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400mm HP Graphite Electrode – Premium High-Power Solution for EAF, LF, and SAF Applications
Widely used in EAF, LF, and SAF applications, the 400mm HP graphite electrode offers excellent conductivity, thermal shock resistance, and mechanical strength—ensuring stable arc performance, lower energy consumption, extended electrode life, and improved efficiency in steel and alloy production.
Description
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Product Overview
The 400mm High Power (HP) graphite electrode is designed to meet the demanding requirements of modern Electric Arc Furnaces (EAF), Ladle Furnaces (LF), and Submerged Arc Furnaces (SAF). It offers superior electrical conductivity, excellent thermal shock resistance, and robust mechanical strength at medium to high current densities, making it a vital consumable for efficient steelmaking and ferroalloy production.
Manufactured from premium-grade petroleum needle coke and low-ash coal tar pitch, the 400mm HP electrode undergoes a rigorous production process—including high-pressure molding, controlled baking, multiple impregnation cycles, high-temperature graphitization (>2800°C), and precision CNC machining—to ensure consistent performance with minimal electrode consumption and joint resistance.
HP Graphite Electrode Parameters — 400mm
| Item | Unit | Electrode | Nipple |
| Resistivity | μΩ·m | 5.2 ~ 6.5 | 3.5 ~ 4.5 |
| Bending Strength | MPa | ≥ 11.0 | ≥ 20.0 |
| Elastic Modulus | GPa | ≤ 12.0 | ≤ 15.0 |
| Bulk Density | g/cm³ | 1.68 ~ 1.73 | 1.78 ~ 1.83 |
| Thermal Expansion CTE | 10⁻⁶/℃ | ≤ 2.0 | ≤ 1.8 |
| Ash Content | % | ≤ 0.2 | ≤ 0.2 |
| Allowable Current | A | — | 21000–31000 |
| Current Density | A/cm² | — | 16–24 |
| Actual Diameter | mm | Max 409 Min 403 | — |
| Actual Length | mm | 1800 customizable | — |
| Length Tolerance | mm | ±100 | — |
| Short Length | mm | -275 | — |
Key Features & Advantages
● Superior Electrical Conductivity
Low electrical resistivity ensures a stable and efficient arc, reducing energy consumption and optimizing furnace productivity.
● Enhanced Thermal Shock Resistance
Minimized CTE prevents cracking and extends electrode life during rapid temperature changes.
● High Mechanical Strength & Durability
Excellent flexural and compressive strength protects electrodes from breakage during handling and furnace operation.
● Ultra-Low Impurities
Strict control of ash, sulfur, and volatile matter reduces contamination and slag formation, improving metal purity.
● Precision CNC Machined Threads
Advanced CNC machining guarantees tight tolerances, secure joints, and minimal electrical resistance.
Expanded Application Scenarios
● Electric Arc Furnace (EAF) Steelmaking:
Optimized for melting carbon and alloy steels with stable arc performance under variable scrap conditions.
● Ladle Furnace (LF) Secondary Refining:
Supports precise temperature control, desulfurization, and alloying for improved steel quality.
● Submerged Arc Furnace (SAF) Ferroalloy Production:
Ideal for high-temperature ferroalloy manufacturing such as ferromanganese, ferrochrome, and silicomanganese, where electrode durability is essential.
● Non-Ferrous Metal Melting:
Used extensively in aluminum, copper, and nickel melting processes demanding high purity and stable electrical performance.
● Specialty Metallurgical Processes:
Applicable in carbon heating for chemical industries, silicon metal production, and electric smelting of refractory metals.
Manufacturing Process & Quality Assurance
● Raw Material Selection:
Premium petroleum needle coke with sulfur <0.03% and ash <0.25% ensures density and uniformity.
● Forming & Baking:
High-pressure molding followed by baking at ~900°C consolidates electrode structure.
● Multiple Impregnation Cycles:
Repeated pitch impregnation increases density and reduces porosity, lowering electrode consumption rate.
● Graphitization:
Graphitization above 2800°C enhances conductivity and thermal stability.
● CNC Machining & Threading:
Threads machined to IEC 60239 and ASTM C1234 standards ensure compatibility and low joint resistance.
● Comprehensive Testing:
Each batch undergoes NDT, mechanical property verification, and dimensional inspection for guaranteed quality.
End-User Benefits
● Reduced electrode consumption rate (ECR) lowers operational costs.
● Enhanced furnace productivity and minimized downtime.
● Improved electrical efficiency cuts energy costs.
● Cleaner melting yields higher metal purity and less slag.
● Reliable, precision-fit joints ensure consistent electrical contact and operational safety.
Conclusion
The 400mm HP graphite electrode is a premium, cost-effective solution engineered for advanced metallurgical applications requiring reliable electrical and thermal performance. Its optimized physical and chemical properties make it the electrode of choice for steelmakers and ferroalloy producers aiming for maximum efficiency, durability, and metal purity.
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