Graphite Electrode Rp Grade

We are a customer-oriented firm, we are engaged in manufacturing, exporting, distributing and supplying of Graphite Electrode RP Grade in Handan, Hebei, China.

Graphite electrode is made of high quality calcined petroleum coke,imported needle coke and modified coal asphalt,the grade are RP,HD(impregnation),HP and UHP graphite electrodes,the specification is A 75-700mm.
Graphite electrode produced by our company has the advantages of low resistivity,high electrical conductivity and thermal conductivity,good oxidation resistance,good thermal shock resistance,high mechanical strength,easy to machine,etc.
Graphite electrode is widely used to smelt the steel,alloy steel and other metal or nonmetal material in electric arc furnace.

Technical Data of RP Graphite Electrodes
ItemsClassificationUnitNominal Diameter (mm)
Quality Standard: GB/T YB/4088-2000
75-130150-225250-300350-450500-800
ResistivityElectrodeI IC.ma 10.0a 10.5a 10.5a 10.5a 10.5
Nipplea 8.0a 8.0a 8.5a 8.0a 8.0
Bending StrengthElectrodeMpaa 10.0a 10.0a 8.0a 7.0a 6.5
Nipplea 15.0a 15.0a 15.0a 15.0a 15.0
Younga s ModulusElectrodeGpaa 9.3a 9.3a 9.3a 9.3a 9.3
Nipplea 14.0a 14.0a 14.0a 14.0a 14.0
Bulk DensityElectrodeg/cm3a 1.58a 1.53a 1.58a 1.60a 1.60
Nipplea 1.70a 1.70a 1.70a 1.70a 1.70
CTE (100a -600a )ElectrodeA 10-6/a a 2.9a 2.9a 2.9a 2.9a 2.9
Nipplea 2.7a 2.7a 2.8a 2.8a 2.8
Ash ContentBoth%0.3-0.50.3-0.50.3-0.50.3-0.50.3-0.5
Recommended current load of RP Graphite Electrodes

GradeNominal Dia.Allowable current ACurrent density A/cm2
RP electrode200mm500i 690015i 21
250mm7000i 1000014i 20
300mm10000i 1300014i 18
350mm13500i 1800014i 18
400mm18000i 2350014i 18
450mm22000i 2700013i 17
500mm25000i 3200013i 16
550mm28000i 3400012i 14
600mm30000i 3600011i 13
650mm32000i 3900010i 12
700mm34000i 420009i 11