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HP Graphite Electrodes

HP Graphite Electrodes

HP graphite electrode is the conducting element for electric arc furnaces steelmaking. It is made of petroleum coke, needle coke, coal pitch and produced by a series of strict production processes. High-current lines insert through the graphite electrode port inside the furnace body. This will releases electric energy in the arc furnace to heat the furnace. The demand for the larger diameter electrodes has been increasing as EAF furnace sizes become larger. Graphite electrodes with diameter of 500 mm or 600 mm have become increasingly popular in recent years.

HP Graphite Electrodes Specification

Technical Specification of HP Graphite Electrode
DiameterResistance
(≤, µΩ·m)
Density
(≥, g/cm3)
Flexure Strength
(≥, MPa)
Elastic Modulus
(≤, GPa)
Ash Content
(≤, %)
CTE
(100 °C – 600 °C)
(≤, 10-6/°C)
Current Load
(A)
Current Density
(A/cm2)
inchmm
82006.51.6210.5120.32.45500–900018–25
92256.51.6210.5120.32.46500–1000018–25
102506.51.6210.5120.32.48000–1300018–25
123006.51.6210.5120.32.413000–1740017–24
143506.51.6210.5120.32.417400–2400017–24
164006.51.6210.5120.32.421000–3100016–24
184506.51.609.8120.32.425000–4000015–24
205006.51.609.8120.32.430000–4800015–24
225506.51.609.8120.32.437000–5700015–23
246006.51.609.8120.32.444000–6700015–23
Graphite Electrode Size & Tolerance
Diameter (mm)Length (mm)
Nominal DiameterActual DiameterNominal LengthToleranceShort Length
(inch)(mm)(max.)(min.)(rough spot)
82002052001971600±100-275
92252302252221600
102502562512481600/1800
123003073022991600/1800
143503573523491600/1800
164004094034001600/1800/2000/2200
184504604544511600/1800/2000/2200
205005115055021800/2000/2200/2400
225505625565531800/2000/2200/2400
246006136076042000/2200/2400
Surface Characteristics
  • The electrode surface should exhibit no more than two defects or holes. The maximum permissible size for these imperfections is indicated in the provided chart.
  • Transverse cracks must not be present on the electrode surface. In the case of longitudinal cracks, their length should not exceed 5% of the electrode’s circumference, while their width should range between 0.3 to 1.0 mm.
  • The width of any darkened area on the electrode surface should not exceed 1/10 of the electrode’s circumference, and its length should remain below 1/3 of the total electrode length.
SpecificationDefect Dimension
Nominal Diameter of Graphite Electrode (mm)
300–400450–600
Diameter (mm)20–40
(< 20 mm should be negligible)
30–50
(< 30 mm should be negligible)
Depth (mm)5–10
(< 5 mm should be negligible)
10–15
(< 10 mm should be negligible)

Why Choose AGRM HP Graphite Electrodes

Features:
  • Enhanced longevity through anti-oxidation treatment.
  • Notable attributes include high-purity, high-density, and robust chemical stability.
  • Superior machining precision resulting in excellent surface finish.
  • Impressive mechanical strength coupled with low electrical resistance.
  • Resilience against cracking and spalling.
  • Exceptional resistance to oxidation and thermal shock.
Applications:

Graphite electrodes serve a wide spectrum of purposes, including the production of alloy steels and various metallic and non-metallic materials.

  • Integral to DC electric arc furnaces.
  • Indispensable for AC electric arc furnaces.
  • Essential for submerged arc furnaces.

These characteristics and applications collectively underscore the versatile role that graphite electrodes play in diverse industrial processes and operations.

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