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When your project demands reliable electrical conductivity, thermal performance, and a material that machines cleanly, finding the right copper stock in the exact size you need can be a real challenge. These solid pure copper disc blanks are cut to precise diameters and thicknesses, giving hobbyists, jewelers, electricians, and small-shop fabricators a ready-to-use starting point without the waste of cutting from sheet.
Each disc is made from solid pure copper (C11000 / ETP grade equivalent), featuring a bright, uncoated surface finish. Diameter options range from 10 mm (approx. 0.39 in) to 150 mm (approx. 5.91 in), and thickness options span 0.5 mm (approx. 0.020 in) to 6 mm (approx. 0.236 in), covering a wide range of project requirements. Edges are cut and may show minor burring typical of blanked stock; light deburring is recommended before finishing.
Typical applications include copper disc blanks for jewelry stamping and enameling, electrical bus bar and contact pads, heat spreader discs for DIY electronics cooling, decorative metalwork inlays, and custom gasket or shim stock for small-engine and plumbing repairs.
| Material | Solid Pure Copper (C11000 / ETP equivalent) |
|---|---|
| Finish | Mill / bright uncoated |
| Diameter Range | 10 mm – 150 mm (0.39 in – 5.91 in) |
| Thickness Range | 0.5 mm – 6 mm (0.020 in – 0.236 in) |
| Shape | Round disc / blank |
| Edge Condition | Blanked; light deburring recommended |
| Conductivity | ~100% IACS (electrical grade) |
| Quantity per Order | See variant options |
| Weight per Piece | See variant options |
For jewelry stamping and enameling, 0.5 mm–1 mm discs are easiest to form and cut. For electrical contact pads and bus bars, 1.5 mm–3 mm provides a good balance of conductivity and rigidity. For structural shims, gaskets, or heat spreaders requiring mechanical strength, 3 mm–6 mm is recommended. If you are unsure, start with a thinner gauge and test before committing to a larger order.
These discs are made from solid pure copper, equivalent to C11000 (ETP — Electrolytic Tough Pitch) grade. This is the most common commercially pure copper, offering approximately 100% IACS electrical conductivity. It is not a brass or bronze alloy.
Copper does not rust (rust is specific to iron-based metals). Over time, copper naturally oxidizes and develops a patina ranging from brown to green (verdigris), which actually protects the underlying metal. To maintain a bright finish, apply a clear lacquer, wax, or copper-specific sealant after cleaning. For outdoor or high-humidity applications, sealing is recommended.
Yes. Pure copper solders and brazes very well. Use a rosin-core or water-soluble flux appropriate for copper, and standard 60/40 or lead-free solder for electrical work. For brazing, use a copper-phosphorus or silver-based brazing alloy with appropriate flux. Clean the surface thoroughly before joining for best results.
The discs are blanked (die-cut or saw-cut), so edges may have minor burrs or sharpness typical of cut metal stock. Light deburring with a file, sandpaper, or a deburring tool is recommended before handling extensively or using in jewelry applications where skin contact is expected.
For CPU or small electronics heat spreaders, a diameter matching or slightly exceeding your heat source footprint is ideal — commonly 20 mm–50 mm. Thickness of 1 mm–3 mm provides good thermal mass without excessive weight. Pure copper's high thermal conductivity (~385 W/m·K) makes it one of the most effective heat spreader materials available.
The quantity per order depends on the variant you select. Smaller diameter discs are typically available in packs of 2 or 4 pieces, while larger diameter discs are sold individually. Please check the Qty(pcs) option when selecting your variant to confirm the quantity included.
