700-800mm UHP graphite electrode,UHP Graphite Electrodes,Oxidation Resistance Graphite Electrode
,,,er
er
Electric resistivity : 4.5-5.8
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 |
|||||||
|
300～500 |
550～600 |
700～800 |
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|
Electric Resistivity |
Electrode |
uΩ.m |
|||||||
|
Nipple |
|||||||||
|
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 |
|||||||
|
Nipple |
|||||||||
|
Ash Content |
Electrode |
% |
≤0.3 |
||||||
|
Nipple |
|||||||||
|
The Coefficient of Thermal Expansion(CTE) |
Electrode |
10-6/℃ |
|||||||
|
|
Nipple |
|
|||||||
|
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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