HP Graphite Electrode

◎ Higher purity, higher density, and great chemical stability;

◎ Low CTE, resistance to cracking, spalling and thermal shock;

◎ Higher mechanical strength and lower electrical resistivity;

◎ Advanced antioxidant treatment process, low consumption, and long operation life.

Application

High Power (HP) Graphite Electrodes are widely used in various DC/AC high power electric arc furnaces, ladle refining furnaces for smelting various alloy steels, etc.

Selection

Graphite electrodes are selected based on some of the following application considerations:
• Furnace design
• Scrap requirements
• Charging practice
• Burner/Oxygen usage
• Water spray rings
• Fume control system
• Meltdown/Refine/Tap-to-Tap Time
• Power level
• Slag practice

Physical & Chemical Properties of HP Graphite Electrodes

Items	Classification	Unit	Nominal Diameter (mm)
Items	Classification	Unit	200-400	450-500	550-600
Resistivity	Electrode	μΩm ≤	7.0	7.5	7.5
Resistivity	Nipple	μΩm ≤	6.3	6.3	6.3
Bending Strength	Electrode	Mpa ≥	10.5	10.0	8.5
Bending Strength	Nipple	Mpa ≥	17.0	17.0	17.0
Young’s Modulus	Electrode	Gpa ≤	14.0	14.0	14.0
Young’s Modulus	Nipple	Gpa ≤	16.0	16.0	16.0
Bulk Density	Electrode	g/cm3 ≥	1.60	1.60	1.60
Bulk Density	Nipple	g/cm3 ≥	1.72	1.72	1.72
CTE（100℃-600℃）	Electrode	×10-6/℃ ≤	2.4	2.4	2.4
CTE（100℃-600℃）	Nipple	×10-6/℃ ≤	2.2	2.2	2.2
Ash Content	Electrode	% ≤	0.5	0.5	0.5
Ash Content	Nipple	% ≤	0.5	0.5	0.5

Recommended current load of HP Graphite Electrodes

Grade	Nominal Dia.	Allowable current A	Current density A/cm2
HP electrode	200mm	5500～9000	18～25
	250mm	8000～13000	18～25
	300mm	13000～17400	17～24
	350mm	17400～24000	17～24
	400mm	21000～31000	16～24
	450mm	25000～40000	15～24
	500mm	30000～48000	15～24
	550mm	34000～53000	14～22
	600mm	38000～58000	13～21