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Graphite Electrodes

The main function of graphite electrode is to conduct electricity when smelting metal in electric arc furnace (EAF). Due to the increasing proportion of steel smelted by EAF in the world, the use of EAF to smelt steel plate and other secondary formed steel is the main project to consume graphite electrode. In addition, graphite electrodes are also used in smelting furnaces to melt non-ferrous metals, ceramic products and waste recycling industries.

What grade of graphite electrode can our company provide?

A particular application may require different grades of electrodes to match existing furnaces and reduce overall melting costs. Generally, according to the quality level, graphite electrode can be divided into the following three standards:

Related Reading

Graphite electrode producted of petroleum coke combined with pitch after calcination, through molding, baking, impregnation and graphitization. 

Level of graphite electrodes

UHP (GE)
Price for MOQ: $3,520
Ultra-high power graphite electrode pro
Graphite Electrodes (HP) products.jpg

Physical & Chemical Index

ITEMS

REGULAR POWER

HIGH POWER

ULTRA HIGH POWER

Ø75-200

Ø250-600

Ø200-400

Ø450-600

Ø200-500

Ø550-700

 

Resistance μΩ.m (Max)

Electrode

8.5

6.5

5.5

Nipple

6.5

5.5

4.5

Density g/cm³ (min)

Electrode

1.6

1.58

1.68

1.65

1.68

1.7

Nipple

1.75

1.78

1.8

Flexure Strength Mpa (min)

Electrode

10.0

8.0

10.5

9.8

11.0

Nipple

15.0

17.0

20.0

Elastic Modulus Gpa (max)

Electrode

9.3

14.0

14.0

Nipple

14.0

16.0

22.0

Ash Content
     % (max)

Electrode

0.1

0.1

0.1

Nipple

0.1

0.1

0.1

CTE (100-600℃)
     100-⁶/℃(max)

Electrode

2.9

2.4

1.5

Nipple

2.7

2.2

1.4

Current Load

NOMINAL DIAMETER

 

REGULAR POWER

 

HIGH POWER

 

ULTRA HIGH POWER

 

MM

Current Load (A)

Current Density (A/cm²)

Current Load (A)

Current Density (A/cm²)

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

5500-9000

18-25

 

 

250

7000-10000

14-20

8000-13000

18-25

8100-12200

20-30

300

10000-13000

14-18

13000-17400

17-24

15000-22000

20-30

350

13500-18000

14-18

17400-24000

17-24

20000-30000

20-30

400

18000-23500

14-18

21000-31000

16-24

25000-40000

19-30

450

22000-27000

13-17

25000-40000

15-24

32000-45000

19-30

500

25000-32000

13-16

30000-48000

15-24

38000-55000

18-27

550

28000-34000

12-14

34000-53000

14-22

45000-65000

18-27

600

30000-36000

11-13

38000-58000

13-21

50000-75000

18-26

650

32000-39000

10-12

41000-65000

12-20

60000-85000

18-25

700

34000-42000

9-11

45000-72000

12-19

70000-120000

18-30

Surface Quality

1、There are no more than two defects or holes on the surface of the electrode and the size shall not exceed the value in the following table.
2、There is no transverse crack or longitudinal crack with width of 0.3-1.0 on the surface of the electrode. The length of longitudinal crack is not more than 5% of the perimeter of the electrode. The crack with width less than 0.3mm shall be ignored.
3、The width of black skin area on the surface of the electrode is less than 1/10 of the perimeter of the electrode and its length is less than 1/3 of the length of the electrode. 


