|
Graphite Electrode Specifications & Tolerance
Unit: mm
|
Nominal Diameter
|
Actual Diameter(Ｄ)
|
Nominal Length
|
|
In
|
mm
|
Max
|
Min
|
Rough spot(Ｂ)
|
|
3''
|
75
|
77
|
74
|
72
|
1000/1200
|
|
4''
|
100
|
102
|
99
|
97
|
1000/1200
|
|
5''
|
130
|
131
|
128
|
126
|
1000/1200
|
|
6''
|
150
|
154
|
151
|
148
|
1600/1800
|
|
8''
|
200
|
205
|
201
|
197
|
1600/1800
|
|
9''
|
225
|
230
|
225
|
222
|
1600/1800
|
|
10''
|
250
|
256
|
251
|
249
|
1600/1800
|
|
12''
|
300
|
307
|
302
|
299
|
1600/1800/1900/2000
|
|
14''
|
350
|
357
|
352
|
349
|
1600/1800/1900/2000/2200
|
|
16''
|
400
|
409
|
403
|
400
|
1600/1800/1900/2000/2200/2400
|
|
18''
|
450
|
460
|
454
|
451
|
1600/1800/1900/2000/2200/2400
|
|
20''
|
500
|
511
|
505
|
502
|
1800/1900/2000/2200/2400
|
|
22''
|
550
|
562
|
556
|
553
|
1800/2000/2200/2400
|
|
24''
|
600
|
613
|
607
|
604
|
2000/2200/2400/2700
|
|
26''
|
650
|
663
|
657
|
654
|
2400/2700/3000
|
|
28''
|
700
|
714
|
708
|
705
|
2400/2700/3000
|
|
|
Electrode length and Tolerance
Unit: mm
|
Nominal Length
|
Tolerance
|
Shorter length tolerance
|
|
max
|
min
|
max
|
min
|
|
1600
|
+100
|
-100
|
-100
|
-275
|
|
1800
|
+100
|
-100
|
-100
|
-275
|
|
1900
|
+100
|
-100
|
-100
|
-275
|
|
2000
|
+100
|
-100
|
-100
|
-275
|
|
2200
|
+100
|
-100
|
-100
|
-275
|
|
2400
|
+100
|
-100
|
-100
|
-275
|
|
2700
|
+150
|
-150
|
-150
|
-300
|
|
3000
|
+150
|
-150
|
-150
|
-300
|
|
|
Size of Tapered nipples
Unit: mm
|
Diameter
|
Nipple
|
Socket
|
Pitch
|
|
D
|
d2
|
L
|
l
|
d1
|
H
|
|
Tolerance:
|
≤
|
Tolerance:
|
|
|
mm
|
in
|
(-0.30～0)
|
(-0.30～0)
|
(-1～0)
|
(0～0.3)
|
(0～7)
|
8.47
|
|
3TPI
|
225
|
9″
|
139.70
|
91.22
|
203.20
|
7
|
141.22
|
107.60
|
|
250
|
10″
|
155.57
|
104.20
|
220.00
|
157.09
|
116.00
|
|
300
|
12″
|
177.16
|
117.39
|
270.90
|
148.68
|
141.50
|
|
350
|
14″
|
215.90
|
150.48
|
304.80
|
217.42
|
158.40
|
|
400
|
16″
|
215.90
|
150.48
|
304.80
|
217.42
|
158.40
|
|
400
|
16″
|
241.30
|
170.23
|
338.70
|
242.82
|
175.30
|
|
450
|
18″
|
241.30
|
170.23
|
338.70
|
242.82
|
175.30
|
|
450
|
18″
|
273.05
|
199.17
|
355.60
|
274.57
|
183.80
|
|
500
|
20″
|
273.05
|
199.17
|
355.60
|
274.57
|
183.80
|
|
500
|
20″
|
298.45
|
221.73
|
372.60
|
299.97
|
192.20
|
|
550
|
22″
|
298.45
|
221.73
|
372.60
|
299.97
|
192.20
|
|
600
|
24″
|
336.55
|
245.73
|
457.30
|
338.07
|
234.60
|
|
3TPIL
|
350
|
14″
|
215.90
|
144.85
|
338.70
|
217.42
|
175.30
|
|
400
|
16″
|
241.30
|
167.43
|
355.60
|
242.82
|
183.80
|
|
450
|
18″
|
273.05
|
182.23
|
457.30
|
274.57
|
234.60
|
|
4TPI
|
200
|
8″
|
122.24
|
81.48
|
177.80
|
7
|
115.92
|
94.90
|
6.35
|
|
225
|
9″
|
139.70
|
98.94
|
177.80
|
133.38
|
94.90
|
|
250
|
10″
|
152.40
|
109.52
|
190.50
|
146.08
|
101.30
