If your high-voltage electrodes are pitting prematurely or your vacuum chamber is failing its base-pressure test, the culprit is often a mismatched material choice between Tungsten Copper (WCu) and C10100 (OFE). While WCu is the king of arc resistance, C10100 Oxygen-Free Electronic copper is the only material that can provide the thermal and electrical throughput required for high-efficiency power systems.
For a procurement manager, the "Hardness vs. Conductivity" trade-off isn't just a technical detail-it's the difference between a system that lasts for years and one that fails in weeks.
The Conductivity Gap: 101% IACS vs. 35% IACS
Tungsten Copper is a "pseudo-alloy" that combines the high melting point of tungsten with the conductivity of copper. However, because tungsten is a poor conductor, the resulting alloy suffers a massive "conductivity tax."
Tungsten Copper (WCu70): Conductivity typically drops to 35% - 45% IACS.
C10100 (OFE): Guaranteed at 101% IACS.
Using C10100 Round, Square & Flat Bar instead of WCu reduces resistive heating (P = I-squared * R) by more than 60%. If your application is a high-current busway or a vacuum feedthrough that doesn't face direct arcing, the superior efficiency of 99.99% pure C10100 will drastically lower your system's operating temperature.
Engineering Spec Breakdown: C10100 vs. WCu70
| Feature | C10100 (OFE Grade 1) | Tungsten Copper (W80Cu20) | Procurement Impact |
| Copper Purity | 99.99% Min | ~20% Copper / 80% W | C10100 is "Electronic Grade" |
| Conductivity | 101% IACS | 30% - 35% IACS | C10100 is 3x more efficient |
| Melting Point | 1083 Celsius | Over 2500 Celsius | WCu survives direct arcing |
| Oxygen Content | < 5 ppm | Uncontrolled | C10100 is better for UHV |
| Hardness (HB) | ~45 - 90 | Over 200 | WCu resists spark erosion |
Consult GNEE Engineers: Should You Use C10100 or WCu for Your Electrode?
Vacuum Integrity: Why C10100 Wins in UHV Environments
In the production of Custom CNC Machined Parts for aerospace or semiconductor tools, Tungsten Copper presents a major risk: outgassing. WCu is often produced by "infiltration," which can leave microscopic pores or residues that trap gas.
Our 99.99% pure C10100 is vacuum-induction melted and contains less than 5 ppm oxygen. It is the only material that can provide the vacuum stability required for high-energy physics. If your assembly requires brazing, refer to our guide on C10100 welding and brazing best practices; you'll find that C10100's purity ensures a hermetic seal that sintered WCu simply cannot match.
Decision Matrix: When to Specify C10100 over WCu
High-Current Busbars: Use C10100. The energy savings from 101% IACS far outweigh any mechanical benefit.
EDM Electrodes: Use WCu. The high melting point of tungsten is needed to resist the spark erosion.
Vacuum Feedthroughs: Use C10100. The low outgassing rate is essential for UHV integrity.
Heat Sinks: If the heat flux is massive, use C10100. For more data on thermal performance, see our C10100 mechanical and physical properties.
If your part isn't facing a direct electrical arc, paying the massive premium for Tungsten Copper is a waste of your procurement budget. C10100 Oxygen-Free Electronic copper provides the high-efficiency electrical path that high-tech systems demand. GNEE METAL provides certified Grade 1 material, ensuring your power and vacuum systems operate at peak efficiency with zero contamination.
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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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