SPECIFICATION

SIZE

NOMINAL DIAMETER OF GRAPHITE ELECTRODE (MM)

75-225

250-400

450-800

Diameter(mm)

10-20

20-30

30-40

Depth(mm)

3-5

5-10

10-15

Graphite Electrode Size & Tolerance 

DIAMETER (MM)

LENGTH (MM)

Nominal Diameter

Actual Diameter

 

Nominal Length

 

Tolerance

 

Short Length

Inch

mm

Max

Min

Rough spot

3

75

78

73

72

1000/1200/1400/1600

 

 

 

 

 

 

 

±100

 

 

 

 

 

 

 

-275

4

100

103

98

97

1000/1200/1400/1600

5

130

132

127

126

1000/1200/1400/1600

6

150

154

149

146

1200/1400/1600/1800

7

175

179

174

171

1200/1400/1600/1800

8

200

205

200

197

1600/1800

9

225

230

225

222

1600/1800

10

250

256

251

248

1600/1800/2000

12

300

307

302

299

1600/1800/2000/2200

14

350

358

352

349

1600/1800/2000/2200

16

400

409

403

400

1600/1800/2000/2200

18

450

460

454

451

1600/1800/2000/2200

20

500

511

505

502

1800/2000/2200/2400

22

550

562

556

553

1800/2000/2200/2400

24

600

613

607

604

2000/2200/2400/2700

26

650

663

659

656

2400/2700

28

700

714

710

707

2400/2700

Coupling Torque Reference For Nipple & Electrode

 

 ELECTRODE DIAMETER

 Inch

 8

 9

 10

 12

 14

 16

 18

 20

 22

 24

 mm

 200

 225

 250

 300

 350

 400

 450

 500

 550

 600

 BREAKAWAY TORQUE

 n.m

200
     -  260

300
     -  340

400
     -  450

550
     -  650

800
     -  950

900
     -   1100

1100
     -   1400

1500
     -   2000

1900
     -   2500

2400
     -   3000


HP (GE)
Price for MOQ: $3,360
HP GRAPHITE Co., Ltd. is an industry lea
Graphite Electrodes (UHP) products illustration3.jpg

Physical & Chemical Index

ITEMS

REGULAR POWER

HIGH POWER

ULTRA HIGH POWER

Ø75-200

Ø250-600

Ø200-400

Ø450-600

Ø200-500

Ø550-700

 

Resistance μΩ.m (Max)

Electrode

8.5

6.5

5.5

Nipple

6.5

5.5

4.5

Density g/cm³ (min)

Electrode

1.6

1.58

1.68

1.65

1.68

1.7

Nipple

1.75

1.78

1.8

Flexure Strength Mpa (min)

Electrode

10.0

8.0

10.5

9.8

11.0

Nipple

15.0

17.0

20.0

Elastic Modulus Gpa (max)

Electrode

9.3

14.0

14.0

Nipple

14.0

16.0

22.0

Ash Content
     % (max)

Electrode

0.1

0.1

0.1

Nipple

0.1

0.1

0.1

CTE (100-600℃)
     100-⁶/℃(max)

Electrode

2.9

2.4

1.5

Nipple

2.7

2.2

1.4

Current Load

NOMINAL DIAMETER

 

REGULAR POWER

 

HIGH POWER

 

ULTRA HIGH POWER

 

MM

Current Load (A)

Current Density (A/cm²)

Current Load (A)

Current Density (A/cm²)

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

5500-9000

18-25

 

 

250

7000-10000

14-20

8000-13000

18-25

8100-12200

20-30

300

10000-13000

14-18

13000-17400

17-24

15000-22000

20-30

350

13500-18000

14-18

17400-24000

17-24

20000-30000

20-30

400

18000-23500

14-18

21000-31000

16-24

25000-40000

19-30

450

22000-27000

13-17

25000-40000

15-24

32000-45000

19-30

500

25000-32000

13-16

30000-48000

15-24

38000-55000

18-27

550

28000-34000

12-14

34000-53000

14-22

45000-65000

18-27

600

30000-36000

11-13

38000-58000

13-21

50000-75000

18-26

650

32000-39000

10-12

41000-65000

12-20

60000-85000

18-25

700

34000-42000

9-11

45000-72000

12-19

70000-120000

18-30

Surface Quality

1、There are no more than two defects or holes on the surface of the electrode and the size shall not exceed the value in the following table.
2、There is no transverse crack or longitudinal crack with width of 0.3-1.0 on the surface of the electrode. The length of longitudinal crack is not more than 5% of the perimeter of the electrode. The crack with width less than 0.3mm shall be ignored.
3、The width of black skin area on the surface of the electrode is less than 1/10 of the perimeter of the electrode and its length is less than 1/3 of the length of the electrode. 


