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When your project demands a reliable, conductive, and workable metal blank, sourcing the right thickness and diameter in one place can be a real challenge. Whether you are a hobbyist jeweler, an electronics maker, or a fabrication professional, these solid pure copper disc blanks give you a ready-to-use starting point without the waste of cutting from sheet stock.
Each disc is cut from solid pure copper (typically 99%+ Cu), offering excellent electrical and thermal conductivity. Thickness ranges from 0.3 mm (~0.012 in) to 6.0 mm (~0.236 in), and outer diameter ranges from 10 mm (~0.39 in) to 150 mm (~5.91 in). Discs are supplied in packs of 1, 2, or 4 pieces depending on the size selected.
These solid copper disc blanks are well suited for DIY electrical contact pads and bus bar fabrication, handmade copper jewelry and pendant blanks, heat spreader shims for electronics cooling, and decorative metalwork stamping and etching projects.
| Material | Solid Pure Copper (Cu) |
|---|---|
| Thickness Range | 0.3 mm – 6.0 mm (approx. 0.012 in – 0.236 in) |
| Diameter Range | 10 mm – 150 mm (approx. 0.39 in – 5.91 in) |
| Shape | Round disc / circular blank |
| Surface Finish | See variant options |
| Pack Quantity | 1 Pcs / 2 Pcs / 4 Pcs (varies by size) |
| Conductivity | Electrically and thermally conductive |
| Workability | Solderable, brazeable, machinable, stampable |
| Corrosion Resistance | Good in dry and indoor environments; patinas over time outdoors |
| Weight per Piece | See variant options |
Thinner discs (0.3–0.5 mm) are ideal for flexible shims, jewelry pendants, and light electrical contacts. Mid-range thicknesses (0.8–2.0 mm) suit heat spreaders, decorative stamping, and general fabrication. Thicker discs (3.0–6.0 mm) are suited for heavy-duty electrical contacts, bus bars, and structural copper components. Select based on the mechanical load and conductivity requirements of your application.
These discs are made from solid pure copper, offering the high electrical and thermal conductivity associated with unalloyed copper. They are not brass or bronze alloys. If your application requires a specific copper grade (e.g., C101 or C110), please contact us to confirm before ordering.
Yes. Pure copper solders and brazes readily using standard copper-compatible fluxes and filler materials. For soldering, use rosin-core or water-soluble flux with tin-silver or tin-copper solder. For brazing, use a copper-phosphorus or silver-based brazing alloy with appropriate flux.
Copper naturally oxidizes and develops a patina (darkening or greenish verdigris) when exposed to air and moisture over time. In dry indoor environments, tarnishing is slow. For applications requiring a bright finish, apply a clear lacquer or wax coating after cleaning. For outdoor use, consider a protective sealant appropriate for copper.
These discs can be machined using standard CNC milling and turning equipment with carbide tooling recommended for copper. Laser cutting pure copper is more challenging due to its high reflectivity; fiber lasers with sufficient power are typically required. For drilling, use sharp HSS or carbide drill bits with cutting fluid to prevent work-hardening.
For prototyping or single-piece projects, the 1 Pcs pack is the most economical choice. If you need spares or are making matching pairs (e.g., two contact pads), the 2 Pcs pack is ideal. The 4 Pcs pack offers the best per-piece value for batch projects or when you need extras for testing and finishing.
Yes. Pure copper's high thermal conductivity makes these discs effective as heat spreader shims between CPU/GPU dies and heatsinks, or between power components and thermal pads. Choose a thickness that matches your gap requirement — typically 0.3–1.0 mm for CPU lapping shims and 1.0–3.0 mm for power electronics applications.
