300-500mm Rp Graphite Electrode

By monitoring the development of the market, we are betrothed in manufacturing and exporting an exclusive array of 300-500mm RP Graphite Electrode in Shouguang, Shandong, China.

Electric resistivity : 7.5-8.6
Bending strength: >=7.5
Elastic Modulus:<=9
Bulk density:1.54-1.62
Ash:<=0.3
CTE: 2.20-2.60

Regular power graphite electrode is a graphite electrode with allowable current density lower than 17A/cm2. RP graphite electrode is mainly used in the ordinary power electric furnace for steelmaking, silicon smelting and yellow phosphorus refining etc.
Physical and Chemical Index of Hign Power Graphite Electrode:

Item UnitHP
300i 500550i 700
Electric Resistivity ElectrodeuIC.m5.5i 6.85.5i 7.0
Nipple 4.0i 5.5
Bending StrengthElectrodeMPaa Y10.0a Y8.5
Nipple a Y18.0
Modulus of ElasticityElectrodeGPaa 13.0
Nipple a 15.0
Bulk DensityElectrodeg/cm31.62i 1.70
Nipple 1.72i 1.80
Ash ContentElectrode%a 0.3
Nipple
The Coefficient of Thermal Expansion(CTE)Electrode10-6/a 1.80i 2.20
Nipple 1.50i 1.80

High Power Graphite Electrode Current Carrying Capacity
Nominal DiameterHP
Current Carrying CapacityCurrent Density
inchmmAA/cm2
i 1740017i 24
i 2400017i 24
i 3100016i 24
i 4000015i 24
i 4800015i 24
i 5300014i 22
i 5800013i 21
i 7200012i 19
32800i i

Tolerance of Graphite Electrode Diameter and Lengthi mm)
Nominal DiameterActural diameterLength
inmmmaxminBlack surface min
22991800/2000
23491800/2000/2200
34001800/2000/2200
44511800/2000/2200
55022000/2200/2400
65532000/2200/2400/2700
76042200/2400/2700/3000
07072200/2400/2700/3000
28092200/2400/2700/3000

Permissible Deviation of Graphite Electrode Length (mm)
Nominal LengthStandard DeviationShort Length Deviation
maxminmaxmin
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