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RP Graphite Electrodes

Regular-power graphite electrode(RP) is processed by pressing, roasting, impregnating and graphitizing processes with high-quality petroleum coke, asphalt. It has high flexural strength, good seismic performance, and small consumption. It is widely used in electric arc furnaces of steel company, and silicon company and so on.

Technical Quota of Graphite Electrodes

ITEM

UNIT

RP

HP

UHP

3-24inch 
φ75-600mm

4-24inch 
φ300-600mm

12-20inch 
φ300-500mm

22-28inch 
φ550-700mm

Resistivity

Electrode

μΩ·m

7.0-9.0

5.5-6.5

4.8-5.8

4.5-5.5

Nipple

4.0-4.5

3.5-4.0

3.0-4.0

2.5-3.5

Bending stregth

Electrode

Mpa

8.0-12.0

10.0-14

10.0-15.0

12.0-16.0

Nipple

19.0-22.0

20.0-23.0

20.0-24.0

22.0-25.0

Elastic Modulus

Electrode

Gpa

7.0-11.0

80.-12.0

9.0-13.0

10.0-14.0

Nipple

12.0-14.0

14.0-16.0

15.0-18.0

16.0-19.0

Bulk density

Electrode

g/cm3

1.60-1.65

1.68-1.72

1.70-1.75

1.70-1.75

Nipple

1.75-1.8

1.85-1.8

1.78-1.82

1.8-1.85

Ash

Electrode

%

0.3

0.3

0.2

0.2

Nipple

CTE

Electrode

10-6/℃ 
100-600℃

2.0-2.4

1.6-1.9

1.1-1.4

1.1-1.4

Nipple

1.8-2.2

1.1-1.4

0.9-1.2

0.9-1.2

Graphite electrodes allow current loading and current density

Item

Nominal diameter(mm)

Allowed current loadA

Current densityA/cm2

RP Graphite Electrodes

100

15002400

1930

150

35004900

2028

200

50006900

1622

250

700010000

1420

300

1000013000

1418

350

1350018000

1418

400

1800023500

1418

450

2200027000

1317

500

2500032000

1316

600

3500041000

1315

HP Graphite Electrodes

300

1300017400

1724

350

1740024000

1724

400

2100031000

1624

450

2500040000

1524

500

3000048000

1524

UHP Graphite Electrodes

300

1500022220

2032

350

2000030300

2032

400

2500040400

1932

450

3200045450

1929

500

3800055550

1829

550

4200064640

1728

600

5000076760

1727

700

67000101000

1727

Specifications Allowance of Graphite Electrodes

Diameter mm

Length mm

Nominal Diameter

Actual Diameter

Nominal Length

Tolerance

mm

inch

max (mm)

min mm

mm

inch

Nominal Lengthmm

Short Lengthmm

200

8

205

200

160

1800

2100

60

72

84

±100

-275

250

10

256

251

300

12

307

302

350

14

357

352

400

16

409

403

1800

2100

2400

2700

72

84

96

108

450

18

460

454

500

20

511

505

600

24

613

607

700

28

713

707

The Form Size of Cone Nipple

 

Item

Nominal diameter(mm)

IEC

Nipple

Nipple hole

Thread pitch

d

L

D1

S

RP/HP/UHP Graphite Electrodes 

225

139T3N

139.70

203.20

131.27

107.60

8.47

250

155T3N

155.57

220.00

147.14

116.00

300

177T3N

177.16

270.90

168.73

141.50

350

215T3N

215.90

304.80

207.47

158.40

400

215T3N

215.90

304.80

207.47

158.40

400

241T3N

241.30

338.70

232.87

175.30

450

241T3N

241.30

338.70

232.87

175.30

450

273T3N

273.05

355.60

264.62

183.80

500

273T3N

273.05

355.60

264.62

183.80

500

298T3N

298.45

372.60

290.02

192.20

550

298T3N

298.45

372.60

290.02

192.20

RP/ HP Graphite Electrodes

75

46T4N

46.04

76.20

39.72

44.10

6.35

100

69T4N

69.85

101.60

63.53

56.80

130

79T4N

79.38

127.00

73.06

69.50

150

92T4N

92.08

139.70

85.76

75.90

200

122T4N

122.24

177.80

115.92

94.9

225

139T4N

139.70

177.80

133.38

94.90

250

152T4N

152.40

190.50

146.08

101.30

RP/HP/UHP Graphite Electrodes

300

177T4N

177.80

215.90

171.48

114.00

350

203T4N

203.20

254.00

196.88

133.00

400

222T4N

222.25

304.80

215.93

158.40

400

222T4L

222.25

355.60

215.93

183.80

450

241T4N

241.30

304.80

234.98

158.40

450

241T4L

241.30

355.60

234.98

183.80

500

269T4N

269.88

355.60

263.56

183.80

500

269T4L

269.88

457.20

263.56

234.60

550

298T4N

298.45

355.60

292.13

183.80

550

298T4L

298.45

457.20

292.13

234.60

600

317T4N

317.50

355.60

311.18

183.80

600

317T4L

317.50

457.20

311.18

234.60

700

374T4N

374.65

457.20

368.33

234.60

700

374T4L

374.65

558.80

368.33

285.40