Shandong Rongfu new material technology Co,Ltd

300-500mm HP graphite electrode,HP Graphite Electrode,HP Graphite Electrodes For Arc Furnaces,HP Graphite Electrode Manufacture
HP Graphite Electrode
HP Graphite Electrodes For Arc Furnaces
HP Graphite Electrode Manufacture
Electric resistivity : 5.5-6.8
Bending strength: >=10.0
Elastic Modulus: <=13
Bulk density:1.62-1.70
Ash: <=0.3
CTE: 1.80-2.20
High power graphite electrode is a graphite electrode with allowable current density between 18-25A/cm2. HP graphite electrode  mainly used in high power steelmaking electric arc furnace.
Physical and Chemical Index of  Hign Power Graphite Electrode:
Item  Unit HP
300～500 550～700
Electric Resistivity  Electrode uΩ.m 5.5～6.8 5.5～7.0
Nipple 4.0～5.5
Bending Strength Electrode MPa ≥10.0 ≥8.5
Nipple ≥18.0
Modulus of Elasticity Electrode GPa ≤13.0
Nipple ≤15.0
Bulk Density Electrode g/cm3 1.62～1.70
Nipple 1.72～1.80
Ash Content Electrode % ≤0.3
Nipple
The Coefficient of Thermal Expansion(CTE) Electrode 10-6/℃ 1.80～2.20
Nipple 1.50～1.80

High Power Graphite Electrode Current Carrying Capacity
Norminal Diameter HP
Current Carrying Capacity Current Density
inch mm A A/cm2
12 300 13000～17400 17～24
14 350 17400～24000 17～24
16 400 21000～31000 16～24
18 450 25000～40000 15～24
20 500 30000～48000 15～24
22 550 34000～53000 14～22
24 600 38000～58000 13～21
28 700 45000～72000 12～19
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