For most structural fasteners and low-load terminals, C36000 (Free-Cutting Brass) is the default because it is cheap and machines like butter. However, in an 800V EV battery pack or an AI server rack, brass is a massive bottleneck. Brass only provides about 28% IACS conductivity. When you switch a power-carrying component to C10100 Oxygen-Free Electronic (OFE) copper, you get 101% IACS conductivity. This shift directly solves the "Hotspot" issues that lead to hardware failure.
Why is C10100 4 times more efficient than Brass?
The technical reason is purity. Brass is an alloy of copper and zinc; the zinc atoms act as roadblocks for electrons and phonons. C10100 Oxygen-Free Electronic copper is 99.99% pure, allowing current and heat to flow with minimal resistance.
If you push high current through a brass connector, you are effectively building a space heater. This leads to massive I-squared R losses. Furthermore, as we analyzed in How to weld and braze C10100, high purity makes copper weldable. Brass, however, contains zinc that boils off and creates toxic fumes and porous, weak welds.
Material Performance – C10100 (OFE) vs. Brass
| Property | C10100 (OFE) Copper | C36000 Free-Cutting Brass | Engineering Result |
| Conductivity | 101% IACS | 26 - 28% IACS | Copper is 4x more efficient |
| Thermal Cond. | 391 W/(m·K) | 115 W/(m·K) | Copper cools 3.4x faster |
| Machinability | 20% (Gummy) | 100% (Baseline) | Brass is easier to cut |
| Melting Point | 1083°C | 885°C - 900°C | Copper survives high fault loads |
Is the price gap between Copper and Brass worth it?
While C10100 has a higher upfront cost per pound, the ROI comes from size reduction and reliability. Because C10100 Round, Square & Flat Bar is so much more conductive, you can use a much thinner bar to replace a bulky brass part. This saves space in compact EV battery designs.
In many Custom CNC Machined C10100 Parts, the switch to copper is forced when operating temperatures exceed 70°C. If your hardware is throttling due to heat, you are likely a victim of the design trap of using "cheaper" alloys that waste energy. For heavy-duty industrial electrodes or liquid cooling interfaces, C10100 Plate and Sheet is the only way to maintain the Max 5ppm oxygen limit required for vacuum-tight performance.
FAQ
1. Can I swap Brass for C10100 without redesigning the part?
Electrically, yes. Your part will run much cooler. However, you must adjust your CNC speeds. C10100 is "gummy" and doesn't chip like brass, so it requires high-rake tools to prevent the "smearing" that can ruin surface Ra values.
2. Is C10100 as corrosion-resistant as Brass?
Brass is often used in marine settings for its corrosion resistance. However, C10100 is 99.99% pure and highly stable. For high-purity electronics, copper is preferred because it doesn't suffer from "dezincification"-a process where zinc leaches out of brass and weakens the part.
3. Does Brass have a lower melting point than C10100?
Yes. Brass melts around 900°C, while C10100 melts at 1083°C. In high-power applications where short circuits are a risk, copper provides a much larger safety margin before the conductor vaporizes.
4. Why is C10100 better for high-frequency (RF) applications?
Brass has too much internal resistance for signal purity. C10100, with its Max 5ppm oxygen limit, provides the clean, oxide-free surface required for the "Skin Effect" in high-frequency waveguides and 5G antennas.
5. Is it easier to plate Silver on Copper or Brass?
Copper is easier. Because C10100 is oxygen-free, plating adhesion is superior. Silver plating on brass can sometimes experience "bleed-through" where zinc atoms migrate to the surface, but with C10100, the silver layer remains stable.
6. Does switching to C10100 save assembly weight?
Often, yes. Since copper is 4x more conductive than brass, you can use a C10100 bar that is 60% smaller in cross-section to carry the same current. This leads to a lighter overall assembly despite copper being denser than brass.
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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