Ultra High Power Graphite Electrodes UHP 300–600mm

Ultra High Power Graphite Electrodes are selected by furnace electrical load, electrode diameter and connection requirements rather than by the UHP grade name alone. The current product specification covers UHP electrode diameters from 300 to 600 mm, with corresponding electrical resistivity, mechanical strength, bulk density, thermal expansion and current-carrying data.

Before ordering, you should confirm the required diameter, operating current, electrode length, nipple connection and furnace conditions together. These parameters determine whether the electrode specification matches your EAF or LF equipment.

 

Electrode diameter and electrical load should be evaluated together. The current reference data covers 300-600 mm UHP graphite electrodes. As electrode diameter increases, the available current range generally increases as well, but the correct diameter should follow your furnace electrical system rather than size alone.

Nominal Diameter (mm)	Current-Carrying Capacity (A)	Current Density (A/cm²)
300	15000-22000	20-30
350	20000-30000	20-30
400	25000-40000	19-30
450	32000-45000	19-27
500	38000-55000	18-27
550	45000-70000	18-27
600	50000-97000	18-27

300-400mm UHP Graphite Electrodes

The current reference range increases from 15,000-22,000 A for 300 mm UHP electrodes to 25,000-40,000 A for 400 mm. These sizes should be checked against the actual furnace current, holder arrangement and electrode-column requirement.

450-500mm UHP Graphite Electrodes

The listed current range is 32,000-45,000 A for 450 mm and 38,000-55,000 A for 500 mm. The current-density range for the 500 mm specification is 18-27 A/cm².

550-600mm UHP Graphite Electrodes

The larger 550 mm and 600 mm specifications cover higher reference current ranges. A larger UHP electrode is not automatically the correct choice; furnace transformer capacity, operating current, holder dimensions and electrode-column configuration should be considered together.

 

A UHP graphite electrode specification should not be judged from current capacity alone. Electrical resistivity, flexural strength, elastic modulus, bulk density and coefficient of thermal expansion describe different electrical, mechanical and thermal characteristics of the electrode system.

Item		Unit	Nominal Diameter (mm)
			300-400	450-500	550-600
Electrical Resistivity Max	Electrode	μΩ·m	6.2	6.3	5.8
	Nipple		4.5	4.5	4.0
Flexural Strength Min	Electrode	MPa	11.5	11.5	11.0
	Nipple		20.0	20.0	22.0
Elastic Modulus Max	Electrode	GPa	14.0	14.0	14.0
	Nipple		20.0	20.0	22.0
Bulk Density Min	Electrode	g/cm³	1.71	1.70	1.68
	Nipple		1.76	1.78	1.80
C.T.E. Max (100°C-600°C)	Electrode	10¯6 /°C	1.5	1.5	1.5
	Nipple		1.4	1.4	1.3
Ash Max		%	0.3	0.3	0.3

The electrode and nipple values are shown separately because both parts contribute to the assembled electrode column. When comparing specifications, make sure the values refer to the same component and diameter range.

 

UHP graphite electrodes are consumed during furnace operation, so individual electrode sections are connected to form an electrode column. The connection uses a threaded socket in the electrode end together with a matching graphite nipple.

The nipple should therefore be confirmed together with the electrode rather than treated as an unrelated accessory.

 

UHP graphite electrodes are used where the furnace requires graphite electrodes to conduct electrical current and generate the arc used during melting or refining.

UHP Graphite Electrodes for Electric Arc Furnaces

For EAF operation, the UHP electrode diameter should be matched to the furnace electrical system, operating current and electrode holder. Current capacity and electrode dimensions should therefore be checked together.

UHP Graphite Electrodes for Ladle Furnaces

For LF refining, confirm the required electrode diameter, electrical load and column configuration according to the equipment specification. The UHP grade name alone does not determine whether a particular electrode size matches the furnace.

If you are comparing UHP with other electrode types, see our graphite electrode product range .

 

A useful UHP graphite electrode inquiry should start with the furnace requirement and electrode dimensions rather than only asking for a UHP price.

Please include:

1. UHP grade requirement;
2. electrode diameter;
3. required electrode length;
4. operating current or furnace information;
5. nipple and connection requirement;
6. quantity;
7. technical or inspection requirements;
8. packing requirement;
9. destination port.

Send UHP Diameter & Furnace Requirement

 

 

 

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