300-500mm UHP graphite electrode,UHP Graphite Electrodes

300-500mm UHP graphite electrode,UHP Graphite Electrodes,Oxidation Resistance Graphite Electrode,UHP Graphite Electrodes Manufacturer

UHP Graphite Electrodes

Oxidation Resistance Graphite Electrode

UHP Graphite Electrodes Manufacturer

Electric resistivity : 4.6-6.2

Bending strength: >=10.5

Elastic Modulus: <=14

Bulk density:1.66-1.73

Ash: <=0.3

CTE:1.20-1.50

Ultra high power graphite electrode is a graphite electrode with allowable current density greater than 25A/cm2 . UHP graphite electrode mainly used in ultra-high power steelmaking electric arc furnace.

Ultra High Power Graphite Electrode Current Carrying CapacityUltra High Power Graphite Electrode Current Carrying Capacity

Physical and Chemical Index of Ultra high Power  Graphite Electrode

Item 

Unit

UHP

300~500

550~600

700~800

Electric Resistivity 

Electrode

uΩ.m

     

Nipple

     

Bending Strength

Electrode

MPa

≥10.5

≥10.0

≥10.0

Nipple

≥20.0

≥22.0

≥23.0

Modulus of Elasticity

Electrode

GPa

≤14.0

≤14.0

≤14.0

Nipple

≤20.0

≤22.0

≤22.0

Bulk Density

Electrode

G/cm3

   

Nipple

   

Ash Content

Electrode

%

≤0.3

Nipple

The Coefficient of Thermal Expansion(CTE)

Electrode

10-6/℃

   

Nipple

   

 

UHP Graphite Electrode Current Carrying Capacity

Norminal Diameter

UHP

Current Carrying Capacity

Current Density

inch

mm

A

A/cm2

12

300

15000~22000

20~30

14

350

20000~30000

20~30

16

400

25000~40000

19~30

18

450

32000~45000

19~27

20

500

38000~55000

18~27

22

550

45000~65000

18~27

24

600

50000~75000

18~26

28

700

70000~120000

18~25

32

800

 

Tolerance of Graphite Electrode Diameter and Length(mm) 

Nominal Diameter

Actural diameter

Length

in

mm

max

min

Black surface min

12

300

307

302

299

1800/2000

14

350

358

352

349

1800/2000/2200

16

400

409

403

400

1800/2000/2200

18

450

460

454

451

1800/2000/2200

20

500

511

505

502

2000/2200/2400

22

550

562

556

553

2000/2200/2400/2700

24

600

613

607

604

2200/2400/2700/3000

28

700

714

710

707

2200/2400/2700/3000

29

800

816

812

809

2200/2400/2700/3000

 

Permissible Deviation of Graphite Electrode Length (mm)

Nominal Length

Standard Deviation

Short Length Deviation

max

min

max

min

1800

+100

-100

-100

-275

2000

+100

-100

-100

-275

2200

+100

-100

-100

-275

2400

+100

-100

-100

-275

2700

+200

-150

-150

-275

3000

+200

-150

-150

-300




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