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
|
|||||
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
|