UHP Graphite Electrode
The production process for UHP grade:
Needle coke and pitch are mixed and then molded. Heat treatment is then applied in the baking and graphitization process to form the finished product.
Product parameters
Physical & Chemical Properties of UHP Graphite Electrodes
Items | Classification | Unit | Nominal Diameter (mm) | |||
250-400 | 450-500 | 550-650 | 700-800 | |||
Resistivity | Electrode | μΩm ≤ | 6.2 | 6.3 | 6.0 | 5.8 |
Nipple | 5.3 | 5.3 | 4.5 | 4.3 | ||
Bending Strength | Electrode | Mpa ≥ | 10.5 | 10.5 | 10.0 | 10.0 |
Nipple | 20.0 | 20.0 | 22.0 | 23.0 | ||
Young’s Modulus | Electrode | Gpa ≤ | 14.0 | 14.0 | 14.0 | 14.0 |
Nipple | 20.0 | 20.0 | 22.0 | 22.0 | ||
Bulk Density | Electrode | g/cm3 ≥ | 1.67 | 1.66 | 1.66 | 1.68 |
Nipple | 1.74 | 1.75 | 1.78 | 1.78 | ||
CTE（100℃-600℃） | Electrode | ×10-6/℃ ≤ | 1.5 | 1.5 | 1.5 | 1.5 |
Nipple | 1.4 | 1.4 | 1.3 | 1.3 | ||
Ash Content | Electrode | % ≤ | 0.5 | 0.5 | 0.5 | 0.5 |
Nipple | ||||||
Recommended current load of UHP Graphite Electrodes
Grade | Nominal Dia. | Allowable currentA | Current densityA/cm2 | ||
UHP electrode |
| AC | DC | AC | DC |
300mm | 15000～22000 |
| 20～30 |
| |
350mm | 20000～30000 | - | 20～30 | - | |
400mm | 25000～40000 | - | 19～30 | - | |
450mm | 32000～45000 | - | 19～27 | - | |
500mm | 38000～55000 | - | 18～27 | - | |
550mm | 45000～65000 | 49000～78000 | 18～27 | 20～32 | |
600mm | 50000～75000 | 58000～93000 | 18～26 | 20～32 | |
650mm | 60000～85000 | 60000～110000 | 18～25 | 20～30 | |
700mm | 70000～120000 | 79000～130000 | 18～30 | 20～30 | |
Recommended
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