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400mm UHP Graphite Electrode – Advanced Ultra High Power Solution for Metallurgical Furnaces
The 400mm UHP graphite electrode is engineered for heavy-duty Electric Arc Furnaces (EAF), Ladle Furnaces (LF), and Submerged Arc Furnaces (SAF). It offers superior conductivity and thermal shock resistance, enabling rapid melting, reduced electrode consumption, and enhanced steel quality in advanced steel and alloy production.
Description
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Product Overview
The 400mm UHP (Ultra High Power) graphite electrode is specifically engineered for the most demanding operations in Electric Arc Furnaces (EAF), Ladle Furnaces (LF), and Submerged Arc Furnaces (SAF) applied in modern steelmaking and ferroalloy production. Manufactured using premium petroleum needle coke and low-sulfur coal tar pitch, the electrode is subjected to isostatic pressing under ultra-high pressure, multi-stage baking, and graphitization at temperatures exceeding 2800°C. Precision CNC machining ensures dimensional accuracy and optimized thread geometry, guaranteeing superior arc stability and minimal contact resistance.
Designed to withstand ultra-high current densities, the 400mm UHP electrode delivers excellent electrical conductivity, superior thermal shock resistance, and robust mechanical strength. Its low consumption rate and consistent performance make it indispensable for energy-efficient, high-capacity steel production facilities.
Key Technical Specifications (400mm UHP Electrode)
| Parameter | Unit | Electrode | Nipple |
| Resistivity | μΩ·m | 4.8 ~ 5.8 | 3.4 ~ 4.0 |
| Bending Strength | MPa | ≥ 12.0 | ≥ 22.0 |
| Elastic Modulus | GPa | ≤ 13.0 | ≤ 18.0 |
| Bulk Density | g/cm³ | 1.68 ~ 1.73 | 1.78 ~ 1.84 |
| Thermal Expansion Coefficient | 10⁻⁶/°C | ≤ 1.2 | ≤ 1.0 |
| Ash Content | % | ≤ 0.2 | ≤ 0.2 |
| Allowable Current | A | — | 25000 ~ 40000 |
| Current Density | A/cm² | — | 16 ~ 24 |
| Actual Diameter | mm | Max: 409 Min: 403 | — |
| Actual Length (Customizable) | mm | 1800 – 2400 | — |
| Length Tolerance | mm | ±100 | — |
| Short Ruler Length | mm | -275 | — |
Performance Advantages
● Delivers Ultra-High Electrical Conductivity enabling rapid and efficient heat transfer, reducing energy consumption during melting.
● Resists Thermal Shock, minimizing cracking and extending electrode life under frequent temperature fluctuations.
● Provides Superior Mechanical Strength for enhanced durability during handling and furnace operation.
● Features Low Impurity Levels, with minimal ash, sulfur, and volatile matter to improve molten steel purity and reduce slag formation.
● Precision CNC Machined Threads ensure tight, low-resistance electrode connections for consistent arc stability.
Application Scenarios
● Electric Arc Furnace (EAF) Steelmaking:Optimized for high-capacity scrap and direct reduced iron (DRI) melting, supporting rapid melting cycles and stable current input for maximum productivity.
● Ladle Furnace (LF) Secondary Refining:Provides precise temperature control and reduces reoxidation during secondary metallurgical processes for alloy and stainless steel production.
● Submerged Arc Furnace (SAF) Ferroalloy Production:Suitable for smelting high-demand ferroalloys such as ferrochrome, silicon manganese, and calcium carbide under sustained high thermal loads.
● Non-Ferrous Metal Smelting:Ideal for copper, aluminum, titanium, and other specialty alloy melting processes where contamination control and purity are critical.
Manufacturing & Quality Control
● Manufactured using premium petroleum needle coke with sulfur content ≤ 0.03%, ensuring a stable and high-quality graphite matrix.
● Subjected to high-pressure isostatic pressing and multi-stage baking up to 900°C for optimal density and dimensional stability.
● Ultra-high temperature graphitization (>2800°C) enhances crystalline structure, resulting in superior electrical and thermal properties.
● Precision CNC thread machining (3TPI / 4TPI / M72) guarantees perfect electrode-nipple fit and minimal contact resistance.
● Strict testing and compliance with ASTM C1234, IEC 60239, GB/T 20067 standards, including ultrasonic inspection, electrical resistivity, and mechanical strength tests.
End-User Benefits
● Dense, low-porosity structure reduces electrode consumption and operational costs significantly.
● Superior electrical conductivity shortens melting cycles, reducing energy consumption per ton of steel produced.
● Low impurity levels contribute to cleaner molten steel with fewer inclusions and improved alloy quality.
● High thermal and mechanical stability extends electrode life, minimizing furnace downtime and maintenance frequency.
Conclusion
The 400mm UHP graphite electrode represents the pinnacle of ultra-high power graphite technology, engineered for the most challenging metallurgical environments. Its exceptional electrical, thermal, and mechanical properties ensure optimal performance, reduced consumption, and enhanced steel quality—making it a critical consumable in advanced steel and ferroalloy production plants.
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