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Graphite Electrodes
Graphite Electrodes
     
Specification Sheet for Current Carrying Capacities (Amps., Max.)
 

Dia.
(mm)
RP
HD
HP
SHP
UHP
 
 
LF
EAF
LF
EAF
LF
EAF
75
1000-1600
1000-2000
1200-2500
N.A.
N.A.
N.A.
N.A.
N.A.
100
1500-2500
1500-3000
1600-3500
N.A.
N.A.
N.A.
N.A.
N.A.
130
2200-3800
2200-4200
2500-4800
N.A.
N.A.
N.A.
N.A.
N.A.
150
3000-5000
3500-5500
4200-6500
N.A.
N.A.
N.A.
N.A.
N.A.
175
4000-6500
4500-7500
5000-9000
N.A.
N.A.
N.A.
N.A.
N.A.
200
5000-9000
5500-10000
6400-11200
6000-9000
7000-12000
6400-10500
8000-14000
7000-12500
225
6500-11000
7000-12000
10000-14000
8000-11500
11000-16000
9000-13000
12000-18000
10000-15000
250
8000-13500
8500-14500
12500-17000
10500-13500
13000-19000
11000-15000
14000-21000
12000-17000
300
11000-17500
11500-19000
17000-23000
14000-19000
18000-26000
15000-21500
20000-29000
17000-25000
350
15000-23000
16000-25000
22000-31000
17500-24500
24000-33500
20000-28000
27000-37000
24500-32000
400
20000-28000
21000-30000
26000-39000
21000-32000
29000-42000
23000-37000
33000-48000
28000-44000
450
24000-35000
N.A.
32500-49000
26000-40000
35000-52000
29000-45000
39000-58000
34000-52000
500
28000-36000
N.A.
40000-60000
32000-50000
42000-63000
38000-55000
44000-68000
41000-63000
550UHP
AC Furnace: 48000-70000;              DC Furnace: 65000-78000
600UHP
AC Furnace: 55000-80000;              DC Furnace: 75000-90000
650UHP
 AC Furnace: 69000-89000;              DC Furnace: 87000-104000
700UHP
  AC Furnace: 80000-100000;             DC Furnace: 100000-120000

 
Guide to Anlysis of Electrodes Problems
 
Factors
Body
Breakage
Nipple Breakage
Loosening
Tip Spalling
Butt Loss
Oxidation
High
consumption
Nonconductor
 
 
 
 
 
Large scrap
 
 
 
 
 
High transformer capacity
 
Phase Imbalance
 
 
Phase Rotation
 
 
 
 
 
Excessive Vibration
 
 
 
 
High or low clamping pressure
 
 
 
 
 
Roof electrode ports misaligned
 
 
 
 
 
High secondary voltage
 
 
 
High secondary current
 
Low power factor
 
 
High oil consumption
 
 
 
High oxygen consumption
 
 
 
Long time from tap to tap
 
 
 
 
 
Electrode Dipping
 
 
 
 
 
Dirty joint make-up
 
 
 
 
 
Insufficient joint tightening
 
 
 
