LIANYUNGANG DAPU METAL CO.LTD
+86 15751198808

High Purity Copper Rods
ETP & Oxygen-Free Grade

Engineered for superior electrical conductivity (>100% IACS) and wire drawing performance. Produced via continuous casting and rolling technology to meet ASTM B49 standards.

⚡ Conductivity: 100-101% IACS
💎 Purity: 99.90% - 99.99% Cu
📏 Size: 8mm - 30mm (Custom)
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High Conductivity 8mm Copper Rod Coil for Wire Drawing
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Technical Specifications (ASTM B49)

Compare the chemical composition and physical properties of our ETP and OFC grades to ensure optimal performance for your wire drawing or electrical applications.

1. Chemical Composition & Grade Comparison

Unit: %
Grade Designation Copper (Cu) Min Oxygen (O2) Conductivity (IACS) Application Focus
ETP (C11000)
Electrolytic Tough Pitch		 99.90% 0.02% - 0.04% 100% - 101% General Wire, Cables, Busbars
OFC (C10100/10200)
Oxygen-Free Copper		 99.99% < 0.001% (10ppm) ≥ 101% - 102% High-end Electronics, Audio, Vacuum

2. Mechanical Properties (Typical)

Property Value (Soft/Annealed) Value (Hard Drawn) Relevance
Tensile Strength 220 - 250 MPa 350 - 450 MPa Determines load-bearing capacity
Elongation > 35% < 5% Critical for wire drawing (prevents breakage)
Density 8.89 g/cm³ Weight calculation

Available Dimensions & Supply Form

Standard Diameters: 8.0mm, 12.5mm, 16.0mm, 20.0mm, 25.0mm (Custom up to 30mm)
Packaging: Coils (2-4 Tons/Coil), Palletized, Shrink-wrapped for moisture protection.
Surface Finish: Pickled, Bright, Oxidation-free finish available.

Which Copper Rod Should You Choose?

Selecting between ETP and OFC depends on your specific manufacturing requirements regarding conductivity, ductility, and cost.

Best Seller: Industry Standard

ETP Copper Rod (C11000)

Electrolytic Tough Pitch (ETP) copper is the most widely used grade for electrical applications worldwide. Produced via our advanced continuous casting and rolling process, it maintains a small amount of oxygen (0.02-0.04%) which actually improves conductivity by scavenging impurities.

Why buy ETP? It offers the perfect balance of high conductivity (100% IACS) and cost-efficiency. It is the ideal raw material if you are manufacturing standard power cables or enamelled wires.

  • Application: Power transmission cables, telecommunication wires, motors, transformers.
  • Processing: Excellent drawability for fine wire production.
  • Standard: ASTM B49 / C11000.
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ETP C11000 Copper Rod for Cable Manufacturing
Premium Grade: High Performance

Oxygen-Free Copper Rod (OFC)

Oxygen-Free Copper (C10100/C10200) is refined under a strictly controlled reducing atmosphere to lower oxygen content to below 10ppm (0.001%). This elimination of oxygen is critical for applications requiring extreme ductility or resistance to hydrogen embrittlement.

When to upgrade? If your product will be used in vacuum environments, requires heating in hydrogen atmospheres (which causes ETP copper to crack), or demands higher signal fidelity (audio/video), OFC is the necessary choice.

  • Application: High-end audio cables, vacuum electronics, busbars for hydrogen cooling.
  • Advantage: Immunity to hydrogen embrittlement; superior surface finish.
  • Performance: Conductivity > 101% IACS.
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Oxygen Free Copper Rod C10200 for High End Electronics

Advanced Manufacturing Process

Our copper rods are produced using state-of-the-art Continuous Casting and Rolling (CCR) technology. This ensures a consistent grain structure and superior surface quality essential for high-speed wire drawing.

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1. Melting & Refining

High-grade copper cathodes (99.99%) are melted in a shaft furnace under controlled atmospheres to minimize oxygen pickup.

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2. Continuous Casting

Molten copper is cast into a continuous bar. This rapid solidification ensures a fine, uniform grain structure.

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3. Hot Rolling & Cleaning

The bar is immediately rolled into rod form (8mm-30mm) and pickled to remove surface oxides, resulting in a bright finish.

Industrial Applications

From power grids to precision electronics, our copper rods serve as the foundational raw material for critical industries.

Copper Rod for Power Cables

Power Transmission

Primary raw material for LV/MV/HV power cables and overhead conductors due to high conductivity.

Enamelled Copper Wire for Motors

Magnet Wire

Ideal for transformers and motors. High ductility allows drawing down to ultra-fine diameters.

Automotive Wiring Harness

Automotive Harness

Meeting stringent requirements for signal transmission reliability and vibration resistance.

Copper Busbars and Switchgear

Busbars & Switchgear

Used in panels where low electrical resistance and high thermal conductivity are vital.

Frequently Asked Questions

Common questions about our Copper Rod procurement, packaging, and standards.

What is the difference between ETP and OFC Copper Rod?
The main difference is the oxygen content. ETP (C11000) contains 0.02-0.04% oxygen, making it ideal for general electrical use. OFC (C10100/10200) is oxygen-free (< 0.001%), offering superior ductility and immunity to hydrogen embrittlement, suitable for high-end electronics and vacuum applications.
How are the copper rods packaged for shipping?
Our standard packaging is continuous coils weighing between 2 to 4 tons per coil, secured on wooden pallets with moisture-proof wrapping. For custom cut lengths (straight bars), we use wooden boxes to prevent bending during transit.
Do your copper rods meet ASTM B49 standards?
Yes. All our Electrolytic Tough Pitch (ETP) and Oxygen-Free (OFC) copper rods are manufactured in strict accordance with ASTM B49 and EN 1977 standards. We provide MTC (Mill Test Certificates) with every shipment proving chemical composition and conductivity.
What is the Minimum Order Quantity (MOQ)?
Due to the nature of continuous casting production, our typical MOQ is 1 Metric Ton for standard sizes (8mm). For custom diameters or special alloys, please contact our sales team for specific requirements.