SPECIFICATION

SIZE

NOMINAL DIAMETER OF GRAPHITE ELECTRODE (MM)

75-225

250-400

450-800

Diameter(mm)

10-20

20-30

30-40

Depth(mm)

3-5

5-10

10-15

Graphite Electrode Size & Tolerance 

DIAMETER (MM)

LENGTH (MM)

Nominal Diameter

Actual Diameter

 

Nominal Length

 

Tolerance

 

Short Length

Inch

mm

Max

Min

Rough spot

3

75

78

73

72

1000/1200/1400/1600

 

 

 

 

 

 

 

±100

 

 

 

 

 

 

 

-275

4

100

103

98

97

1000/1200/1400/1600

5

130

132

127

126

1000/1200/1400/1600

6

150

154

149

146

1200/1400/1600/1800

7

175

179

174

171

1200/1400/1600/1800

8

200

205

200

197

1600/1800

9

225

230

225

222

1600/1800

10

250

256

251

248

1600/1800/2000

12

300

307

302

299

1600/1800/2000/2200

14

350

358

352

349

1600/1800/2000/2200

16

400

409

403

400

1600/1800/2000/2200

18

450

460

454

451

1600/1800/2000/2200

20

500

511

505

502

1800/2000/2200/2400

22

550

562

556

553

1800/2000/2200/2400

24

600

613

607

604

2000/2200/2400/2700

26

650

663

659

656

2400/2700

28

700

714

710

707

2400/2700

Coupling Torque Reference For Nipple & Electrode

ELECTRODE DIAMETER

 Inch

 8

 9

 10

 12

 14

 16

 18

 20

 22

 24

 mm

 200

 225

 250

 300

 350

 400

 450

 500

 550

 600

BREAKAWAY TORQUE

 n.m

200
     -  260

300
     -  340

400
     -  450

550
     -  650

800
     -  950

900
     -   1100

1100
     -   1400

1500
     -   2000

1900
     -   2500

2400
     -   3000


RP (GE)
Price for MOQ: $3,050
Regular power graphite electrode is main
Graphite Electrodes (HP) products illustration3.jpg

Physical & Chemical Index

ITEMS

REGULAR POWER

HIGH POWER

ULTRA HIGH POWER

Ø75-200

Ø250-600

Ø200-400

Ø450-600

Ø200-500

Ø550-700

 

Resistance μΩ.m (Max)

Electrode

8.5

6.5

5.5

Nipple

6.5

5.5

4.5

Density g/cm³ (min)

Electrode

1.6

1.58

1.68

1.65

1.68

1.7

Nipple

1.75

1.78

1.8

Flexure Strength Mpa (min)

Electrode

10.0

8.0

10.5

9.8

11.0

Nipple

15.0

17.0

20.0

Elastic Modulus Gpa (max)

Electrode

9.3

14.0

14.0

Nipple

14.0

16.0

22.0

Ash Content
     % (max)

Electrode

0.1

0.1

0.1

Nipple

0.1

0.1

0.1

CTE (100-600℃)
     100-⁶/℃(max)

Electrode

2.9

2.4

1.5

Nipple

2.7

2.2

1.4

Current Load

NOMINAL DIAMETER

 

REGULAR POWER

 

HIGH POWER

 

ULTRA HIGH POWER

 

MM

Current Load (A)

Current Density (A/cm²)

Current Load (A)

Current Density (A/cm²)

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

5500-9000

18-25

 

 

