300-500mm HP graphite electrode
,,,
Electric resistivity : 5.5-6.8
Bending strength: >=10.0
Elastic Modulus: <=13
Bulk density:1.62-1.70
Ash: <=0.3
CTE: 1.80-2.20
High power graphite electrode is a graphite electrode with allowable current density between 18-25A/cm2. HP graphite electrode mainly used in high power steelmaking electric arc furnace.
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Physical and Chemical Index of Hign Power Graphite Electrode: |
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|
Item |
Unit |
HP |
||
|
300～500 |
550～700 |
|||
|
Electric Resistivity |
Electrode |
uΩ.m |
||
|
Nipple |
||||
|
Bending Strength |
Electrode |
MPa |
≥10.0 |
≥8.5 |
|
Nipple |
≥18.0 |
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|
Modulus of Elasticity |
Electrode |
GPa |
≤13.0 |
|
|
Nipple |
≤15.0 |
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|
Bulk Density |
Electrode |
g/cm3 |
||
|
Nipple |
||||
|
Ash Content |
Electrode |
% |
≤0.3 |
|
|
Nipple |
||||
|
The Coefficient of Thermal Expansion(CTE) |
Electrode |
10-6/℃ |
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|
Nipple |
||||
|
High Power Graphite Electrode Current Carrying Capacity |
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|
Norminal Diameter |
HP |
||
|
Current Carrying Capacity |
Current Density |
||
|
inch |
mm |
A |
A/cm2 |
|
12 |
300 |
13000～17400 |
17～24 |
|
14 |
350 |
17400～24000 |
17～24 |
|
16 |
400 |
21000～31000 |
16～24 |
|
18 |
450 |
25000～40000 |
15～24 |
|
20 |
500 |
30000～48000 |
15～24 |
|
22 |
550 |
34000～53000 |
14～22 |
|
24 |
600 |
38000～58000 |
13～21 |
|
28 |
700 |
45000～72000 |
12～19 |
|
32 |
800 |
／ |
／ |
|
Tolerance of Graphite Electrode Diameter and Length（mm) |
|||||
|
Nominal Diameter |
Actural diameter |
Length |
|||
|
in |
mm |
max |
min |
Black surface min |
|
|
12 |
300 |
307 |
302 |
299 |
1800/2000 |
|
14 |
350 |
358 |
352 |
349 |
1800/2000/2200 |
|
16 |
400 |
409 |
403 |
400 |
1800/2000/2200 |
|
18 |
450 |
460 |
454 |
451 |
1800/2000/2200 |
|
20 |
500 |
511 |
505 |
502 |
2000/2200/2400 |
|
22 |
550 |
562 |
556 |
553 |
2000/2200/2400/2700 |
|
24 |
600 |
613 |
607 |
604 |
2200/2400/2700/3000 |
|
28 |
700 |
714 |
710 |
707 |
2200/2400/2700/3000 |
|
29 |
800 |
816 |
812 |
809 |
2200/2400/2700/3000 |
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Permissible Deviation of Graphite Electrode Length (mm) |
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|
Nominal Length |
Standard Deviation |
Short Length Deviation |
||
|
max |
min |
max |
min |
|
|
1800 |
+100 |
-100 |
-100 |
-275 |
|
2000 |
+100 |
-100 |
-100 |
-275 |
|
2200 |
+100 |
-100 |
-100 |
-275 |
|
2400 |
+100 |
-100 |
-100 |
-275 |
|
2700 |
+200 |
-150 |
-150 |
-275 |
|
3000 |
+200 |
-150 |
-150 |
-300 |
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