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HP graphite electrode

HP graphite electrode manufacturer
HP graphite electrode is used in a high-power smelting furnace and a low-load to medium-load ladle furnace. Electric arc furnace steelmaking is to introduce current into the steelmaking furnace through graphite electrodes, and the strong current passes through the gas at the lower end of the electrode to generate arc discharge. Then heat generated by the arc is used for smelting. It is suitable for High-power electric furnaces with high power, high voltage, and short angle.

What are HP graphite electrodes made of?

It is made of high-purity petroleum coke, needle coke, and coal tar pitch as raw materials. The product is calcined, extruded, roasted, impregnated, graphitized, and machined.  With low electrical resistance and high mechanical strength. It can be used in DC and AC electric arc furnaces and ladle refining furnaces for smelting various steel alloy sheets.

It has low resistivity and good mechanical strength and can reduce energy consumption and increase production efficiency. During production, steelworkers can improve thermal efficiency and process stability by carefully controlling the power input to an Electric Arc Furnace (EAF).

Key Features:

– High bulk density
– Superior heat conduction
– Relative high electric conductivity
– High high machining accuracy
– Faster and more efficient operation
– Longer lifespan


It is essential for steelmaking in Electric Arc Furnaces (EAF). They control steelmaking parameters such as temperature, power input, and oxygen content.  They are impregnated with high-quality petroleum coke, so it has high mechanical properties and low resistivity.

It allow current densities of 18-25A/cm2. Mainly used in various steelmaking processes, such as secondary refining, ladle metallurgy, and continuous casting. Also, they are used in specialized applications such as vacuum refining and producing stainless steel, specialty alloys, and other high-value products.


HP graphite electrode for AC arc furnace HP graphite electrode for EAF Graphite electrodes work with Arc furnace 


What are the properties of HP graphite electrodes?

It is a carbon-based material used as a conductor during the smelting process. They are energized to generate an arc and use high temperatures to melt the charge.

They have high power capacity and can carry higher current densities than RP grade. It has thermal shock resistance and oxidation resistance, thereby reducing power consumption and saving energy.

It is also offer excellent machinability and thermal conductivity. Strong flexural strength, can withstand extreme temperatures without breaking. During the production process, heat is transferred into the furnace by relying on the thermal effect generated by electric current.

As a leading graphite electrode manufacturer, we offer competitive prices on premium quality to provide you with cost-effective solutions for your smelting and casting needs.


Physical &Chemical Properties Of Electrode And Nipple

HP Graphite Electrode Unit Diameter
12”-16” 18”-22” 24”
Specific resistance Electrode μΩ·m


6.8 7.5 7.5
Nipple 6.2 6.3 6.3
Transverse strength Electrode ΜРa

10.5 10.8 8.5
Nipple 15.0 15.0 17.0
Elastic modulus Electrode GРa

12.0 ≤12.0 14.0
Nipple 16.0 16.0 16.0
Bulk Density Electrode g∕㎝3

1.68 1.65 1.60
Nipple 1.74 1.74 1.72


Electrode 10-6∕℃

2.3 2.3 2.4
Nipple 2.1 2.1 2.2
Ash content %

0.3 0.3 0.3


Allowable Current-Carrying Capacities

Nominal HP Graphite Electrodes
mm inch Current-Carrying


Current Density


300 12 13000~17400 17~24
350 14 17400~24000 17~24
400 16 21000~31000 16~24
450 18 25000~40000 15~24
500 20 30000~48000 15~24
550 22 37000~57000 15~23
600 24 44000-67000 15~23

What is graphite?


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