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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 Ø75-700mm.

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

Items	Classification	Unit	Nominal Diameter (mm)
			Quality Standard: GB/T YB/4088-2000
			75-130	150-225	250-300	350-450	500-800
Resistivity	Electrode	μΩ.m	≦10.0	≦10.5	≦10.5	≦10.5	≦10.5
	Nipple		≦8.0	≦8.0	≦8.5	≦8.0	≦8.0
Bending Strength	Electrode	Mpa	≧10.0	≧10.0	≧8.0	≧7.0	≧6.5
	Nipple		≧15.0	≧15.0	≧15.0	≧15.0	≧15.0
Young’s Modulus	Electrode	Gpa	≦9.3	≦9.3	≦9.3	≦9.3	≦9.3
	Nipple		≦14.0	≦14.0	≦14.0	≦14.0	≦14.0
Bulk Density	Electrode	g/cm3	≧1.58	≧1.53	≧1.58	≧1.60	≧1.60
	Nipple		≧1.70	≧1.70	≧1.70	≧1.70	≧1.70
CTE (100℃-600℃)	Electrode	×10-6/℃	≦2.9	≦2.9	≦2.9	≦2.9	≦2.9
	Nipple		≦2.7	≦2.7	≦2.8	≦2.8	≦2.8
Ash Content	Both	%	0.3-0.5	0.3-0.5	0.3-0.5	0.3-0.5	0.3-0.5

Recommended current load of RP Graphite Electrodes
 

Grade	Nominal Dia.	Allowable current  A	Current density  A/cm2
RP electrode	200mm	500～6900	15～21
	250mm	7000～10000	14～20
	300mm	10000～13000	14～18
	350mm	13500～18000	14～18
	400mm	18000～23500	14～18
	450mm	22000～27000	13～17
	500mm	25000～32000	13～16
	550mm	28000～34000	12～14
	600mm	30000～36000	11～13
	650mm	32000～39000	10～12
	700mm	34000～42000	9～11