Graphite Electrodes

min-energy-ag-graphite-electrodesGraphite electrodes are widely used in iron and steel, nonferrous metal smelting, as well as silicon, phosphorus smelting industry. We can provide various grades and specifications of the graphite electrodes, products with a low resistance, high physical density, oxidation resistance, and high precision machining to meet the needs of different users.

Graphite Electrode Diameter Tolerance

Norminal Diameter
Actual Diameter(D)
Norminal Length
In
mm
Max
Min
Rough spot(B)
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

Graphite Electrodes Length Tolerance

Norminal 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

Dimension of Tapered Nipples

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

Properties

Item
Unit
Norminal Diameter
UHP
HP
RP
≤Φ400
≥Φ450
≤Φ400
≥Φ450
≤Φ300
≥Φ350
Resistance
E
μΩ·m
≤5.5
≤6.5
≤8.5
N
≤4.5
≤5.5
≤6.5
Bending Strength
E
MPa
≥11.0
≥10.5
≥9.8
≥8.5
≥7.0
N
≥20.0
≥16.0
≥15.0
Elastic Modulus
E
GPa
≤14.0
≤12.0
≤9.3
N
≤18.0
≤16.0
≤14.0
Bulk Density
E
g/cm3
≥1.66
≥1.67
≥1.62
1.60
≥1.53
≥1.52
N
≥1.75
≥1.73
≥1.69
CTE.
E
10-6/℃
≤1.5
≤2.4
≤2.9
N
≤1.4
≤2.2
≤2.8
Ash
%
≤0.3
≤0.3
≤0.5

Suggested Current Capacity and Current Density

Norminal Diameter
RP
HP
UHP
mm
Current load
A
Current Density A/cm2
Current load
A
Current Density A/cm2
Current load
A
Current Density A/cm2
200
5000-6900
15-21
5500-9000
18-25
250
7000-10000
14-20
8000-13000
18-25
9200-15100
21-30
300
10000-13000
14-18
13000-17400
17-24
13000-22000
20-30
350
13500-18000
14-18
17400-24000
17-24
20000-30000
20-30
400
18000-23500
14-18
21000-32000
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
32000-40000
13-16
37000-57000
15-23
48000-60000
18-24
600
38000-47000
13-16
44000-67000
15-23
52000-72000
18-24
700
45000-54000
13-16
54000-73000
15-23
62000-95000
18-24