Products Description
Oxygen-free copper rod refers to a copper rod with extremely low oxygen content (typically ≤0.003%), prepared from high-purity electrolytic copper through processes such as vacuum smelting or inert gas protection smelting. It has the following features:
High Electrical Conductivity: Purity ≥99.97%, conductivity ≥100% IACS, suitable for scenarios requiring excellent conductivity.
Superior Workability: Good ductility, can be processed into thin wires, cables, etc., with strong weldability and corrosion resistance.
Low Oxygen Content: Almost free of oxides, avoiding performance degradation caused by oxidation during high-temperature processing of ordinary copper rods.
Application Fields
Power Industry: Manufacturing ultra-high voltage cables, transformer winding wires, transmission conductors, etc.Electronics and Electricals: Producing precision electronic components, integrated circuit leads, high-frequency cables, etc.
Special Materials: Used for high-reliability conductive components in aerospace and military industries, as well as raw materials for high-purity alloys.
Production Process
The mainstream process is: electrolytic copper raw material → vacuum smelting (or inert gas protection) → continuous casting and rolling → surface treatment (anti-oxidation) → finished product.
| Parameter Category | Common Specifications/Parameter Values |
| Material Standards | - China: GB/T 5231-2022 (T1, TU1, TU2, etc., where TU1 and TU2 are oxygen-free copper) |
| - International: ASTM B187, JIS C1020, etc. | |
| Purity | Copper (Cu) ≥99.97%, oxygen (O) ≤0.003%, total impurity content ≤0.03% |
| Diameter Range | - Conventional: φ6.0mm~φ30.0mm |
| - Customized: φ0.5mm~φ50.0mm (adjusted according to processing requirements) | |
| Electrical Conductivity | ≥100% IACS (at 20℃) |
| Mechanical Properties | - Tensile strength: ≥200MPa (soft state); ≥300MPa (hard state) |
| - Elongation: ≥30% (soft state); ≥10% (hard state) | |
| Surface Quality | Smooth without burrs, oxide layers, or cracks; anti-oxidation can be enhanced by tin plating, silver plating, etc. |
| Packaging Method | Coiled packaging (usually 500kg~3000kg per coil), wrapped with moisture-proof paper and steel strips, or customized as required |
| Implementation Standards | - Domestic: GB/T 13808-2013 Copper and Copper Alloy Rods |
| - Industry standards: JB/T 4670-2013, etc. |
Differences Between Oxygen-free Copper Rod and Ordinary Copper Rod
| Comparison Item | Oxygen-free Copper Rod | Ordinary Copper Rod (e.g., Electrical Copper Rod) |
| Oxygen Content | ≤0.003% | 0.02%~0.04% (containing copper oxide impurities) |
| Conductivity | ≥100% IACS | 97%~99% IACS |
| Workability | Resistant to oxidation during high-temperature processing, suitable for fine drawing | Prone to oxidation at high temperatures, limited drawing precision |
| Application Scenarios | High-end cables, electronic components, military industries, etc. | Ordinary wires, cables, general electrical components |
about us
GNEE is a leading manufacturer and global supplier of high-quality, precision-engineered copper products. We specialize in providing a comprehensive range of copper solutions tailored to meet the rigorous demands of various industries worldwide, including HVAC/R, automotive, construction, electrical engineering, and industrial machinery.
Our Extensive Product Portfolio:
Copper Tubes & Pipes:
We supply a full spectrum of copper tubes, including Round Pipes, Square Pipes, Welded Pipes, Seamless Pipes, Heat Exchanger Tubes, and Condenser Tubes, designed for superior thermal conductivity and corrosion resistance.
Copper Sheets & Plates:
Our flat-rolled products range from delicate Copper Foils and Thin Sheets to heavy-duty Plates and Circles (Round Plates), ideal for fabrication, roofing, and electrical applications.
Copper Bars & Rods:
We offer Copper Bars in various profiles such as Round Bars, Square Bars, and Hexagonal Bars, providing excellent machinability and strength for precision parts.
Copper Wires & Strips:
Our product line also includes high-conductivity Copper Wires and finely manufactured Copper Strips, essential for electrical components and connectors.
All our products are manufactured to international quality standards, with a strong focus on common American grades and ASTM specifications to ensure global compatibility and performance. Our key materials include:
C11000 (Electrolytic Tough Pitch - ETP Copper)
C10200 (Oxygen-Free Copper - OFC)
C12200 (Phosphorus Deoxidized Copper, DHP)
C10100 (Oxygen-Free Electronic Copper - OFE)
C26000 (Cartridge Brass, 70/30)
C27200 (Brass, 65/35)
C44300, C68700 (Admiralty Brass)
C70600 (Copper Nickel, 90/10)
C71500 (Copper Nickel, 70/30)
These materials conform to critical standards such as ASTM B111 (Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock), ASTM B68 (Seamless Copper Tube), ASTM B75 (Seamless Copper Tube), ASTM B88 (Seamless Copper Water Tube), ASTM B152 (Copper Sheet, Plate, Strip, and Rolled Bar), ASTM B187 (Copper Bus Bar, Rod, and Shapes), and ASTM B601 (Temper Designations for Copper and Copper Alloys).
