Shandong Rongfu new material technology Co,Ltd

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 4.6～6.2 4.5～6.0 4.5～5.8
Nipple 3.5～5.0 3.4～4.5 3.3～4.3
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 1.66～1.73 1.68～1.74
Nipple 1.75～1.82 1.78～1.85
Ash Content Electrode % ≤0.3
Nipple
The Coefficient of Thermal Expansion(CTE) Electrode 10-6/℃ 1.20～1.50 1.10～1.50
Nipple 1.10～1.40 1.00～1.30

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