Physical and Chemical Index of Hign Power Graphite Electrode:
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Item
|
Unit
|
HP
|
||
300~500
|
550~700
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Electric Resistivity
|
Electrode
|
uΩ.m
|
5.5~6.8
|
5.5~7.0
|
Nipple
|
4.0~5.5
|
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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
|
1.62~1.70
|
|
Nipple
|
1.72~1.80
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Ash Content
|
Electrode
|
%
|
≤0.3
|
|
Nipple
|
||||
The Coefficient of Thermal Expansion(CTE)
|
Electrode
|
10-6/℃
|
1.80~2.20
|
|
Nipple
|
1.50~1.80
|
High Power Graphite Electrode Current Carrying Capacity
|
|||
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
|
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
|