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| specifications︰ | Technical Properties of Graphite Electrodes
Items
Unit
NoMin..al Diameter(mm)
Regular Power
Impregnated Electrodes
75-130
150-200
250-350
400-500
150-500
Resistivity
Max.. Electrode
Nipple
8.5
9.0
9.0
9.0
8
8.5
8.5
8.5
8.5
7
Elastic Strength
Min. Electrode
Nipple
Mpa
9.8
9.8
7.8
6.4
9.8
12.7
12.7
12.7
12.7
14.0
Elastic Modulus
Max. Electrode
Nipple
Gpa
9.3
9.3
9.3
9.3
12.0
13.7
13.7
13.7
13.7
14.0
Bulk Density
Min. Electrode
Nipple
G/cm3
1.58
1.52
1.52
1.52
1.60
1.63
1.63
1.68
1.68
1.70
Ash
Max. %
0.5
0.5
0.5
0.5
0.3
C.T.E 100-600° C
Max. Electrode
Nipple
m k-1
2.9
2.9
2.9
2.9
2.2
3.0
3.0
3.2
3.2
2.4
Technical Properties of Graphite Electrodes
Items
Unit
NoMin.al Diameter(mm)
High Power
Ultra High Power
300-500
400-600
Resistivity
Max. Electrode
Nipple
7
6.5
6.5
5.5
Bending Strength
Min. Electrode
Nipple
Mpa
9.8
10.0
14.0
15.0
Elastic Modulus
Max. Electrode
Nipple
Gpa
12.0
14.0
14.0
15.0
Bulk Density
Min. Electrode
Nipple
G/cm3
1.62
1.65
1.70
1.70
Ash
Max. %
0.3
0.3
C.T.E 100-600° C
Max. Electrode
Nipple
m k-1
2.2
1.40
2.4
1.60
Specifications & Allowance of Graphite Electrodes
Diameter
Length
Diameter
Actual Diameter
Length
Allowance mm
inch
mm
Max.
Min.
3
75
77
74
1000
+50
-75
4
100
102
99
1200
51/8
130
131
128
6
150
154
151
1600
±100
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 of Graphite Electrodes
NoMin.al 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
25000-40000
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
Df imensions oTapered Nipples
Diameter
Nipple mm
Socket mm
Pitch
mm
inch
mm
D
L
d2
l
d1
H
3TPI
10
12
14
16
18
20
22
24
250
300
350
400
450
500
550
600
155.58
177.17
215.90
241.30
273.05
298.45
298.45
336.55
0
-0.50
220.10
270.90
304.80
338.60
355.60
372.50
372.50
457.20
0
-1
103.80
116.90
150.00
169.80
198.70
221.30
221.72
245.70
0
-3
10
147.14
168.73
207.47
232.87
264.62
290.02
290.02
328.11
+0.50
113.05
138.45
155.40
172.30
180.80
189.25
189.25
231.60
+7
0
8.47
Diameter
Nipple mm
Socket mm
Pitch
mm
inch
mm
D
L
d2
l
d1
H
4TPI
3
4
51/8
6
8
10
12
14
16
18
20
22
24
75
100
130
150
200
250
300
350
400
450
500
550
600
46.04
69.85
79.38
92.08
122.24
152.40
177.80
203.20
222.25
241.30
269.88
298.45
317.50
0
-0.50
76.20
101.60
127.00
139.70
177.80
190.50
215.90
254.00
304.80
304.80
355.60
355.60
355.60
0
-1
20.80
40.30
45.60
56.20
80.00
108.00
129.20
148.20
158.80
177.90
198.00
223.36
242.41
0
-3
6
39.72
63.53
73.06
85.76
115.92
146.08
171.48
196.88
215.93
234.98
263.56
292.13
311.18
+0.50
0
41.10
53.80
66.50
72.85
91.90
101.30
114.00
133.00
158.40
158.40
183.80
183.80
183.80
+7
0
6.35
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