Graphite Electrode (RP)

Regular power graphite electrode is mainly used in EAF steelmaking. We are an industry leader in the production, sales, export and supply of graphite electrodes for a wide range of applications. Our products have excellent electrical conductivity, and perform well in harsh smelting conditions.


RP electrode standard sizes range between diameter 75 to 960mm with lengths of 1000~2200mm.



Detailed specification:

The following are the specific parameters of regular power graphite electrode products.


Physical & Chemical Index

ITEMS

TYPE

REGULAR POWER

Ø75-200

Ø250-600

Resistance

μΩ.m (Max)

Electrode

8.5

Nipple

6.5

Density

g/cm³ (Min)

Electrode

1.6

1.58

Nipple

1.75

Flexure Strength

Mpa (Min)

Electrode

10.0

8.0

Nipple

15.0

Elastic Modulus

Gpa (Max)

Electrode

9.3

Nipple

14.0

Ash % (Max)

Electrode

0.1

Nipple

0.1

CTE (100-600℃)

100¯⁶/℃(Max)

Electrode

2.9

Nipple

2.7

Current Load

NOMINAL
DIAMETER

REGULAR POWER

MM

INCH

CURRENT LOAD (A)

CURRENT DENSITY (A/CM²)

75

3

1000-1400

22-31

100

4

1500-2400

19-30

130

5

2200-3400

17-26

150

6

3000-4500

16-25

200

8

5500-9000

18-25

250

10

8000-13000

18-25

300

12

13000-17400

17-24

350

14

17400-24000

17-24

400

16

21000-31000

16-24

450

18

25000-40000

15-24

500

20

30000-48000

15-24

550

22

34000-53000

14-22

600

24

38000-58000

13-21

650

25

41000-65000

12-20

700

28

45000-72000

12-19

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

Surface Quality

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

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



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