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350mm HP Graphite Electrode – High-Performance Solution for EAF and LF Applications
The 350mm HP graphite electrode is ideal for EAF steelmaking, LF secondary refining, and SAF alloy production, suitable for carbon steel and non-ferrous metal melting, ensuring stable arc performance and superior metal purity.
Description
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Product Overview
The 350mm High Power (HP) graphite electrode is specifically engineered for Electric Arc Furnaces (EAF), Ladle Furnaces (LF), and Submerged Arc Furnaces (SAF) requiring high electrical conductivity, superior thermal resistance, and mechanical strength under moderate to high current loads.
Manufactured from premium petroleum needle coke and low-ash coal tar pitch, the HP-grade electrode ensures excellent arc performance, operational stability, and low consumption during steel and alloy melting processes.
Through a precision-controlled manufacturing process—including forming, baking, pitch impregnation, high-temperature graphitization (>2800 °C), and CNC machining—the 350mm HP graphite electrode offers long service life, low joint resistance, and reliable dimensional consistency.
HP Graphite Electrode Parameters — 350mm
| 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 | — | 17400–24000 |
| Current Density | A/cm² | — | 17–24 |
| Actual Diameter | mm | Max 358 Min 352 | — |
| Actual Length | mm | 1800 customizable | — |
| Length Tolerance | mm | ±100 | — |
| Short Length | mm | -275 | — |
Key Features & Advantages
● Excellent Electrical Conductivity
Low resistivity ensures stable arc performance and reduced energy consumption per ton of steel.
● Outstanding Thermal Shock Resistance
Low coefficient of thermal expansion prevents cracking during rapid temperature changes.
● High Mechanical Strength
Superior flexural and compressive strength reduce breakage risks during handling and operation.
● Low Impurity Content
Controlled sulfur, ash, and volatiles improve steel cleanliness and minimize slag formation.
● Precision-Engineered Threads
CNC-machined nipples (3TPI, 4TPI, M60) ensure tight fitting and low contact resistance.
Application Scenarios
● Electric Arc Furnace (EAF) Steelmaking
Ideal for carbon steel and alloy steel melting with consistent arc behavior.
● Ladle Furnace (LF) Secondary Refining
Optimized for temperature control and desulfurization during secondary metallurgy.
● Submerged Arc Furnace (SAF)
Suitable for ferroalloy production including ferrosilicon, silicomanganese, and ferrochrome.
● Non-Ferrous Metal Melting
Applicable in aluminum, copper, and nickel smelting where purity and conductivity are critical.
Manufacturing Process & Quality Control
● Raw Materials:
High-purity petroleum needle coke and low-ash binder ensure consistent structural properties.
● Forming & Baking:
Electrodes are molded under high pressure and baked at ~900°C to increase density and strength.
● Impregnation & Graphitization:
Undergo pitch impregnation followed by high-temperature graphitization (>2800 °C) to enhance conductivity and thermal stability.
● CNC Machining:
All threads and bodies are precision-machined in compliance with IEC 60239 and ASTM C1234 standards.
● Testing & Certification:
Each batch undergoes non-destructive testing (NDT), mechanical property evaluation, and dimensional inspection.
End-User Benefits
● Lower Electrode Consumption Rate (ECR)
● Higher furnace productivity and reduced downtime
● Improved electrical efficiency and lower energy costs
● Cleaner steel output and minimized contamination
● Tight joint fit with reduced resistance through precision nipples
Conclusion
The 350mm HP graphite electrode represents a premium, high-efficiency solution for EAF and LF operators. Designed to deliver outstanding arc performance, low consumption, and metallurgical purity, it is a trusted choice in modern steelmaking and alloy production environments.
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