | E+20 |
| Density | g/cm3 | 1.77 | 1.83 | 1.84 | 1.88 | 1.81 |
| Porosity(Open) | % | 14 | 10 | 10 | 10 | 10 |
| Grain Size |
μm |
10 | 10 | 7 | 3 | 11 |
| Hradness Rockwell B 5/100 |
HRB |
70 | 95 | 95 | 105 | 70 |
| Flexural Strength |
Mpa |
50 | 60 | 65 | 85 | 52 |
| Compressive Strength |
Mpa |
110 | 130 | 150 | 170 | 103 |
|
Specific electrical resistance |
µΩm | 14 | 13 | 14 | 13 | 12.4 |
| Thermal expension | x10-6K-1 | 4.2 | 4.2 | 4.1 | 4.7 | 5 |
|
Thermal conductivity |
Wm-1K-1 | 90 | 105 | 95 | 105 | 104 |
|
Ash Value |
ppm | 200 | 200 | 200 | 200 | 400 |
| Proerty | values | E+25 | E+30 | G-330 | HK-2 | HK-3 |
| Density | g/cm3 | 1.83 | 1.84 | 1.79 | 1.82 | 1.84 |
| Porosity(Open) | % | 8 | - | 15 | - | - |
| Grain Size |
μm |
9 | 8 | 12 | 7 | 3 |
| Hradness Rockwell B 5/100 |
HRB |
80 | 90 | 56 | 64 | 78 |
| Flexural Strength |
Mpa |
55 | 65 | 39.2 | 64 | 88 |
| Compressive Strength |
Mpa |
119 | 134 | - | - | - |
|
Specific electrical resistance |
µΩm | 12.2 | 12.20 | 13 | 13.5 | 15.5 |
| Thermal expension | x10-6K-1 | 5.6 | 6 | 4.8 | - | - |
|
Thermal conductivity |
Wm-1K-1 | 106 | 105 | 104 | - | - |
|
Ash Value |
ppm | 400 | 400 | 400 | 400 | 400 |