250

7000-10000

14-20

8000-13000

18-25

8100-12200

20-30

300

10000-13000

14-18

13000-17400

17-24

15000-22000

20-30

350

13500-18000

14-18

17400-24000

17-24

20000-30000

20-30

400

18000-23500

14-18

21000-31000

16-24

25000-40000

19-30

450

22000-27000

13-17

25000-40000

15-24

32000-45000

19-30

500

25000-32000

13-16

30000-48000

15-24

38000-55000

18-27

550

28000-34000

12-14

34000-53000

14-22

45000-65000

18-27

600

30000-36000

11-13

38000-58000

13-21

50000-75000

18-26

650

32000-39000

10-12

41000-65000

12-20

60000-85000

18-25

700

34000-42000

9-11

45000-72000

12-19

70000-120000

18-30

Surface Quality

1、There are no more than two defects or holes on the surface of the electrode and the size shall not exceed the value in the following table.
2、There is no transverse crack or longitudinal crack with width of 0.3-1.0 on the surface of the electrode. The length of longitudinal crack is not more than 5% of the perimeter of the electrode. The crack with width less than 0.3mm shall be ignored.
3、The width of black skin area on the surface of the electrode is less than 1/10 of the perimeter of the electrode and its length is less than 1/3 of the length of the electrode. 


SPECIFICATION

SIZE

NOMINAL DIAMETER OF GRAPHITE ELECTRODE (MM)

75-225

250-400

450-800

Diameter(mm)

10-20

20-30

30-40

Depth(mm)

3-5

5-10

10-15

Graphite Electrode Size & Tolerance 

DIAMETER (MM)

LENGTH (MM)

Nominal Diameter

Actual Diameter

 

Nominal Length

 

Tolerance

 

Short Length

Inch

mm

Max

Min

Rough spot

3

75

78

73

72

1000/1200/1400/1600

 

 

 

 

 

 

 

±100

 

 

 

 

 

 

 

-275

4

100

103

98

97

1000/1200/1400/1600

5

130

132

127

126

1000/1200/1400/1600

6

150

154

149

146

1200/1400/1600/1800

7

175

179

174

171

1200/1400/1600/1800

8

200

205

200

197

1600/1800

9

225

230

225

222

1600/1800

10

250

256

251

248

1600/1800/2000

12

300

307

302

299

1600/1800/2000/2200

14

350

358

352

349

1600/1800/2000/2200

16

400

409

403

400

1600/1800/2000/2200

18

450

460

454

451

1600/1800/2000/2200

20

500

511

505

502

1800/2000/2200/2400

22

550

562

556

553

1800/2000/2200/2400

24

600

613

607

604

2000/2200/2400/2700

26

650

663

659

656

2400/2700

28

700

714

710

707

2400/2700

Coupling Torque Reference For Nipple & Electrode

 

 ELECTRODE DIAMETER

 

Inch

 8

 9

 10

 12

 14

 16

 18

 20

 22

 24

 mm

 200

 225

 250

 300

 350

 400

 450

 500

 550

 600

 BREAKAWAY TORQUE

 n.m

200
     -  260

300
     -  340

400
     -  450

550
     -  650

800
     -  950

900
     -   1100

1100
     -   1400

1500
     -   2000

1900
     -   2500

2400
     -   3000


Graphite electrode nipple (RP,HP, UHP);Auxiliary 

Graphite electrode nipple thumbnail2.png

Graphite electrode nipple is fitting for graphite electrode. Graphite electrode generally has higher requirements for nipple, which has a special production process, can be divided into (regular power graphite electrode nipple, high power graphite electrode nipple, and ultra high power graphite electrode nipple).

In order to prevent the connection of graphite electrode from loosening, all graphite electrode nipples produced by HP Graphite Co., Ltd. have been specially processed. The specifications of conical graphite electrode nipple (Japanese nipple) refer to the figure below.

