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When your project demands a material that conducts reliably, cuts cleanly, and holds its shape under pressure, generic sheet offcuts simply won't do. Makers, jewelers, electronics hobbyists, and small-batch fabricators who need repeatable, dimensionally consistent copper discs will find these solid pure copper disc blanks ready to work straight out of the package — no deburring marathon required.
Each disc is cut from Cu 99.9 purity copper in a flat, round plate form. Thickness ranges from 0.5 mm to 5 mm (approximately 0.020 in to 0.197 in) and diameter spans 10 mm to 200 mm (approximately 0.39 in to 7.87 in), giving you a wide matrix of sizes to match your exact specification. Surfaces are smooth and free of major inclusions typical of lower-grade copper alloys.
Typical use cases include RF shielding discs for electronics enclosures, heat-spreader blanks for DIY thermal management, stamping and forming stock for jewelry and coin-art projects, and electrode blanks for EDM or electroplating setups. Whether you are sourcing copper disc blanks for jewelry making, copper round plate for heat sink fabrication, or pure copper sheet discs for electrical grounding, these blanks cover the range.
Near-pure copper composition delivers excellent electrical conductivity (typically ≥58 MS/m) and thermal conductivity (≈385 W/m·K), making these discs reliable for both electrical and thermal applications.
Thickness from 0.5 mm to 5 mm and diameter from 10 mm to 200 mm — choose the exact combination you need from the variant selector above.
Discs are cut to a consistent round profile with smooth edges, reducing secondary finishing time for stamping, forming, or direct-use applications.
Annealed-grade copper is soft enough to drill, mill, stamp, and bend without cracking, yet rigid enough to hold dimensional tolerances in light-press operations.
Copper naturally forms a protective oxide layer that slows further corrosion, making these blanks suitable for outdoor, marine-adjacent, and humid-environment projects when properly sealed.
Available in packs of 1, 10, or 50 pieces — scale your order to prototype quantities or small-production runs without overstocking.
| Material | Copper (Cu 99.9% purity) |
|---|---|
| Form | Solid round disc / flat plate blank |
| Thickness Range | 0.5 mm – 5 mm (0.020 in – 0.197 in) |
| Diameter Range | 10 mm – 200 mm (0.39 in – 7.87 in) |
| Electrical Conductivity | Typically ≥58 MS/m (IACS ≈100%) |
| Thermal Conductivity | Approx. 385 W/m·K |
| Surface Finish | Smooth, mill-cut (minor tooling marks may be present) |
| Edge Condition | Clean-cut round edge; light deburring may be needed for precision fits |
| Quantity Options | 1 pc / 10 pcs / 50 pcs (select via Qty variant) |
| Color | Copper / reddish-brown |
| Applications | Jewelry blanks, heat spreaders, RF shielding, electrodes, crafts, grounding discs |
For jewelry stamping and light forming, 0.5 mm – 1 mm discs are easiest to work by hand. For heat spreaders and structural applications, 1.5 mm – 3 mm provides a good balance of rigidity and machinability. For heavy-duty electrodes or thick grounding pads, 3.5 mm – 5 mm is recommended. Select your thickness from the "Thickness X Diameter" variant dropdown above.
Common jewelry blank diameters are 20 mm – 50 mm. For pendant-sized pieces, 25 mm – 40 mm is a popular range. For larger decorative discs or coaster-style pieces, 80 mm – 150 mm works well. All diameters are listed in the variant selector — choose the combination that matches your design template.
Cu 99.9 copper has a tensile strength of approximately 200–250 MPa in the annealed state. These discs are suitable for light structural brackets, spacers, and shims, but are not intended for high-load structural applications. For heavy mechanical loads, consider a copper alloy (e.g., brass or bronze) instead.
Pure copper naturally oxidizes and develops a patina (darkening or greenish verdigris) when exposed to air and moisture over time. This is a normal characteristic of copper. To preserve the bright finish, apply a clear lacquer or wax coating after cleaning. For outdoor or marine-adjacent use, a protective sealant is recommended.
Yes. Cu 99.9 copper is highly solderable and brazeable. Use a rosin-core or water-soluble flux appropriate for copper, and standard lead-free or leaded solder. For brazing, silver-based brazing alloys work well. Clean the surface with isopropyl alcohol or a mild acid flux before joining for best results.
Yes. These discs machine well with standard carbide end mills using copper-rated cutting fluid. For laser engraving, a fiber laser is recommended as CO₂ lasers have low absorption on bare copper. Thinner discs (0.5 mm – 1 mm) are also suitable for waterjet or fine-blade cutting.
The "Qty" variant lets you choose your pack size. Ordering 10 or 50 pieces of the same size combination offers a lower per-unit cost compared to single-piece orders, making bulk quantities ideal for production runs, classroom projects, or stocking a workshop. All pieces in a pack are the same thickness and diameter as selected.
