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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Oxygen-Free Copper Tubes

Oxygen-Free Copper Tubes

-- Steady & Reliable Manufacturer --

The Ultimate Purity for High-Tech Vacuum and Electrical Service

Oxygen-Free (OF) copper tubes, often designated as C10200 or the ultra-pure C10100 (OFE), represent the highest metallurgical grade of copper available in the industrial market. Unlike standard ETP copper, which contains small amounts of oxygen, Oxygen-Free copper is refined in a vacuum or inert atmosphere to reduce the oxygen content to less than 0.001%. This process eliminates the risk of "Hydrogen Embrittlement," a catastrophic failure that occurs when copper containing oxygen is heated in a hydrogen-rich atmosphere (common in welding and brazing). At Zhejiang Jingliang, our OF copper tubes are manufactured for the most demanding technical applications, including vacuum electronics, cryogenic systems, and high-purity gas delivery. By removing the oxygen, we create a material with superior ductility, higher electrical conductivity, and a mirror-bright surface that is essential for maintaining high-vacuum seals.

The value of OF copper lies in its molecular stability. In the semiconductor and aerospace industries, any outgassing or internal impurities can ruin a multi-million dollar process. Our OF tubes are bright-annealed and cleaned to "Vacuum-Grade" standards, ensuring they are free from oils, oxides, and any organic residues. This purity also translates to better performance in electrical applications; OF copper has a higher conductivity than standard copper and is the material of choice for high-end audio equipment, MRI machines, and particle accelerators. We utilize advanced casting and drawing technology to ensure that the grain structure is uniform and the surface is free of any micro-cracks. For engineers working at the edge of physics—whether in deep space or at absolute zero—our Oxygen-Free copper tubes provide the reliable, predictable performance required for success.

OF Copper Technical Parameters

PropertyOxygen-Free (C10200) Spec
Copper Purity (Cu + Ag)99.95% Minimum (C10100 is 99.99%)
Oxygen Content≤ 10 ppm (0.001%)
Electrical Conductivity101% to 102% IACS
Thermal Conductivity391 W/(m·K)
Hydrogen Embrittlement TestPasses ASTM B170 (High Temp)
Outgassing RateExtremely Low (Vacuum Grade)
Standard ComplianceASTM B75, ASTM B170, EN 13606
Surface FinishPolished / Bright Annealed
Hardness (HV)40 to 100 (depending on temper)

Applications in Science and High-End Electronics

Oxygen-Free copper tubes are the primary choice for High-Vacuum Systems and particle accelerators, where they serve as beam tubes and cooling lines. In the electronics sector, they are used to manufacture high-power Vacuum Tubes, magnetrons, and wave guides. The medical industry relies on OF copper for MRI Scanners and other diagnostic equipment that requires high-purity electrical signals. In the aerospace industry, it is used for specialized thermal links and electrical busbars in satellites. High-end audio enthusiasts and cable manufacturers use OF copper for Speaker and Signal Cables due to its lower signal distortion. It is also used in Cryogenic Engineering for transporting liquid nitrogen and helium, as it remains ductile at ultra-low temperatures. Additionally, because it can be safely brazed and welded without losing strength, it is used in the manufacturing of sophisticated heat sinks and power semiconductor housings.

Advantages of Oxygen-Free Metallurgy

The most significant advantage is "Brazing and Welding Security"—because it is oxygen-free, there is zero risk of hydrogen embrittlement, ensuring that every joint is as strong as the base metal. "Superior Conductivity" is another key benefit; it offers the lowest possible electrical resistance, maximizing the efficiency of power systems. In vacuum applications, the "Low Outgassing" property is critical for maintaining high-purity environments. Our OF tubes also offer "Exceptional Ductility," allowing them to be drawn into ultra-fine capillary tubes or bent into complex shapes without splitting. From a surface perspective, the lack of oxides ensures a "Mirror-Bright Finish" that is ideal for plating and high-frequency signal transmission. For long-term reliability, OF copper's purity means it has fewer internal "sites" for corrosion to start, providing better performance in aggressive environments. Finally, it is the standard for "Cryogenic Toughness," maintaining its mechanical properties even at temperatures near absolute zero.

