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300-500mm UHP graphite electrodeUHP Graphite ElectrodesOxidation Resistance Graphite ElectrodeUHP Graphite Electrodes Manufacturer
Electric resistivity : 4.6-6.2
Bending strength: >=10.5
Elastic Modulus:
Bulk density:1.66-1.73
Ash:
CTE:1.20-1.50
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.
Ultra High Power Graphite Electrode Current Carrying CapacityUltra High Power Graphite Electrode Current Carrying Capacity
Physical and Chemical Index of Ultra high Power Graphite Electrode | |||||
Item |
Unit |
UHP |
|||
300～500 |
550～600 |
700～800 |
|||
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 |
||
Bending Strength |
Electrode |
MPa |
≥10.5 |
≥10.0 |
≥10.0 |
Nipple |
≥20.0 |
≥22.0 |
≥23.0 |
||
Modulus of Elasticity |
Electrode |
GPa |
≤14.0 |
≤14.0 |
≤14.0 |
Nipple |
≤20.0 |
≤22.0 |
≤22.0 |
||
Bulk Density |
Electrode |
G/cm3 |
1.66～1.73 |
1.68～1.74 |
|
Nipple |
1.75～1.82 |
1.78～1.85 |
|||
Ash Content |
Electrode |
% |
≤0.3 |
||
Nipple | |||||
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 | |||
Norminal Diameter |
UHP |
||
Current Carrying Capacity |
Current Density |
||
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（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 |
Permissible Deviation of Graphite Electrode Length (mm) | ||||
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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