Electric resistivity : 4.5-6.0
Bending strength: >=10.0
Elastic Modulus: <=14
Bulk density: 1.68-1.74
Ash:<=0.3
CTE: 1.10-1.50
Ultra high power graphite electrode is a graphite electrode with allowable current density greater than 25A/cm2 . UHP graphite electrode mainly used in ultra-high power steelmaking electric arc furnace.
Physical and Chemical Index of Ultra high Power Graphite Electrode |
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Item |
Unit |
UHP |
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300~500 |
550~600 |
700~800 |
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Electric Resistivity |
Electrode |
uΩ.m |
4.6~6.2 |
4.5~6.0 |
4.5~5.8 |
Nipple |
3.5~5.0 |
3.4~4.5 |
3.3~4.3 |
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Bending Strength |
Electrode |
MPa |
≥10.5 |
≥10.0 |
≥10.0 |
Nipple |
≥20.0 |
≥22.0 |
≥23.0 |
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Modulus of Elasticity |
Electrode |
GPa |
≤14.0 |
≤14.0 |
≤14.0 |
Nipple |
≤20.0 |
≤22.0 |
≤22.0 |
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Bulk Density |
Electrode |
G/cm3 |
1.66~1.73 |
1.68~1.74 |
|
Nipple |
1.75~1.82 |
1.78~1.85 |
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Ash Content |
Electrode |
% |
≤0.3 |
||
Nipple |
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The Coefficient of Thermal Expansion(CTE) |
Electrode |
10-6/℃ |
1.20~1.50 |
1.10~1.50 |
|
Nipple |
1.10~1.40 |
1.00~1.30 |
UHP Graphite Electrode Current Carrying Capacity |
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Norminal Diameter |
UHP |
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Current Carrying Capacity |
Current Density |
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inch |
mm |
A |
A/cm2 |
12 |
300 |
15000~22000 |
20~30 |
14 |
350 |
20000~30000 |
20~30 |
16 |
400 |
25000~40000 |
19~30 |
18 |
450 |
32000~45000 |
19~27 |
20 |
500 |
38000~55000 |
18~27 |
22 |
550 |
45000~65000 |
18~27 |
24 |
600 |
50000~75000 |
18~26 |
28 |
700 |
70000~120000 |
18~25 |
32 |
800 |
/ |
/ |
Tolerance of Graphite Electrode Diameter and Length |
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Tolerance of Graphite Electrode Diameter and Length(mm) |
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Nominal Diameter |
Actural diameter |
Length |
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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 |