Carbon electrodes
Carbon electrodes
Carbon electrodes
| GRADES | GRAPHITE | ANTHRACITE |
|---|---|---|
| Carbon electrode, Grade A (MCM-A) | 50% | 50% |
| Carbon electrode, Grade C (MCM-C) | 55% | 45% |
| Carbo-graphitic electrode (MCGM) | 80% | 20% |
| Graphitized electrode (MGM) | Graphitized (petroleum coke + pitch) | |
Typical dimensions of carbon electrodes
| NOMINAL DIAMETER | NOMINAL LENGTH | APPROXIMATE WEIGHT PER PIECE | ||
|---|---|---|---|---|
| mm | INCHES | mm | INCHES | kg |
| 610 | 24 | 2350 | 93 | 1050 |
| 890 | 35 | 2700 | 106 | 2450 |
| 900 | 35,5 | 2700 | 106 | 2500 |
| 904 | 35,5 | 2700 | 106 | 2550 |
| 960 | 38 | 2700 | 106 | 2850 |
| 1016 | 40 | 2500 | 98 | 2900 |
| 2700 | 106 | 3150 | ||
| 1018 | 40 | 2700 | 106 | 3200 |
| 1060 | 42 | 2700 | 106 | 3400 |
| 2900 | 114 | 3600 | ||
| 1146 | 45 | 2900 | 114 | 4350 |
| 1205 | 47 | 3000 | 118 | 4900 |
| 1272 | 50 | 2700 | 106 | 4900 |
| 2900 | 114 | 5300 | ||
| 1320 | 52 | 2900 | 114 | 5600 |
| 1397 | 55 | 2900 | 114 | 6000 |
Typical properties of carbon electrodes
| CARBON ELECTRODES | UNIT | GRADE | |||
|---|---|---|---|---|---|
| MCM-A | MCM-C | MCGM | MGM | ||
| Specific electrical resistivity, max | μΩm | 35 | 30 | 25 | 15 |
| Breaking strength, min | MPa | 3,0 | 3,0 | 4,0 | 3,5 |
| Bending Strength, min | MPa | 6,0 | 6,0 | 8,5 | 7,0 |
| Total porosity, max | % | 20 | 20 | 24 | 28 |
| Thermal conductivity, min | W/(m·K) | 10 | 11 | 20 | 80 |
| Coefficient of thermal expansion, (t 20–520°С), max | * 10-6 К-1 at 20°C | 3,6 | 3,5 | 3,5 | 3,4 |
| Apparent density, min | g/сm3 | 1,58 | 1,56 | 1,58 | 1,59 |
| Ash content, max | % | 2,5 | 2,5 | 1,6 | 1,5 |
Recommended joining torque
| ELECTRODE DIAMETER, ММ | TORQUE, KN × M | |
|---|---|---|
| CARBON | GRAPHITIZED | |
| 610 | 11,5 – 14,6 | 10,5 – 11,6 |
| 890 | 22,3 – 29,1 | 22,3 – 26,2 |
| 900 | 22,3 – 29,1 | 22,3 – 26,2 |
| 904 | 23,3 – 29,1 | 22,3 – 26,2 |
| 960 | 30,1 – 32,0 | 29,1 – 31,1 |
| 1016 | 33,0 – 36,9 | 31,1 – 35,0 |
| 1018 | 33,0 – 36,9 | 31,1 – 35,0 |
| 1060 | 35,0 – 40,8 | 33,0 – 38,8 |
| 1146 | 43,7 – 46,6 | 41,7 – 45,6 |
| 1205 | 50,5 – 55,3 | 49,5 – 54,4 |
| 1272 | 56,3 – 61,2 | 54,4 – 59,2 |
| 1320 | 56,3 – 63,1 | 54,4 – 61,2 |
