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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.
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 | ||||||
Note: Ash Content is only for reference.
Recommended current load of UHP Graphite Electrodes
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