When an engineering project requires high-performance fluid cooling or electrical transmission, the geometry of the conductor is just as important as its purity. While a standard round C10100 seamless copper tube is the go-to for vacuum lines, many high-power induction and busbar systems require specialized C10100 square copper tubes or rectangular profiles to maximize surface contact and structural rigidity.
At GNEE METAL, we provide C10100 Oxygen-Free Electronic copper in a variety of hollow formats, all certified to hit the 101% IACS conductivity threshold required for electronic-grade applications.
Why is a C10100 seamless copper tube mandatory for high-vacuum cooling?
In Ultra-High Vacuum (UHV) environments, even the smallest weld seam is a potential leak point. This is why a C10100 seamless copper tube is preferred over welded alternatives. Because the material is 99.99% pure and oxygen-free, it can be bent and flared without the risk of grain-boundary cracking.
Whether you are sourcing a small-diameter C10100 conductive copper pipe for a laboratory cryostat or a heavy-walled C10100 OFE copper pipe for an industrial particle accelerator, the lack of oxygen ensures that your vacuum integrity remains compromised-free during high-temperature bake-outs.
C10100 Copper Tube Formats and Their Primary Uses
| Tube Profile | Common Search Term | Key Industry Application |
| Round Seamless | C10100 seamless copper tube | Cryogenic cooling, UHV lines, MRI magnets |
| Square Hollow | C10100 square copper tube | Induction heating coils, High-current busbars |
| Rectangular | C10100 rectangular copper tubing | Power electronics, Liquid-cooled heat sinks |
| Heavy Wall | C10100 conductive copper pipe | High-voltage switchgear, Grounding systems |
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Where do engineers use C10100 square copper tubes and rectangular profiles?
In induction heating and high-power transformer design, C10100 square copper tubes are the gold standard. The flat surfaces of a square or rectangular profile allow for much easier mounting of power electronics and provide a more efficient path for liquid cooling compared to round tubes.
Furthermore, C10100 rectangular copper tubing is often used in the manufacturing of high-efficiency busbars. Because it is hollow, it provides a high surface-area-to-weight ratio, which is excellent for managing the skin effect in AC applications. If your project involves complex geometries, our Custom CNC Machined Parts service can take these square or round tubes and turn them into finished cooling manifolds or connectors.
How to ensure your C10100 conductive copper pipe meets ASTM B170 Grade 1?
When procurement managers source a C10100 conductive copper pipe, the biggest risk is receiving "deoxidized" copper (like C12200) instead of true OFE copper. As we compared in our article on C10100 vs. C12200 differences, the presence of phosphorus in standard pipes will drop your conductivity from 101% IACS to below 85% IACS.
Technical Specifications for GNEE C10100 Tubing
| Specification | Target Value | Verification Method |
| Oxygen Content | < 5 ppm | Hydrogen Embrittlement Test per ASTM B170 |
| Electrical Cond. | 101% IACS | Eddy Current or 4-Point Probe Testing |
| Purity (Cu) | 99.99% Min | ICP-OES Chemical Analysis |
| Surface Finish | Smooth / Bright | Visual inspection for oxide-free interior |
Every C10100 Seamless Tube & Pipe we ship is accompanied by an MTR that confirms these values. If you are unsure how to read these reports, please refer to our guide on verifying a C10100 MTR.
Strategic Sourcing of C10100 Hollow Conductors
Whether you need a C10100 square copper tube for an induction coil or a high-purity C10100 seamless copper tube for a medical MRI system, GNEE METAL provides the dimensional precision and metallurgical purity your project demands. By choosing the right geometry-be it round, square, or rectangular-you optimize both the electrical efficiency and the cooling performance of your system.
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GNEE METAL Product Range
| Product Type | Shapes Available | Common Grades | Diameter/Thickness Range | Length/Width Range | Applications |
|---|---|---|---|---|---|
| Copper Tubes | Round, Square, Rectangular, Coiled | C10100, C10200, C11000, C12200, C12000 | OD: 0.5mm - 300mm Wall: 0.1mm - 20mm | Up to 6000mm or custom | HVAC, Plumbing, Heat Exchangers, Refrigeration, Hydraulic Lines |
| Copper Plates & Sheets | Flat Sheets, Perforated, Embossed, Tread Plate | C10100, C11000, C12200, C23000, C26000 | Thickness: 0.1mm - 200mm | Width: Up to 2500mm Length: Up to 6000mm | Electrical Busbars, Roofing, Cladding, Gaskets, Transformers |
| Copper Bars & Rods | Round Bar, Square Bar, Hexagonal Bar, Flat Bar | C10100, C11000, C14500, C17200, C18200 | Diameter: 1mm - 300mm | Length: 1000mm - 4000mm | Machined Components, Electrical Contacts, Busbars, Fasteners |
| Copper Wires | Round Wire, Flat Wire, Square Wire, Stranded, Braided | C11000, C11600, C17200, C17510 | Diameter: 0.05mm - 12mm | Coil weights: 1kg - 500kg | Electrical Wiring, Cables, Springs, Mesh, Welding Wire |
| Copper Strips & Coils | Thin Strip, Foil, Slit Coil, Profile Strip | C11000, C12200, C19400, C26000, C26800 | Thickness: 0.03mm - 5mm | Width: 2mm - 1000mm Coil ID: 300mm - 600mm | Transformers, Radiators, Shielding, Terminals, Connectors |
About Our Factory
We operate a full range of production lines including extrusion presses, cold drawing benches, high-speed rolling mills, slitting lines, and precision CNC machining centers, enabling us to produce copper tubes, plates, bars, wires, and strips entirely in-house. For quality assurance, we maintain a dedicated inspection laboratory equipped with spectral analyzers, universal testing machines, hardness testers, surface roughness testers, and optical measuring instruments. Every batch is tested for chemical composition, mechanical properties, and dimensional accuracy before shipment. Our production capacity reaches 500+ tons per month, and we hold ISO 9001:2015 certification with full traceability from raw material to finished product. Whether you need standard mill stock or custom-processed components, we deliver precision copper products with short lead times and complete material certification.
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