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Graphite electrode
GRAPHITE ELECTRODE
1. Technical properties：
| Item |
Unit |
Impregnated Electrode |
High Power Electrode |
Ultra-high Power Electrode |
|
|
Diameter |
Diameter |
Diameter |
|||
|
Resistivity |
Electrode |
μΩm |
7.5 |
6.5 |
6.5 |
|
Nipple |
7.0 |
6.0 |
5.5 |
||
|
Bending strength |
Electrode |
Mpa |
10.0 |
10.0 |
10.5 |
|
Nipple |
13.0 |
14.0 |
16.0 |
||
|
Elastic modulous |
Electrode |
Gpa |
12.0 |
12.0 |
14.0 |
|
Nipple |
14.0 |
16.0 |
18.0 |
||
|
Ash content |
Electrode |
% |
0.3 |
0.3 |
0.3 |
|
Nipple |
|||||
|
Bulk density |
Electrode |
G/cm3 |
1.62 |
1.63 |
1.65 |
|
Nipple |
1.70 |
1.72 |
1.72 |
||
|
CTE |
Electrode |
10-6/℃ |
2.7 |
2.2 |
1.5 |
|
Nipple |
2.5 |
2.0 |
1.4 |
||
Remarks: Ash content and CTE are only for reference.
2. Specifications & Allowance of Graphite Electrode:
| Diameter (mm) |
Length (mm) |
||||
|
Nominal Diameter |
Actual Diameter |
Nominal Length |
Allowance |
||
|
mm |
inch |
Max |
Min |
||
|
75 |
3 |
78 |
73 |
1000 |
+50 |
|
100 |
4 |
103 |
98 |
||
|
150 |
6 |
154 |
149 |
1600 |
±100 |
|
200 |
8 |
205 |
200 |
1600 |
|
|
225 |
9 |
230 |
225 |
1800 |
±100 |
|
250 |
10 |
256 |
251 |
1800 |
±100 |
|
300 |
12 |
307 |
302 |
1800 |
|
|
350 |
14 |
357 |
352 |
1800 |
|
|
400 |
16 |
409 |
403 |
1800 |
±100 |
|
450 |
18 |
460 |
454 |
1800 |
|
|
500 |
20 |
511 |
505 |
2000 |
|
3. Suggested Current-Carrying Capacities of Electrode:
| Nominal diameter |
Suggested current carrying capacities (A) |
|||
|
mm |
inch |
IP |
HP |
UHP |
|
75 |
3 |
1300-2000 |
|
|
|
100 |
4 |
1800-3000 |
|
|
|
150 |
6 |
4000-5000 |
|
|
|
200 |
8 |
4800-9000 |
|
|
|
250 |
10 |
8000-12000 |
|
|
|
300 |
12 |
11000-16000 |
13000-17400 |
|
|
350 |
14 |
15000-22000 |
17400-24000 |
22000-28000 |
|
400 |
16 |
20000-28000 |
24000-32000 |
28000-35000 |
|
450 |
18 |
24000-34000 |
32000-40000 |
35000-45000 |
|
500 |
20 |
28000-42000 |
40000-48000 |
45000-55000 |
4. Dimensions of tapered 3TPI nipples:
| Diameter |
Nipple Diameter |
Nipple length |
|
|
mm |
inch |
||
|
225 |
9 |
139.70 |
203.20 |
|
250 |
10 |
155.57 |
220.00 |
|
300 |
12 |
177.16 |
270.90 |
|
350 |
14 |
215.90 |
304.80 |
|
400 |
16 |
241.30 |
338.70 |
|
450 |
18 |
273.05 |
355.60 |
|
500 |
20 |
298.45 |
372.60 |
5. Dimensions of tapered 4TPI nipples:
| Diameter |
Nipple Diameter |
Nipple Length |
|
|
mm |
inch |
||
|
75 |
3 |
46.04 |
76.20 |
|
100 |
4 |
69.85 |
101.60 |
|
150 |
6 |
92.08 |
139.70 |
|
200 |
8 |
122.24 |
177.80 |
|
225 |
9 |
139.70 |
177.80 |
|
250 |
10 |
152.40 |
190.50 |
|
300 |
12 |
177.80 |
215.90 |
|
350 |
14 |
203.20 |
254.00 |
|
400 |
16 |
222.25 |
304.80 |
|
450 |
18 |
241.30 |
304.80 |
|
500 |
20 |
269.88 |
355.60 |