Clean-Room Packaging and Global Shipping

Oxygen-Free copper is highly sensitive to surface contamination. We package our OF tubes in double-layered, vacuum-sealed plastic bags in a clean-room environment. These bags are then placed in reinforced crates with desiccant to prevent any oxidation. Payment is typically T/T or L/C at sight, with pricing reflecting the high purity and specialized processing of the material. We ship globally via air-freight for high-value scientific orders or sea-freight for bulk industrial supply. Every shipment includes a Certificate of Analysis (COA) specifying the exact oxygen content and purity levels. Our logistics team ensures that the tubes are handled with care to prevent any surface scratches that could compromise vacuum seals or electrical performance. We are an approved supplier for major research laboratories and high-tech manufacturers worldwide.

  • Q: Why is Oxygen-Free copper better for welding?
  • A: Standard copper contains cuprous oxide. When welded, the hydrogen in the flame reacts with this oxide to form steam, which creates internal cracks. OF copper has no oxygen, so this reaction cannot happen.
  • Q: What is the difference between C10200 and C10100?
  • A: C10200 is 99.95% pure. C10100 (OFE) is 99.99% pure and is required for the most extreme scientific and semiconductor applications. We produce both.
  • Q: Is OF copper necessary for standard HVAC?
  • A: No, C12200 is sufficient for HVAC. OF copper is only necessary when high-temp brazing in hydrogen, high-vacuum service, or ultra-high electrical conductivity is required.
ABOUT US
30+YEARS OF
EXPERIENCE
About Us

A Reliable Partner of the Copper Tube Industry

Zhejiang Jingliang Copper-Tube Products Co., Ltd is China Oxygen-Free Copper Tubes and Oxygen-Free Copper Tubes Factory, which established in 1994, has been deeply involved in the copper tube industry for over three decades. The company primarily produce various specifications of products such as copper tubes, brass tubes, copper square tubes, fin copper tubes, copper capillary tubes, condenser copper tubes, copper evaporator tubes, and conductive rods, which are of quality and have earned the trust and acclaim of customers both domestically and internationally.

Wide Applications:

These products are widely used in various fields including air conditioning, refrigeration, heat exchange, sanitary ware, automotive, machinery, electric furnaces, and chemical industries.

Convenient Transportation:

Strategically located in Tangpu Town, renowned as the “home of copper tubes” in East China. Our company enjoys a prime location, adjacent to the Shangsan Expressway and National Highway 104, and is conveniently situated just over 70 kilometers from Hangzhou and Ningbo, ensuring easy accessibility and a business position.

Strong Financial Resources:

With its strong financial resources and advanced copper tube processing technology, our company holds an advantageous position in market share, brand value, technological content, and product quality, becoming a preferred supplier for many listed groups.

Large Scale Production:

The company occupies an area of over 20,000 square meters, with a construction area of 12,800 square meters. In 2022, our annual production exceeded 7,500 tons, with a value output of up to 450 million yuan, demonstrating our strong production capacity and market competitiveness.

Comprehensive Industry Chain:

Jingliang has now developed into a complete industrial chain integrating smelting, extrusion, drawing, precision rolling, and annealing. It has been awarded multiple honors, including "Top Ten Copper Tube Enterprises" and "Leading Taxpayer in the Copper Tube Industry".

Smart Manufacturing:

Jingliang Copper-Tube Products will better integrate the concept of factory construction into its corporate development strategy, insist on refining technology and polishing products more finely, and the future of "intelligent manufacturing".

Genuine Cooperation:

Zhejiang Jingliang Copper-Tube Products Co.,Ltd warmly welcomes friends from all walks of life to visit and offer guidance. We look forward to joining hands with you to create a brilliant future together.

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