 
Remark: ● indicates the left factors to be cause the electrode problems.
-          Water sprayed on electrodes above roof will be avail to decrease consumption.
-          Scrap preheating will be avail to decrease consumption.
To Other Destinations
Size(mm)
Packaging
Pcs/20’FCL
Approx.
N.W. (kgs)
200x1500
9pcs/pallet, 24pallets/20’FCL
216
19,000
200x1800
9pcs/pallet, 24pallets/20’FCL
216
21,500
225x1500
16 x 9pcs/pallet, 8 x 6pcs/pallet, 24pallets/20’FCL
192
21,000
225x1800
14 x 9pcs/pallet, 7 x 6pcs/pallet, 21pallets/20’FCL
168
21,000
250x1500
7pcs/pallet, 20pallets/20’FCL
140
18,500
250x1800
7pcs/pallet, 20pallets/20’FCL
140
21,500
300x1500
4pcs/pallet, 27pallets/20’FCL
108
20,500
300x1800
4pcs/pallet, 22pallets/20’FCL
88
20,500
350x1500
3pcs/pallet, 24pallets/20’FCL
72
18,500
350x1800
3pcs/pallet, 22pallets/20’FCL
66
20,500
350x2100
3pcs/pallet, 19pallets/20’FCL
57
20,500
400x1500
12 x 3pcs/pallet, 8 x 2pcs/pallet, 20pallets/20’FCL
52
18,200
400x1800
12 x 3pcs/pallet, 8 x 2pcs/pallet, 20pallets/20’FCL
52
21,000
400x2100
4 x 3pcs/pallet, 16 x 2pcs/pallet, 20pallets/20’FCL
44
21,000
400x2400
8 x 3pcs/pallet, 6 x 2pcs/pallet, 14pallets/20’FCL
36
19,500
450x1800
2pcs/pallet, 20pallets/20’FCL
40
21,000
450x2100
2pcs/pallet, 17pallets/20’FCL
34
21,000
450x2400
6 x 3pcs/pallet, 6 x 2pcs/pallet, 12pallets/20’FCL
30
20,500
500x1800
2pcs/pallet, 16pallets/20’FCL
32
20,700
500x2100
2pcs/pallet, 14pallets/20’FCL
28
20,500
500x2400
2pcs/pallet, 12pallets/20’FCL
24
21,000
To Japan and USA
Size(mm)
Packaging
Pcs/20’FCL
Approx.
N.W. (kgs)
200x1500
9pcs/pallet, 24pallets/20’FCL
216
19,000
200x1800
9pcs/pallet, 21pallets/20’FCL
189
19,200
225x1500
14 x 9pcs/pallet, 8 x 6pcs/pallet, 24pallets/20’FCL
174
19,000
225x1800
13 x 9pcs/pallet, 6 x 6pcs/pallet, 21pallets/20’FCL
153
19,000
250x1500
7pcs/pallet, 20pallets/20’FCL
140
18,200
250x1800
7pcs/pallet, 18pallets/20’FCL
126
19,500
300x1500
4pcs/pallet, 25pallets/20’FCL
100
19,000
300x1800
4pcs/pallet, 20pallets/20’FCL
80
18,400
350x1500
3pcs/pallet, 24pallets/20’FCL
72
18,500
350x1800
3pcs/pallet, 20pallets/20’FCL
60
18,500
350x2100
3pcs/pallet, 17pallets/20’FCL
51
18,300
400x1500
12 x 3pcs/pallet, 8 x 2pcs/pallet, 20pallets/20’FCL
52
18,200
400x1800
3pcs/pallet, 16pallets/20’FCL
48
19,200
400x2100
8 x 3pcs/pallet, 8 x 2pcs/pallet, 16pallets/20’FCL
40
18,800
400x2400
8 x 3pcs/pallet, 6 x 2pcs/pallet, 14pallets/20’FCL
36
19,500
450x1800
2pcs/pallet, 18pallets/20’FCL
36
18,500
450x2100
2pcs/pallet, 15pallets/20’FCL
30
18,600
450x2400
5 x 3pcs/pallet, 6 x 2pcs/pallet, 11pallets/20’FCL
27
19,000
500x1800
2pcs/pallet, 15pallets/20’FCL
30
19,200
500x2100
2pcs/pallet, 13pallets/20’FCL
26
19,000
500x2400
2pcs/pallet, 11pallets/20’FCL
22
19,200
Quality Control and Inspection
Except for quality control system according to ISO9002 in our manufacturers, our inspectors examine each pieces of electrodes before shipment. Our inspection standard is as follows:
1.      Length of electrodes: No more than 8% short length electrodes in each shipment.
