Name: China Customized Graphite Electrode Material Manufacturers Suppliers Factory - Low Price - ZhenAn International
Brand: ZhenAn
SKU: 284528875

High Quality UHP HP Grade Graphite Electrode

Item		Unit	Graphite Electrode
			RP	HP	UHP
			φ100-φ600	φ100-φ700	φ200-φ500	φ550-φ700
Resistivity	Electrode	uΩm	7.0-10.0	5.8-6.6	4.8-5.8	4.6-5.8
Resistivity	Nipple	uΩm	4.0-4.5	3.5-4.0	3.5-4.0	3.5-4.0
Modulus of Rupture	Electrode	Mpa	8.0-10.0	10.0-13.0	10.0-14.0	10.0-14.0
Modulus of Rupture	Nipple	Mpa	19.0-22.0	20.0-23.0	20.0-24.0	22.0-26.0
Young's Modulus	Electrode	GPa	7.0-9.3	8.0-12.0	9.0-13.0	10.0-14.0
Young's Modulus	Nipple	GPa	12.0-14.0	14.0-16.0	15.0-18.0	16.0-19.0
Bulk Density	Electrode	g/cm³	1.53-1.56	1.64-1.68	1.68-1.74	1.68-1.74
Bulk Density	Nipple	g/cm³	1.70-1.74	1.75-1.80	1.78-1.82	1.78-1.84
CTE (100-600°C)	Electrode	10-6/°C	2.2-2.6	1.6-1.9	1.1-1.4	1.1-1.4
CTE (100-600°C)	Nipple	10-6/°C	2.0-2.5	1.1-1.4	0.9-1.2	0.9-1.2
Ash		%	0.5	0.3	0.3	0.3

What are the key properties of graphite electrode material used in steelmaking?

The graphite electrode material used in steelmaking is a highly engineered form of carbon with specific properties that make it ideal for conducting electricity and withstanding the extreme conditions inside electric arc furnaces (EAFs). The key properties of this material include high electrical conductivity, low thermal expansion, excellent thermal conductivity, high mechanical strength, and exceptional resistance to thermal shock and oxidation.

Electrical Conductivity:

Graphite is an excellent conductor of electricity, which is essential for efficiently transferring high currents from the power supply to the furnace arc. Low electrical resistance minimizes energy loss as heat within the electrode itself, improving energy efficiency and reducing operational costs.

Thermal Conductivity:

High thermal conductivity allows the graphite electrode to distribute heat evenly along its length, preventing localized overheating and reducing the risk of thermal stress or cracking. This property is critical for maintaining the structural integrity of the electrode during operation.

Mechanical Strength:

Graphite electrodes must withstand significant mechanical stresses caused by their own weight, thermal expansion, and furnace vibrations. High mechanical strength ensures that the electrodes resist breakage and deformation under these conditions, contributing to longer service life.

Thermal Shock Resistance:

The material must endure rapid temperature changes without cracking or spalling. Graphite's inherent ability to resist thermal shock makes it well-suited for the dynamic environment of an EAF, where temperatures can fluctuate dramatically during the melting cycle.

Oxidation Resistance:

Although graphite naturally oxidizes at high temperatures, high-quality electrodes are often treated or manufactured to minimize oxidation rates, extending their lifespan and maintaining performance in oxygen-rich furnace atmospheres.

Purity:

High-purity graphite, typically made from refined petroleum coke and coal tar pitch, ensures minimal impurities that could contaminate the steel or affect electrode performance. Impurities can also reduce electrical and thermal properties.

Together, these properties make graphite electrode material uniquely suited for steelmaking, enabling efficient, reliable, and high-quality production in modern metallurgical processes.