Detailed parameter of 3TPI NIPPLE

NOMINAL 

DIAMETER


NIPPLE


SOCKET


PITCH


D

L

d2

I

d1

H

200

122.24

 

 

 

 

 

 

 

 

0-0.50

177.80

 

 

 

 

 

 

 

 

0-1

80.00

 

 

 

 

 

 

 

 

0-5

 

 

 

 

 

 

 

 

<7

115.92

 

 

 

 

 

 

 

 

+0.500

94.90

 

 

 

 

 

 

 

 

+70

 

 

 

 

 

 

 

 

6.35

225

139.70

177.80

97.46

133.38

94.90

250

152.40

190.50

108.00

146.08

101.30

300

177.80

215.90

129.20

171.48

114.00

350

203.20

254.00

148.20

196.88

133.00

400

222.25

304.80

158.80

215.93

158.40

400

222.25

335.60

150.00

215.93

183.80

450

241.30

304.80

177.90

234.98

158.40

450

241.30

355.60

169.42

234.98

183.80

500

269.88

355.60

198.00

263.56

183.80

500

269.88

457.20

181.08

263.56

234.60

550

298.45

355.60

226.58

292.13

183.80

550

298.45

457.20

209.65

292.13

234.60

600

317.50

355.60

245.63

311.18

183.80

600

317.50

457.20

228.70

311.18

234.60

650

355.60

457.20

266.79

349.28

234.60

650

355.60

558.80

249.86

349.28

285.40

700

374.65

457.20

285.84

368.33

234.60

700

374.65

558.80

268.91

368.33

285.40


Detailed parameter of 4TPI NIPPLE

NOMINAL 

DIAMETER

NIPPLE

                    SOCKET

PITCH

D

L

d2

I

d1

H

225

139.70

 

 

 

 

0-0.50

203.20

 

 

 

 

0-1

90.73

 

 

 

 

0-5

 

 

 

 

<10

131.27

 

 

 

 

+0.500

107.60

 

 

 

 

+70

 

 

 

 

8.47

250

155.57

220.00

103.80

147.14

116.00

300

177.16

270.90

116.90

168.73

141.50

350

215.90

304.80

150.00

207.47

158.40

400

215.90

304.80

150.00

207.47

158.40

400

241.30

338.70

169.80

232.87

175.30

450

241.30

338.70

169.80

232.87

175.30

450

273.05

355.60

198.70

264.62

183.80

500

273.05

355.60

198.70

264.62

183.80

500

298.45

372.60

221.30

290.02

192.20

550

298.45

372.60

221.30

290.02

192.20


Electrode Nipple Installation Instructions


Electrode nipple installation instructions image1.png

1. Before installing the graphite electrode nipple, the nipple hole shall be cleaned with the compressed air. 

Electrode nipple installation instructions image2.png

2. Center line shall be kept consistent during electrode connection.

Electrode nipple installation instructions image3.png

3. Electrode holder shall be located outside the two warning lines of the nipple connection part.

Electrode nipple installation instructions image4.png

4. Before the electrode is tightened, the dust on its end face shall be removed with the compressed air.

HP Graphite Target

Focus on service, pay attention to in the process of using products, help customers to solve the problem.

Strict Quality Control System

From raw materials to products, we strictly monitor the quality of production, directly remove

unqualified products to eliminate your worries.


Material Selection Principle

"Quality First, Price Second": We have 19 years industry experience, numerous material suppliers and partners to ensure the quality of raw materials and proper prices.


Well-developed Sales Solution

We have free customer consultation service to provide optimal solution for customers.  


After-sales Service

HP Graphite Co., Ltd. will provide free installation & adjustment for the first-time customers, and provide solutions within 48 hours.


Emergency Solutions

HP Graphite Co., Ltd. provides emergency solutions after the accident and takes necessary measures to provide assistance according to the situation.

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Graphite Electrode Nipples

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Graphite Powders

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Graphite Crucibles

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Graphite Rods

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Graphite Blocks

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Graphite Molds

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Graphite Columns

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If you have any questions about graphite products, submit the form below to us or you can also contact us directly. 

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If you have any questions about graphite products, submit the form below to us or you can also contact us directly.

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