2.      Nipples for electrode of dia 250 mm & above are supplied with pitch plug unless specified otherwise.
3.      Electrodes of dia 250 mm & above are prefitted with nipple prior to dispatch unless specified otherwise.
4.       All nipples are supplied with Dust grooves unless specified otherwise.
5.       All electrodes of dia. 250mm & above have secured protective end caps.
6.       All electrodes have proper ID marked on the surface with paint.
7.       On each length end of the crates, paper-size shipping marks to be printed clearly.
8.       All electrodes are packed without plastic film unless specific otherwise.
9.      Any surface defect should be taken a picture by inspector, the picture should be mailed to Manager.
10.  Any sockets and nipples defect should be taken a picture by inspector, the picture should be mailed to Manager.
11.  No less than 20% of electrodes sockets of dia. 350mm and 400mm are examined concentric degree.
12.  All electrodes sockets of dia. 450mm and above are examined concentric degree.
13.  A packing list in electronic format should be sent to customer with all electrode shipments. The packing lists contain the following information for both electrodes and nipples: customer order number, weight per piece, resistivity and bulk density of each piece.
Standared Size of Electrodes and Tapered Nipples
Diameter
(mm)
Standard Nipple size
Diameter Tolerance
Nominal Length
4 T.P.I Nipple
3 T.P.I Nipple
Maximum
(mm)
Minimum
(mm)
Low Spot
(mm)
Supplied
(mm)
Dia (mm)
Length (mm)
Dia (mm)
Length (mm)
75 
46.04 
76.20
 - 
78 
73 
72 
1000,1200 
100 
69.85 
101.60 
-
103 
98 
97 
1000,1200,1500 
130 
79.38 
127.00
-
132 
127 
126 
1000,1200,1500
150 
92.08
139.70 
154 
149 
146 
1200,1500,1800 
175 
107.95 
165.10 
179 
174 
171 
1200,1500,1800 
200 
122.24 
177.80 
205
200 
197 
1200,1500,1800 
225 
139.70 
177.80 
230 
225 
222 
1500,1800 
250 
152.40 
190.50 
155.58 
220.10 
256 
251 
248 
1500,1800 
300 
177.80 
215.90 
177.17 
270.90 
307 
302 
299 
1500,1800,2100 
350 
203.20 
254.00 
215.90 
304.80 
357 
352 
349 
1500,1800,2100 
400 
222.25 
304.80 
215.90
304.80
409 
403 
400 
1500,1800,2100,2400,2700 
400 
222.25 
355.60
241.30
338.70
409 
403 
400 
1500,1800,2100,2400,2700 
450 
241.30 
304.80 
24I.30 
304.80 
460 
454 
451 
1800, 2100, 2400, 2700
450 
241.30 
355.60
273.05
355.60
460 
454 
451 
1800, 2100, 2400, 2700
500 
269.88 
355.60
273.05 
355.60 
511 
505 
502 
1800, 2100, 2400, 2700
500 
269.88 
457.20 
298.45
372.60
511 
505 
502 
1800, 2100, 2400, 2700
550 
298.45 
355.60
298.45 
372.50 
562 
556 
553 
1800, 2100, 2400, 2700
550 
298.45 
457.20 
-
562 
556 
553 
1800, 2100, 2400, 2700
600 
317.5 
355.60
613 
607 
604 
1800, 2100, 2400, 2700
600 
317.5 
457.20 
613 
607 
604 
1800, 2100, 2400, 2700
650 
355.60
457.20 
657
663
655 
2400, 2700
650 
355.60
558.80
657
663
655 
2400, 2700
700 
374.65
457.20 
714
708
705
2400, 2700
700 
374.65
558.80
714
708
705
2400, 2700
 
