Copper rod
Copper rod
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  • Copper rod
  • Copper rod

Copper rod

Copper rods are rod-shaped conductive materials made from high-purity copper, serving as the core raw material for products such as wires and cables and enameled wires. Their key advantages include exceptionally high electrical and thermal conductivity, excellent ductility, and superior corrosion resistance.

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Copper rod

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sales@zmjsxc.cn

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  • Product Description

  • Copper rods are rod-shaped conductive materials made from high-purity copper, serving as the core raw material for products such as wires and cables and enameled wires. Their key advantages include exceptionally high electrical and thermal conductivity, excellent ductility, and superior corrosion resistance.

    Core Definition

    • Main materials: solid copper rods (copper content ≥99.9%), as well as brass and bronze alloy rods.
    • Key indicators: oxygen content (determines quality grade), resistivity, tensile strength

    Mainstream classification

    1. Oxygen-free copper rod (TU1/TU2)

    • Process: Top-Down Continuous Casting (produced under air-isolated conditions)
    • Oxygen content: ≤0.002% (20 ppm), TU1 ≤0.001%
    • Copper purity: ≥99.95% (TU1 ≥99.99%)
    • Features: Extremely high electrical conductivity (≥101% IACS), no hydrogen embrittlement, excellent weldability, and suitable for drawing into fine wires.
    • Applications: high-end cables, enameled wires, precision electronics, aerospace, and medical cables

    2. Low-oxygen copper rod (T2)

    • Process: Continuous Casting and Rolling (SCR)
    • Oxygen content: 200–450 ppm (0.02%–0.045%)
    • Features: low cost, high output, well-balanced performance, and meets general conductive requirements.
    • Applications: General-purpose wires and cables, building wiring, household appliances, electric motors, and copper busbars.

    Main Specifications

    • Common diameters: Φ8 mm, Φ12 mm, Φ16 mm, Φ17 mm (subsequently drawn into fine wires).
    • Condition: Soft (R) (annealed, easy to machine), Hard (Y) (high strength)

    Core Performance

    • Electrical Conductivity: Resistivity at 20°C ≤ 0.017241 Ω·mm²/m (National Standard)
    • Mechanical properties: tensile strength 295–365 MPa, elongation ≥25%
    • Processability: Excellent ductility; can be drawn into filaments thinner than 0.1 mm.
    • Corrosion resistance: A oxide film readily forms on the copper surface, providing resistance to atmospheric corrosion.

    Production process

    1. Upward Drawing Process (Oxygen-Free Rod): Electrolytic Copper → Melting → Holding at Temperature → Upward Drawing Continuous Casting → Wire Drawing → Finished Product (Φ8 mm)
    2. Continuous casting and rolling process (low-oxygen rod): electrolytic copper → smelting → continuous billet casting → hot rolling → cooling → finished product (Φ8 mm)

    Main Application Areas

    • Power: High-voltage/low-voltage cables, overhead conductors, busbars
    • Electronics: enameled wire, transformer windings, motor coils, printed circuit boards
    • Communications: coaxial cable, data cable, telephone line
    • Transportation: automotive wiring harnesses, high-speed rail/metro cables, and marine wiring
    • Construction: residential electrical wiring, lightning protection and grounding, HVAC piping

About Us

 

Hebei Zhongmai Metal Wire Co., Ltd.

Hebei Zhongmai Metal Wire Co., Ltd. was established in 2012 and is located on Landu Avenue in Jiajiakou Town, Ningjin County, Xingtai City. It is conveniently situated adjacent to the Ningjin-Dongqing-Yin Expressway and National Highway 308, with a well-developed transportation network that provides convenient support for logistics, transportation, and business expansion.

The company covers a total area of 26,680 square meters and currently employs over 80 people. Relying on its large-scale production base and a team of highly skilled professionals, the company has established an efficient and stable operational system. As a leading enterprise in the metal wire industry, the company has been deeply engaged in this sector for many years and has developed an integrated “production + sales” business model. Its core products include processed items such as copper wires, aluminum wires, stranded wires, and aluminum alloy conductors.

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