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High quality graphite electrode

High quality graphite electrode

Graphite electrode is made from the domestic first petroleum coke and high quality needle coke and widely used in the electric arc furnaces for production of alloy steels, metal and other nonmetallic materials etc. The graphite electrodes include: regular power, high power, super high power, ultra high power. The range of diameters covers from 200 mm to 700 mm. Our products own the following characteristics: low electric resistivity, good electric and thermal conductivity, high oxidation resistance, greater resistance to thermal and mechanical shock, high mechanical strength, high machining accuracy.


Physical and chemical index :

Items

Unit

RP

HP

UHP

250-300mm

350-550mm

200-400mm

450-550mm

300-400mm

450-550mm

Resistivity(MAX)

Electrode

μΩ·m

9.0

7

7.5

6.2

6.5

Nipple

8.5

6.5

5.5

Bending Strength(MIN)

Electrode

Mpa

7.8

6.4

10.5

9.8

10.5

10.0

Nipple

13.0

14.0

16.0

Elastic Modulus

Electrode

Gpa

9.3

12.0

14.0

Nipple

14.0

16.0

18.0

Bulk Density

Electrode

g/cm3

1.52

16.0

1.65

1.64

Nipple

1.68

17.0

1.72

1.70

Ash(MAX)

Electrode

%

0.5

0.3

0.3

Nipple

CTE(MAX)

Electrode

10-6/°C

2.9

2.4

1.5

Nipple

2.8

2.2

1.4


Tolerances of electrode diameter and length(mm)

Nominal Diameter

Actual Diameter

Length

Max

Min

Black surface min

250

256

251

248

1600/1800

300

307

302

299

1600/1800

350

357

352

349

1600/1800

400

409

403

400

1600/1800/2000/2200

450

460

454

451

1600/1800/2000/2200

500

511

505

502

1800/2000/2200/2400

550

562

556

553

1800/2000/2200/2400


Recommended current carrying capacity

Nominal

diameter

RP

HP

UHP

Electrical Arc furnace

Electrical arc furnace

Ladle Refining

furnace

Electrical arc furnace

Ladle Refining

furnace

Current Carrying Capacity

Current Density

Current Carrying Capacity

Current Density

Current Carrying Capacity

Current Density

Current Carrying Capacity

Current Density

Current Carrying Capacity

Current Density

in

mm

A

A/cm²

A

A/cm²

A

A/cm²

A

A/cm²

A

A/cm²

12

300

1100-

1500

15-21

13000- 17500

18-25

15000- 21000

21-29

14

350

15000- 20000

15-20

17500- 24500

18-25

20000- 28000

21-29

22000- 31000

23-32

24000- 33000

25-34

16

400

1900- 26000

15-20

21500- 32000

17-25

24000- 35000

19-28

28000- 41000

22-32

31000- 44000

24-34

18

450

23000 31000

14-19

26000- 40500

16-25

29000- 45000

18-28

33000- 46000

20-28

36000- 49000

22-30

20

500

2800- 3600

14-18

32000- 50000

16-25

32000- 50000

17-27

38000- 56000

19-28

42000- 60000

21-30

22

550

32000 42000

13-17

37000- 57000

15-23

37000- 57000

16-25

45000- 65000

18-26

50000- 70000

20-28


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