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Graphite electrodes

Petroleum coke and needle coke are the main raw materials used, along with coal pitch as binder. The material is then carbonized in a baking furnace and afterwards graphitized in an electric arc furnace. There are different quality levels available dividing electrodes into UHP, HP and RP grades. Graphite electrodes are the most suitable material to melt scraps, DRI, etc. by arc energy.

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ItemsPositionUnitRPHPUHP
Bulk DensityBodyg/cm31.54-1.651.60-1.701.64-1.76
Nipple1.64-1.691.70-1.801.70-1.80
ResistivityBodyμΩ·m8.5-11.06.5-7.55.5-6.5
Nipple7.0-9.06.0-6.54.5-5.5
Ash
Body%
0.2-0.50.2-0.50.2-0.5
Nipple0.2-0.50.2-0.50.2-0.5
Bending StrengthBodyMPa6.5-10.010.0-12.010.0-12.0
Nipple13.0-15.014.0-16.016.0-17.0
Compressive StrengthBodyGPa8.5-9.510.0-12.012.0-14.0
Nipple12.0-14.014.0-16.016.0-18.0
Thermal Expansion(100-600°C)Body×10-6/°C2.8-2.92.2-2.41.4-1.5
Nipple2.7-2.82.0-2.21.3-1.4
DiameterBodymm75-600200-600300-600
LengthNipplemm1600-18001800-24001800-2400
ScrewIEC,ISO,NEMA Standard,or per orders


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