Physical & Chemical Properties of RP Graphite Electrodes
|
Items |
Classification |
Unit |
Nominal Diameter (mm) |
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|
75-130 |
150-225 |
250-300 |
350-450 |
500-800 |
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|
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
Grade B |
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|
Specific Resistance |
Electrode |
μΩm |
8.5 |
10.0 |
9.0 |
10.5 |
9.0 |
10.5 |
9.0 |
10.5 |
9.0 |
10.5 |
|
Nipple |
8.0 |
8.0 |
8.0 |
8.0 |
8.0 |
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|
Bending Strength |
Electrode |
Mpa |
10.0 |
10.0 |
8.0 |
7.0 |
6.5 |
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|
Nipple |
15.0 |
15.0 |
15.0 |
15.0 |
15.0 |
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|
Young’s Modulus |
Electrode |
Gpa |
9.3 |
9.3 |
9.3 |
9.3 |
9.3 |
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|
Nipple |
14.0 |
14.0 |
14.0 |
14.0 |
14.0 |
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|
Bulk Density |
Electrode |
g/cm3 |
1.58 |
1.53 |
1.53 |
1.53 |
1.52 |
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|
Nipple |
1.70 |
1.70 |
1.70 |
1.70 |
1.70 |
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|
CTE (100℃-600℃) |
Electrode |
×10-6/℃ |
2.9 |
2.9 |
2.9 |
2.9 |
2.9 |
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|
Nipple |
2.7 |
2.7 |
2.8 |
2.8 |
2.8 |
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|
Ash Content |
|
% |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
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Note: Ash Content is only for reference.
Recommended current load of RP Graphite Electrodes
|
Grade |
Nominal Dia. |
Allowable current A |
Current density A/cm2 |
|
RP electrode |
200mm |
500～6900 |
15～21 |
|
250mm |
7000～10000 |
14～20 |
|
|
300mm |
14～18 |
||
|
350mm |
13500～18000 |
14～18 |
|
|
400mm |
18000～23500 |
14～18 |
|
|
450mm |
22000～27000 |
13～17 |
|
|
500mm |
25000～32000 |
13～16 |
|
|
550mm |
28000～34000 |
12～14 |
|
|
600mm |
30000～36000 |
11～13 |
|
|
650mm |
32000～39000 |
10～12 |
|
|
700mm |
34000～42000 |
9～11 |