|
|
300
|
12″
|
177.80
|
130.69
|
215.90
|
171.48
|
114.00
|
|
350
|
14″
|
203.20
|
149.74
|
254.00
|
196.88
|
133.00
|
|
400
|
16″
|
222.25
|
160.32
|
304.80
|
215.93
|
158.40
|
|
450
|
18″
|
241.30
|
179.37
|
304.80
|
234.98
|
158.40
|
|
500
|
20″
|
269.88
|
199.49
|
355.60
|
263.56
|
183.80
|
|
550
|
22″
|
298.45
|
228.06
|
355.60
|
292.13
|
183.80
|
|
600
|
24″
|
317.50
|
247.11
|
355.60
|
311.18
|
183.80
|
|
650
|
26″
|
355.60
|
268.27
|
457.20
|
349.28
|
234.60
|
|
700
|
28″
|
374.65
|
287.32
|
457.20
|
368.33
|
234.60
|
|
4TPIL
|
300
|
12″
|
177.80
|
124.34
|
254.00
|
171.48
|
133.00
|
|
350
|
14″
|
203.20
|
141.27
|
304.80
|
196.88
|
158.40
|
|
400
|
16″
|
222.25
|
151.86
|
355.60
|
215.93
|
183.80
|
|
450
|
18″
|
241.30
|
170.91
|
355.60
|
234.98
|
183.80
|
|
500
|
20″
|
269.88
|
182.55
|
457.20
|
263.56
|
234.60
|
|
550
|
22″
|
298.45
|
211.12
|
457.20
|
292.13
|
234.60
|
|
600
|
24″
|
317.50
|
230.17
|
457.20
|
311.18
|
234.60
|
|
650
|
26″
|
355.64
|
251.38
|
558.80
|
349.28
|
285.40
|
|
700
|
28″
|
374.65
|
270.39
|
558.80
|
368.33
|
285.40
|
Remarks: Cylindrical nipples are available as per client’s request.
|
|
Technical Specification RP( Regular power)
|
Item
|
Unit
|
Nominal Diameter
(mm)
|
|
RP
|
|
≤Φ300
|
≥Φ350
|
|
Resistance
|
Electrode
|
μΩ·m
|
≤8.5
|
|
Nipple
|
≤6.5
|
|
Bending Strength
|
Electrode
|
MPa
|
≥8.5
|
≥7.0
|
|
Nipple
|
≥15.0
|
|
Elastic Modulus
|
Electrode
|
GPa
|
≤9.3
|
|
Nipple
|
≤14.0
|
|
Bulk Density
|
Electrode
|
g/cm3
|
≥1.53
|
≥1.52
|
|
Nipple
|
≥1.69
|
|
C.T.E.
|
Electrode
|
10-6/℃
|
≤2.9
|
|
Nipple
|
≤2.8
|
|
Ash
|
%
|
≤0.5
|
|
|
Allowable current load and current density (recommended) RP
|
Dia.
|
RP
|
|
mm
|
Current load
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
|
|
225
|
6000-8000
|
15-20
|
|
250
|
7000-10000
|
14-20
|
|
300
|
10000-13000
|
14-18
|
|
350
|
13500-18000
|
14-18
|
|
400
|
18000-23500
|
14-18
|
|
450
|
22000-27000
|
13-17
|
|
500
|
25000-32000
|
13-16
|
|
550
|
32000-40000
|
13-16
|
|
600
|
38000-47000
|
13-16
|
|
700
|
45000-54000
|
13-16
|
|
|
Technical Specification HP(High power)
|
Item
|
Unit
|
Nominal Diameter
(mm)
|
|
HP-A
|
HP-B
|
|
≤Φ400
|
≥Φ450
|
≤Φ350
|
≥Φ400
|
|
Resistance
|
Electrode
|
μΩ·m
|
≤6.5
|
≤7.5
|
|
Nipple
|
≤5.5
|
≤6.0
|
|
Bending Strength
|
Electrode
|
MPa
|
≥10.5
|
≥9.8
|
≥9.0
|
≥8.0
|
|
Nipple
|
≥16.0
|
≥13.0
|
|
Elastic Modulus
|
Electrode
|
GPa
|
≤12.0
|
≤12.0
|
|
Nipple
|
≤16.0
|
≤14.0
|
|
Bulk Density
|
Electrode
|
g/cm3
|
≥1.62
|
1.60
|
≥1.62
|
≥1.60
|
|
Nipple
|
≥1.73
|
≥1.72
|
|
C.T.E.
|
Electrode
|
10-6/℃
|
≤2.4
|
≤2.7
|
|
Nipple
|
≤2.2
|
≤2.5
|
|
Ash
|
%
|
≤0.3
|
≤0.3
|
|
|
Allowable current load and current density (recommended) HP
|
Dia.
