If your high-current connector is overheating, you probably used C17200. If your spring contact is failing to "snap back," you probably used C10100. In the world of precision engineering, the gap between C10100 and C17200 is a chasm of metallurgical trade-offs.
For a procurement manager, the choice isn't just about the price per kilogram. It's about whether your assembly needs the 99.99% purity of C10100 Oxygen-Free Electronic copper to move electricity, or the massive mechanical strength of Beryllium Copper to maintain tension.
Why do high-power connectors overheat when using Beryllium Copper?
The answer lies in the IACS (International Annealed Copper Standard) rating. C17200 is an alloy containing nearly 2% Beryllium. This makes it incredibly strong, but it also creates a massive "bottleneck" for electrons.
C17200 (Beryllium Copper): Typically offers only 20% to 25% IACS conductivity.
C10100 (OFE): Guaranteed 101% IACS conductivity.
When you use C17200 in a high-current application, the 75% loss in conductivity generates immense heat (I-squared R losses). If your project involves EV battery terminals or C10100 Round, Square & Flat Bar, moving to C10100 ensures your system stays cool. However, as we noted in our recent article on C10100 vs. C18150 thermal strength, C10100 lacks the "memory" needed for spring-loaded contacts.
C10100 vs. C17200
| Engineering Goal | Winner | The Metallurgical Reason |
| Max Electrical Flow | C10100 | 101% IACS vs. 20% IACS |
| Spring Mechanical Tension | C17200 | Tensile strength up to 1400 MPa |
| Vacuum Stability | C10100 | Zero toxic alloys or outgassing |
| Cryogenic Cooling | C10100 | Superior RRR (Residual Resistivity Ratio) |
| Fatigue Resistance | C17200 | Hardness prevents deformation |
Consult GNEE Engineers: Can I Replace C17200 with High-Purity C10100?
The "Toxicity Trap": Why your cleanroom might ban C17200 in favor of C10100
In semiconductor and aerospace environments, C17200 (Beryllium Copper) is often a liability. Beryllium dust and fumes are highly toxic. During high-precision Custom CNC Machined Parts, working with C17200 requires specialized air filtration and safety protocols that drive up the cost of ownership.
By contrast, C10100 is completely non-toxic and vacuum-stable. In UHV (Ultra-High Vacuum) systems, the alloying elements in Beryllium copper can interfere with signal integrity. If you are designing shielding for 5G antennas, our C10100 Foil provides a much cleaner, more conductive alternative to Beryllium-based shielding tapes, as we explored in our guide on C10100 for 5G and signal noise.
Engineering Verdict: When should a procurement manager switch?
Switching from C17200 to C10100 is not a direct "drop-in" replacement.
Specify C10100 if your part is a stationary conductor, a cooling plate, or a high-vacuum chamber component. The ROI comes from zero outgassing and maximum efficiency.
Stick with C17200 only if the part requires constant mechanical flexing (like a battery clip or a spring-loaded probe).
Procurement Decision Flowchart
| If your component needs... | And also needs... | Use this Grade |
| High Conductivity | High Flexing/Springing | C17200 (Beryllium) |
| High Conductivity | Stationary/Rigid Support | C10100 (OFE) |
| High Conductivity | High Temp (up to 500C) | C18150 (CrZrCu) |
| High Conductivity | Ultra-High Vacuum (UHV) | C10100 (Certified) |
A procurement manager's success depends on matching the material's metallurgical profile to the operational environment. C10100 Oxygen-Free Electronic copper is the gold standard for high-current and vacuum-stable components where purity is the primary driver. GNEE METAL provides certified Grade 1 C10100 in various forms, ensuring your precision assemblies operate at the peak of electrical and thermal efficiency.
Request a Quote for C10100 Bars, Foil, or Machined Parts
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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