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Technical Properties of Graphite Electrodes:

Items
Unit
Nominal Diameter(mm)
Regular Power
High Power
Ultra High Power
75-130
150-200
250-350
400-500
300-500
400-600
Resistivity
Max
Electrode
¦Ì¦¸m
8.5
9.0
9.0
9.0
7
6.5
Nipple
8.5
8.5
8.5
8.5
6.5
6.5
Bending Strength
Min
Electrode
Mpa
9.8
9.8
7.8
6.4
9.8
10.0
Nipple
12.7
12.7
12.7
12.7
14.0
15.0
Elastic Modulus
Max
Electrode
GPa
9.3
9.3
9.3
9.3
12.0
14.0
Nipple
13.7
13.7
13.7
13.7
14.0
15.0
Bulk Density
Max
Electrode
g/cm3
1.58
1.52
1.52
1.52
1.60
1.65
Nipple
1.63
1.63
1.68
1.68
1.70
1.70
Ash Content
Max
-
%
0.5
0.5
0.5
0.5
0.3
0.3
C.T.E 100-600¡æ
Max
Electrode
¦ÌK-1
2.9
2.9
2.9
2.9
2.2
1.4
Nipple
3.0
3.0
3.2
3.2
2.4
1.6
Note:Remark:ash content and C.T.E for reference.

Specifications & Allowance of Graphite Electrodes
Diameter
Length
Diameter
Actual Diameter
Length mm
Allowance mm
inch
mm
MAX
MIN
3
75
77
74
1000
+50
-75
4
100
102
99
1200
5 1/8
130
131
128
6
150
154
151
1600
¡À100
8
200
204
201
10
250
256
252
1600
1800
12
300
307
303
14
350
357
353
16
400
408
404
1800
2000
18
450
459
455
20
500
510
506
22
550
561
557
2000-2500
24
600
612
608

Current Carrying Capacity and Current Density
Nominal Diameter mm
Regular Power
High Power
Ultra High Power
Current Carrying Capacity A
Current Density A/cm2
Current Carrying Capacity A
Current Density A/cm2
Current Carrying Capacity A
Current Density A/cm2
75
1000-1400
22-31
-
-
-
-
100
1500-2400
19-30
-
-
-
-
130
2200-3400
17-26
-
-
-
-
150
3000-4500
16-25
-
-
-
-
200
5000-6900
15-21
-
-
-
-
250
7000-10000
14-20
-
-
-
-
300
10000-13000
14-18
13000-17400
17-24
-
-
350
13500-18000
14-18
17400-24000
17-24
-
-
400
18000-23500
14-18
21000-31000
16-24
25000-4000
19-30
450
22000-27000
13-17
25000-40000
15-24
32000-45000
19-27
500
25000-32000
13-16
30000-48000
15-24
38000-55000
18-27
550 30000-42000 13-18 44000-58000 18-24 48000-66000 20-28
600 40000-53000 14-19 52000-67000 18-24 55000-76000 19-27

Dimensions of Tapered Nipples
Diameter
Nipple mm
Socket mm
Pitch mm
inch
mm
D
L
d2
l
d1
H
3TPI
10
250
155.58
220.10
103.80
147.14
113.05
12
300
177.17
270.90
116.90
168.73
138.45
14
350
215.90
304.80
150.00
207.47
155.40
16
400
241.30
0
338.60
0
169.80
0
10
232.87
+0.50
172.30
+7
8.47
18
450
273.05
-0.50
355.60
-1
198.70
-3
264.62
0
180.80
0
20
500
298.45
372.50
221.30
290.03
189.25
22
550
298.45
372.50
221.72
290.02
189.25
24
600
336.55
457.20
245.70
328.11
231.60

Diameter
Nipple mm
Socket mm
Pitch mm
inch
mm
D
L
d2
l
d1
H
4TPI
3
75
46.04
76.20
20.80
39.72
41.10
6.35
4
100
69.85
101.60
40.30
63.53
53.80
5 1/8
130
79.38
127.00
45.60
73.06
66.50
6
150
92.08
139.70
56.20
85.76
72.85
8
200
122.24
177.80
80.00
115.92
91.90
10
250
152.40
0
190.50
0
108.00
0
6
146.08
+0.5
101.30
+7
12
300
177.80
-0.5
215.90
-1
129.20
-3
171.48
0
114.00
0
14
350
203.20
254.00
148.20
196.88
133.00
16
400
222.25
304.80
158.80
215.93
158.40
18
450
241.30
304.80
177.90
234.98
158.40
20
500
269.88
355.60
198.00
263.56
183.80
22
550
298.45
355.60
223.36
292.13
183.80
24
600
317.50
355.60
242.41
311.18
183.80

Moment for Reference for Connecting Nipples and Electrodes
Diameter of Electrode
Moment
Diameter of Electrode
Moment
in
mm
ft-1bs
kgs-m
in
mm
ft-1bs
kgs-m
3
75
22
3
12
300
720
100
4
100
43
6
14
350
1190
165
5
130
72
10
16
400
1450
200
6
150
110
15
17
425
1660
230
7
175
160
22
18
450
1800
250
8
200
230
32
20
500
2310
320
9
225
330
45
22
550
2750
380
10
250
430
60
24
600
3110
430


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