PRODUCTS

Electrode diameter and the allowable deviation
Unit: mm

Norminal Diameter

Actual Diameter(D)

Norminal Length

In

mm

Max

Min

Rough spot(B)

10''

250

256

251

249

1600/1800

12''

300

307

302

299

1600/1800/1900/2000

14''

350

357

352

349

1600/1800/1900/2000/2200

16''

400

409

403

400

1600/1800/1900/2000/2200/2400

18''

450

460

454

451

1600/1800/1900/2000/2200/2400

20''

500

511

505

502

1800/1900/2000/2200/2400

22''

550

562

556

553

1800/2000/2200/2400

24''

600

613

607

604

2000/2200/2400/2700

26''

650

663

657

654

2400/2700/3000

28''

700

714

708

705

2400/2700/3000

Electrode length and to allow deviations 
Unit: mm

Norminal Length

Tolerance

Shorter length tolerance

max

min

max

min

1600

+100

-100

-100

-275

1800

+100

-100

-100

-275

1900

+100

-100

-100

-275

2000

+100

-100

-100

-275

2200

+100

-100

-100

-275

2400

+100

-100

-100

-275

2700

+150

-150

-150

-300

3000

+150

-150

-150

-300

Note: each electrode to allow the short-foot does not exceed 15%

Cone size of graphite electrode joints
Unit: mm


Diameter

Nipple

Socket

Pitch

D

d2

L

l

d1

H

Tolerance:

Tolerance:

 

mm

in

(-0.30~0)

(-0.30~0)

(-1~0)

(0~0.3)

(0~7)

8.47

3TPI

225

9″

139.70

91.22

203.20

7

141.22

107.60

250

10″

155.57

104.20

220.00

157.09

116.00

300

12″

177.16

117.39

270.90

148.68

141.50

350

14″

215.90

150.48

304.80

217.42

158.40

400

16″

215.90

150.48

304.80

217.42

158.40

400

16″

241.30

170.23

338.70

242.82

175.30

450

18″

241.30

170.23

338.70

242.82

175.30

450

18″

273.05

199.17

355.60

274.57

183.80

500

20″

273.05

199.17

355.60

274.57

183.80

500

20″

298.45

221.73

372.60

299.97

192.20

550

22″

298.45

221.73

372.60

299.97

192.20

600

24″

336.55

245.73

457.30

338.07

234.60

3TPIL

350

14″

215.90

144.85

338.70

217.42

175.30

400

16″

241.30

167.43

355.60

242.82

183.80

450

18″

273.05

182.23

457.30

274.57

234.60

4TPI

200

8″

122.24

81.48

177.80

7

115.92

94.90

6.35

225

9″

139.70

98.94

177.80

133.38

94.90

250

10″

152.40

109.52

190.50

146.08

101.30

300

12″

177.80

130.69

215.90

171.48

114.00

350

14″

203.20

149.74

254.00

196.88

133.00

400

16″

222.25

160.32

304.80

215.93

158.40

450

18″

241.30

179.37

304.80

234.98

158.40

500

20″

269.88

199.49

355.60

263.56

183.80

550

22″

298.45

228.06

355.60

292.13

183.80

600

24″

317.50

247.11

355.60

311.18

183.80

650

26″

355.60

268.27

457.20

349.28

234.60

700

28″

374.65

287.32

457.20

368.33

234.60

4TPIL

300

12″

177.80

124.34

254.00

171.48

133.00

350

14″

203.20

141.27

304.80

196.88

158.40

400

16″

222.25

151.86

355.60

215.93

183.80

450

18″

241.30

170.91

355.60

234.98

183.80

500

20″

269.88

182.55

457.20

263.56

234.60

550

22″

298.45

211.12

457.20

292.13

234.60

600

24″

317.50

230.17

457.20

311.18

234.60

650

26″

355.64

251.38

558.80

349.28

285.40

700

28″

374.65

270.39

558.80

368.33

285.40

Specification

ITEM

UNIT

RP

IP

HP

SHP

UHP

250-400

450-600

250-400

450-500

550-600

250-400

450-600

250-400

450-600

300-400

450-600

Specific resistance not over

Electrode

µΩm

8.5

9.0

6.5

7.0

8.0

6.0

6.5

5.5

6.0

5.0

5.5

Nipple

6.0

5.5

5.0

4.5

4.0

Bending Strength
not below

Electrode

MPa

8.00

7.00

10.00

12.00

13.00

15.00

Nipple

16.00

18.00

20.00

22.00

24.00

Elastic modulus
not over

Electrode

GPa

9.30

12.00

12.00

12.00

14.00

Nipple

14.00

16.00

16.00

16.00

18.00

Ash
content not over

Electrode

%

0.30

Nipple

Bulk density
not below

Electrode

g/cm3

1.54

1.62

1.65

1.67

1.68

Nipple

1.70

1.72

1.74

1.75

1.76

(C.T.E)
not over

Electrode

10-61/℃

2.50

2.20

2.00

1.60

1.50

Nipple

2.00

1.80

1.60

1.40

1.20

Graphite electrode to allow the current load and current density (recommended)

Norminal Diameter

RP

HP

UHP

mm

Current load A

Current Density A/cm2

Current load A

Current DensityA/cm2

Current load A

Current Density A/cm2

250

7000-10000

14-20

8000-13000

18-25

9200-15100

21-30

300

10000-13000

14-18

13000-17400

17-24

13000-22000

20-30

350

13500-18000

14-18

17400-24000

17-24

20000-30000

20-30

400

18000-23500

14-18

21000-32000

16-24

25000-40000

19-30

450

22000-27000

13-17

25000-40000

15-24

32000-45000

19-27

500

25000-32000

13-16

30000-48000

15-24

38000-55000

18-27

550

32000-40000

13-16

37000-57000

15-23

48000-60000

18-24

600

38000-47000

13-16

44000-67000

15-23

52000-72000

18-24

700

45000-54000

13-16

54000-73000

15-23

62000-95000

18-24

Graphite electrodes are widely used in iron and steel, nonferrous metal smelting, as well as silicon, phosphorus smelting industry. We can provide various grades and specifications of the graphite electrodes, products with a low resistance, high physical density, oxidation resistance, and high precision machining to meet the needs of different users.