|
HP
|
|
mm
|
Electric Arc Furnace
|
Refining Furnace
|
|
Current load
A
|
Current density
A/cm2
|
Current load
A
|
Current density
A/cm2
|
|
200
|
5500-9000
|
18-25
|
6000-10000
|
19-27
|
|
225
|
6500-10000
|
18-25
|
7000-10500
|
18-25
|
|
250
|
8000-13000
|
18-25
|
10000-15000
|
22-29
|
|
300
|
13000-17400
|
17-24
|
15000-20000
|
20-27
|
|
350
|
17500-24500
|
18-25
|
20000-28000
|
21-29
|
|
400
|
21500-31000
|
17-24
|
25000-35000
|
19-28
|
|
450
|
25500-39000
|
16-24
|
30000-45000
|
19-28
|
|
500
|
30000-48000
|
15-24
|
36000-54000
|
18-27
|
|
550
|
37000-57000
|
15-23
|
40000-60000
|
18-25
|
|
600
|
44000-67000
|
15-23
|
45000-65000
|
16-23
|
|
|
Technical Specification SHP(Super high power)
|
Item
|
Unit
|
Nominal Diameter
(mm)
|
|
≤Φ400
|
≥Φ450
|
|
Resistance
|
Electrode
|
μΩ m
|
≤6.2
|
≤6.5
|
|
Nipple
|
≤4.5
|
≤4.5
|
|
Bending Strength
|
Electrode
|
Mpa
|
≥10.5
|
≥10
|
|
Nipple
|
≥18
|
≥18
|
|
Elastic Modulus
|
Electrode
|
Gpa
|
≤14
|
≤14
|
|
Nipple
|
≤18
|
≤18
|
|
Bulk Density
|
Electrode
|
g/cm3
|
≥1.65
|
≥1.64
|
|
Nipple
|
≥1.75
|
≥1.75
|
|
C.T.E.
|
Electrode
|
10-6/℃
|
≤1.5
≤1.4
|
≤1.5
≤1.4
|
|
Nipple
|
|
Ash
|
Electrode
|
％
|
≤0.3
|
≤0.3
|
|
|
Allowable current load and current density (recommended) SHP
|
Dia.
|
SHP
|
|
Electric Arc Furnace
|
Refining Furnace
|
|
mm
|
Current load
A
|
Current density A/cm2
|
Current load
A
|
Current density A/cm2
|
|
250
|
9000-14400
|
20-28
|
9200-15100
|
21-30
|
|
300
|
14000-20000
|
19-28
|
16000-23000
|
22-32
|
|
350
|
18000-26000
|
18-26
|
20500-30000
|
21-31
|
|
400
|
23000-33000
|
18-26
|
26000-38000
|
20-30
|
|
450
|
27000-42000
|
17-26
|
31000-48000
|
19-29
|
|
500
|
32000-50000
|
16-25
|
36500-51000
|
18-28
|
|
550
|
35000-55000
|
14-22
|
40000-63000
|
16-26
|
|
600
|
37000-60000
|
13-20
|
42500-70000
|
15-24
|
|
|
Technical Specification UHP(Ultra high power)
|
Item
|
Unit
|
Nominal Diameter
(mm)
|
|
UHP
|
|
≤Φ400
|
≥Φ450
|
|
Resistance
|
Electrode
|
μΩ·m
|
≤5.5
|
|
Nipple
|
≤4.5
|
|
Bending Strength
|
Electrode
|
MPa
|
≥11.0
|
|
Nipple
|
≥20.0
|
|
Elastic Modulus
|
Electrode
|
GPa
|
≤14.0
|
|
Nipple
|
≤18.0
|
|
Bulk Density
|
Electrode
|
g/cm3
|
≥1.66
|
≥1.67
|
|
Nipple
|
≥1.75
|
|
C.T.E.
|
Electrode
|
10-6/℃
|
≤1.5
|
|
Nipple
|
≤1.4
|
|
Ash
|
%
|
≤0.3
|
|
|
Allowable current load and current density (recommended) UHP
|
Dia.
|
UHP
|
|
Electric Arc Furnace
|
Refining Furnace
|
|
mm
|
Current load
A
|
Current density A/cm2
|
Current load
A
|
Current density A/cm2
|
|
250
|
9200-15100
|
21-30
|
12000-18000
|
25-36
|
|
300
|
13000-22000
|
20-30
|
15300-22400
|
21-31
|
|
350
|
23000-32000
|
24-33
|
26000-35000
|
27-36
|
|
400
|
28000-41000
|
22-32
|
31000-44000
|
24-34
|
|
450
|
34000-48500
|
21-30
|
36000-49500
|
22-31
|
|
500
|
40000-58000
|
20-29
|
42000-60500
|
21-30
|
|
550
|
46000-65000
|
19-27
|
49000-70000
|
20-29
|
|
600
|
52000-75000
|
18-26
|
56000-81000
|
19-28
|
|
