This product is specially designed for high current density working conditions, with a rated working current density of up to 10-20 A/cm². It is mainly used in high-temperature industrial electric furnaces such as steelmaking arc furnaces, ladle refining furnaces, and electric arc furnaces. Thanks to its excellent electrical conductivity, mechanical strength, and thermal shock resistance, it enables efficient melting and stable operation of the electric furnaces. The product strictly complies with the national standard GB/T 24273-2017 and the international standard ASTM C651. It has stable performance and is compatible with various electric furnace equipment worldwide. It is a core consumable for industries such as metallurgy, chemical industry, and ferroalloy.
By using high-end raw materials and a mature full-process technology, the product quality is strictly controlled from the source. Quality inspection nodes are set up throughout the entire process:
Raw material selection: Select high-purity needle-like coke / petroleum coke with a fixed carbon content of ≥ 98.5%, sulfur content of ≤ 0.5%, and ash content of ≤ 0.3%. Combined with a special coal asphalt binder, it ensures the basic performance of conductivity and high-temperature resistance.
Coking treatment: The raw materials are coked at a temperature range of 1200~1400℃ for 24~48 hours, with the volatile matter reduced to less than 0.5%, improving the structural stability.
Product structure design
Electrode body: Standard cylindrical structure, with uniform conductive cross-section, ensuring no load imbalance in current transmission and no local overheating.
Graphite connector: High-strength graphite connector of the same material, matching the electrode body to ensure continuous current conduction and firm mechanical connection.
Thread system: Utilizes industrial-specific trapezoidal threads with a taper of 1:16, featuring strong locking force and large contact area, making it less likely to loosen or spark.
Standard lengths: 1500mm, 1800mm, 2000mm, and customization of non-standard lengths is supported.
Product Core Features and Advantages
Excellent Electrical Performance
Low resistivity, low power loss, stable transmission of high voltage and large current;
Strong current-carrying capacity, capable of enduring long-term operation under high current density, suitable for large-power electric furnaces;
The entire electrode is conductive evenly, without local hotspots, avoiding arc deviation and equipment failure.
Low loss, high economy
Extremely low ash content, reducing impurity contamination of molten steel and alloy melt, and improving product quality;
Excellent high-temperature oxidation resistance, with a side wall oxidation loss of ≤ 0.8mm/h at 1200℃ working conditions;
Good anti-spalling performance, not prone to slag dropping or corner cracking under high-temperature conditions;
The overall service life is 15% - 20% longer than that of ordinary electrodes, reducing procurement and downtime replacement costs.
Process and supporting advantages
Optional double-layer silicon carbide anti-oxidation coating, further reducing oxidation consumption by 30% to 40%;
Numerical control precision machining, surface roughness Ra ≤ 0.8 μm, high thread matching accuracy, excellent contact conductivity effect;
Each product is laser marked, batch traceability is possible, facilitating quality management for overseas customers.
Our Service
Providing solutions specifically for the steel smelting industry
01
✅ Strictly follow national and international standards, with full-process quality inspection, ensuring stable quality and compatibility with global electric furnace equipment.
02
✅ Deeply engaged in graphite electrode manufacturing for many years, with rich production experience and sufficient supply capacity.
03
✅ Provide professional technical support + complete foreign trade after-sales service, and fully connect with overseas customer demands throughout the process.
| Performance Index | Unit | High Power (HP) Graphite Electrode | Regular Power Graphite Electrode | Advantages in Application |
|---|---|---|---|---|
| Flexural Strength | MPa | ≥10.5 | ≥8.5 | Good resistance to bending and vibration, less prone to breakage |
| Compressive Strength | MPa | ≥45 | ≥35 | Stronger load-bearing capacity, anti-collision during hoisting and handling |
| Thermal Shock Resistance | / | Resist thermal cycling above 200℃ | Resist thermal cycling above 150℃ | No cracking or spalling under rapid temperature change inside furnace |
| Thermal Conductivity | W/(m·K) | 120~150 | 80~100 | Faster heat dissipation and higher melting efficiency |
| Test Item | Unit | HP Grade I | HP Grade II | Test Standard |
|---|---|---|---|---|
| Fixed Carbon Content | % | ≥99.85 | ≥99.80 | GB/T 3521-2023 |
| Electrical Resistivity | μΩ·m | ≤6.0 | ≤6.5 | ASTM C611 (Four-probe Method) |
| Bulk Density | g/cm³ | ≥1.78 | ≥1.75 | GB/T 24525-2009 (Hydrostatic Method) |
| Ash Content | % | ≤0.15 | ≤0.30 | GB/T 3521-2023 (High-temperature Ashing Method) |
| Open Porosity | % | 18~22 | 18~24 | GB/T 24525-2009 |
| Flexural Strength | MPa | ≥11.0 | ≥10.5 | GB/T 14390-2008 (Three-point Bending Method) |
| Compressive Strength | MPa | ≥48 | ≥45 | GB/T 14390-2008 |
| Young's Modulus | GPa | ≤10.0 | ≤11.0 | Ultrasonic Testing Method |
| Coefficient of Thermal Expansion (20~1000℃) | 10⁻⁶/℃ | ≤4.5 | ≤5.0 | Dilatometer Test |
| Max. Service Temperature (Inert Atmosphere) | ℃ | ≥2800 | ≥2600 | Thermal Analysis Test |
| Nominal Diameter | Max. DC Working Current | Max. AC Working Current | Recommended Furnace Capacity |
|---|---|---|---|
| 300mm | 50,000 A | 45,000 A | 50~60 Ton Furnace |
| 350mm | 65,000 A | 60,000 A | 60~80 Ton Furnace |
| 400mm | 80,000 A | 75,000 A | 80~100 Ton Furnace |
| 500mm | 100,000 A | 95,000 A | 100~120 Ton Furnace |
| 600mm | 120,000 A | 115,000 A | 120~150 Ton Furnace |
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