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Graphite Electrode (UHP)

Ultra-high power graphite electrode provided by HP Graphite Co., Ltd. is mainly specialized for electric arc furnace and ladle refining furnace. It is highly praised by the customers as the rare superior type of ultra-high power graphite electrode with optimal functional quality in the industry. The graphite electrodes provided by HP Graphite Co., Ltd.  are produced using the most advanced technologies, in strict accordance with world standards and have reached the world-class quality standard of SGL CARBON and Tokai Carbon. 

Characteristics of ultra-high power graphite electrodes: 

  • Superior electric conductivity 
  • World-class quality 
  • Complete ex-factory inspection 
  • Rate of finished products up to 99% 
  • Complete use instructions and all-round customer service 
  • Unconditional return is provided in case of quality problem by HP Graphite Co., Ltd. to completely eliminate your worries! 

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UHP electrode standard sizes range between diameter 350~700mm with lengths of 1600~2700mm.

Physical & Chemical Index

ITEMS

TYPE

ULTRA HIGH POWER

Ø200-500

Ø550-700

Resistance

μΩ.m (Max)

Electrode

5.5

Nipple

4.5

Density

g/cm³ (Min)

Electrode

1.68

1.7

Nipple

1.8

Flexure Strength

Mpa (Min)

Electrode

11.0

Nipple

20.0

Elastic Modulus

Gpa (Max)

Electrode

14.0

Nipple

22.0

Ash % (Max)

Electrode

0.1

Nipple

0.1

CTE (100-600℃)

100¯⁶/℃(Max)

Electrode

1.5

Nipple

1.4

Current Load

NOMINAL
DIAMETER

ULTRA-HIGH POWER ELECTRODE

MM

INCH

CURRENT LOAD (A)

CURRENT DENSITY (A/CM²)

250

10

8100-12200

20-30

300

12

15000-22000

20-30

350

14

20000-30000

20-30

400

16

25000-40000

19-30

450

18

32000-45000

19-30

500

20

38000-55000

18-27

550

22

45000-65000

18-27

600

24

50000-75000

18-26

650

25

60000-85000

18-25

700

28

70000-120000

18-30

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

Recommended reading

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