C10100 OFE Copper Round Square Flat Bars

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of c10100 ofe copper round square flat bars in China, also supports customized service. Welcome to buy discount c10100 ofe copper round square flat bars for sale here from our factory. Quality products and reasonable price are available.

C10100, commonly known as Oxygen-Free Electronic (OFE) Copper, is the highest-purity grade of copper available. At GNEE METAL, we supply C10100 in three primary solid profiles-Round, Square, and Flat bars-refined to meet a minimum copper purity of 99.99% with an oxygen content strictly controlled to below 5 ppm (0.0005%).

This grade is not just "high purity"; it is specifically engineered for environments where standard ETP copper fails-primarily in Ultra-High Vacuum (UHV) systems, semiconductor manufacturing, and high-power electronics.

Get a Fast Quote on C10100 Bars

We maintain a deep inventory of C10100 (UNS C10100 / ASTM B187) to support both prototype machining and high-volume production.

C10100 Round Bars (Rods)

C10100 Square Bars

C10100 Flat Bars

1. C10100 Round Bars (Rods)

Precision-drawn for high-speed CNC machining. Our round rods feature excellent straightness and tight diameter tolerances, making them ideal for Swiss-turning applications.

Diameters: 3mm to 350mm (Custom sizes available upon request).

Typical Uses: Vacuum feedthroughs, pins, connectors, and particle accelerator components.

2. C10100 Square Bars

Supplied with clean, sharp corners or slightly radiused edges depending on your design requirements.

Dimensions: From 5mm x 5mm up to 200mm x 200mm.

Typical Uses: Cryogenic heat sinks, RF microwave housings, and structural supports in vacuum chambers.

3. C10100 Flat Bars (Rectangular/Busbars)

Engineered for maximum surface-to-surface contact. These are preferred for high-current applications where heat dissipation and electrical efficiency are critical.

Thickness: 2mm to 100mm | Width: Up to 400mm.

Typical Uses: High-power busbars, switchgear, and PCB backing plates.

If your project requires custom lengths or non-standard cross-sections, please [request a customized quotation via email]  with your specific drawings.

Zero Outgassing for UHV Environments

In ultra-high vacuum applications, the presence of oxygen or impurities leads to "outgassing," which can contaminate sensitive equipment. GNEE C10100 bars are smelted in a vacuum-controlled environment to ensure they are virtually free of volatile elements.

Certified Resistance to Hydrogen Embrittlement

When standard copper is heated in a hydrogen-rich atmosphere (during brazing or welding), internal oxides react to form water vapor, causing the metal to crack. Our C10100 bars pass the ASTM F68 hydrogen embrittlement test, making them safe for high-temperature glass-to-metal sealing and brazing.

101% IACS Electrical Conductivity

By eliminating trace impurities, C10100 achieves a minimum conductivity of 101% IACS. This ensures minimal energy loss and lower heat generation in high-frequency signal and high-current power transmission.

We don't just ship full-length bars. We help you reduce machining time by providing near-net-shape blanks:

Precision Sawing: Tolerances as tight as ±0.5mm.

Custom Milling: Square and flat bars can be milled to specific thicknesses or widths.

Surface Finishing: We offer polished or "bright-annealed" finishes to ensure the surface is free of scratches or oxidation before it reaches your CNC machine.

Beyond bars and rods, GNEE METAL provides a complete ecosystem of ASTM B170 Grade 1 copper.

Every shipment of GNEE C10100 bars is backed by a Mill Test Report (MTR) confirming the chemical analysis and conductivity.

Our Overseas Packaging Protocol:

Cleaning: Bars are degreased and cleaned to remove all processing fluids.

Oxidation Barrier: Wrapped in VCI (Volatile Corrosion Inhibitor) film to prevent "turning green" or spotting during sea freight.

Mechanical Protection: Secured in heavy-duty, reinforced wooden crates to prevent bending or edge damage during transit.

To ensure your production schedule stays on track, please [email us today for current stock levels] and estimated lead times to your port.

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