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 Details
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
Grade
Nominal Dia.
Allowable current A
Current density A/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
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