 (II ) Length Tolerance:
- 119
- 271
Nominal Length (mm)
Full Length (mm)
Short Length (mm)
Maximum
Minimum
Maximum
Minimum
1000 
+ 41 
- 60 
- 60
- 187
1200 
+ 45
- 82
 - 82
- 235
1500 
+ 100
- 78
- 78
- 255
1800 
+ 105
- 98
- 98
- 225 
2100 
,
+ 110
- 119
2400 
+ 115 
- 114
- 114
- 266
2700 
+ 195
- 160
 - 160
- 287
 
Each shipme, nt may contain up to 8% Short Length Electrodes
 
HD
 
Specification
Unit
Nominal Diameter (mm)
Matching Nipp, , , , , les
 
 
50-150
175-300
350-400
450-500
 
Electrical Resistivity
μΩm
6.5-7.5
7.0-8.0
7.5-8.5
7.5-8.5
5.5-6.5
Bending Strength
Mpa
10-14
10-14
9.0-13
8.0-12
14-18
Flexural Strength
GPa
8.0-12
8.0-12
8.0-12
8.0-12
9.0-14
Bulk Density
g/cm3
1.62-1.72
1.62-1.72
1.60-1.70
1.60-1.70
1.72-1.82
Ash
%
0.2-0.4
0.2-0.4
0.2-0.4
0.2-0.4
0.2-0.4
CTE(100-600°С)
10-6/°С
2.0-2.4
2.0-2.4
2.0-2.4
2.0-2.4
1.8-2.2
 
HP
 
Specification
Unit
Nominal Diameter (mm)
Matching Nipples
 
 
50-150
175-300
350-400
450-500
 
Electrical Resistivity
μΩm
5.5-6.5
5.5-6.5
5.8-6.8
6.0-7.0
3.8-5.0
Bending Strength
Mpa
11-15
11-15
10.5-15
10.5-15
15-20
Flexural Strength
GPa
8.0-11
8.0-11
8.0-11
8.0-11
10-14
Bulk Density
g/cm3
1.62-1.72
1.62-1.72
1.60-1.70
1.60-1.70
1.72-1.82
Ash
%
0.1-0.3
0.1-0.3
0.1-0.3
0.1-0.3
0.1-0.3
CTE(100-600°С)
10-6/°С
1.8-2.2
1.8-2.2
1.8-2.2
1.8-2.2
1.4-1.8
RP
Specification
Unit
Nominal Diameter (mm)
Matching Nipples
 
 
50-150
175-300
350-400
450-500
 
Electrical Resistivity
μΩm
7.0-8.0
7.5-8.5
8.0-9.0
8.5-9.5
6.0-7.0
Bending Strength
Mpa
10-14
10-14
9.0-13
8.0-12
14-18
Flexural Strength
GPa
8.0-12
8.0-12
8.0-12
8.0-12
9.0-14
Bulk Density
g/cm3
1.56-1.62
1.56-1.62
1.55-1.60
1.54-1.58
1.70-1.80
Ash
%
0.2-0.4
0.2-0.4
0.2-0.4
0.2-0.4
0.2-0.4
CTE(100-600°С)
10-6/°С
2.0-2.4
2.0-2.4
2.0-2.4
2.0-2.4
1.8-2.2
 
SHP
 
Specification
Unit
Nominal Diameter (mm)
Matching Nipples
 
 
200-300
350-400
450-500
 
Electrical Resistivity
μΩm
4.5-5.8
4.5-6.0
4.5-6.2
3.0-4.5
Bending Strength
Mpa
11-15
10.5-15
10.5-15
16-25
Flexural Strength
GPa
9.0-12
9.0-12
9.0-12
10-16
Bulk Density
g/cm3
1.65-1.75
1.65-1.75
1.65-1.75
1.75-1.85
Ash
%
0.1-0.3
0.1-0.3
0.1-0.3
0.1-0.2
CTE(100-600°С)
10-6/°С
1.4-1.8
1.4-1.8
1.4-1.8
1.0-1.3
UHP
Specification
Unit
Nominal Diameter (mm)
Matching Nipples
 
 
300-400
450-500
550-700
 
Electrical Resistivity
μΩm
4.0-5.5
4.0-5.5
4.2-5.8
2.8-3.8
Bending Strength
Mpa
11-15
10.5-15
10.5-15
18-25
Flexural Strength
GPa
9.0-14
9.0-14
9.0-14
10-18
Bulk Density
g/cm3
1.65-1.75
1.65-1.75
1.65-1.75
1.76-1.86
Ash
%
0.1-0.3
0.1-0.3
0.1-0.3
0.1-0.2
CTE(100-600°С)
10-6/°С
1.2-1.5
1.2-1.5
1.2-1.5
0.9-1.2
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