Electric arc furnaces where electrodes are electrically heated and most steel furnaces, they are mixed with petroleum coke and petroleum pitch, extruded, then baked and sintered, and then heated to graphitization temperature above (3000°C) to convert carbon to graphite. They can change in size up to 11 feet long and diameter 30 .
Item | Unit | Nominal diameter | ||||
| 200-300 | 350-400 | 450-500 | 550-600 | |||
Bulk density | Head | G/CM3 | ≥ 1.65 | ≥ 1.65 | ≥ 1.65 | ≥ 1.65 |
Electrode | ≥ 1.75 | ≥ 1.75 | ≥ 1.75 | ≥ 1.75 | ||
Resistivit | Head | μΩM | ≤6.5 | ≤6.5 | ≤6.5 | ≤6.5 |
Electrode | ≤4.0 | ≤4.0 | ≤4.0 | ≤4.0 | ||
The bending strength is 12 | Head | MPA | ≥12.0 | ≥12.0 | ≥12.0 | ≥12.0 |
Electrode | ≥16.0 | ≥16.0 | ≥16.0 | ≥16.0 | ||
Elastic Modulus | Head | GPA | ≤10.0 | ≤10.0 | ≤10.0 | ≤10.0 |
Electrode | ≤14.0 | ≤14.0 | ≤14.0 | ≤14.0 | ||
C.T.E. (100- 600/°C) | Head | 10-6/°C | ≤ 2.2 | ≤ 2.2 | ≤ 2.2 | ≤ 2.2 |
Electrode | ≤ 2.2 | ≤ 2.2 | ≤ 2.2 | ≤ 2.2 | ||
| ASH | % | ≤0.3 | ≤ 0.25 | ≤ 0.25 | ≤ 0.25 | |
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