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When your project demands a reliable, consistent copper disc that won't warp, corrode, or disappoint, sourcing the right blank is half the battle. Whether you're a jeweler stamping custom pendants, a maker etching circuit art, or a fabricator cutting gaskets for industrial assemblies, inconsistent thickness and impure alloys waste time and ruin results. These solid 99% pure copper round blanks are designed for makers and small workshops who need dependable raw material in hand, ready to cut, form, or finish.
Each disc is cut from solid 99% pure copper plate stock. Thickness ranges from 1.6mm to 6mm (approximately 0.063" to 0.236"), and diameters span 10mm to 300mm (approximately 0.39" to 11.81"). The round profile is consistent edge-to-edge, making these blanks suitable for both hand-tool and machine operations. Available in individual pieces or small multi-packs for smaller sizes.
Typical use cases include copper jewelry blanks for stamping and enameling, heat spreader discs for electronics and thermal management, decorative medallions and plaques for home or garden, and custom gaskets or washers for plumbing and mechanical DIY projects. Long-tail applications include copper disc for repoussé metalwork, pure copper round plate for grounding electrodes, and thick copper blank for blacksmithing and forging practice.
| Material | 99% Pure Copper (C11000 equivalent) |
|---|---|
| Shape | Round / Disc |
| Thickness Range | 1.6mm – 6mm (0.063" – 0.236") |
| Diameter Range | 10mm – 300mm (0.39" – 11.81") |
| Surface Finish | See variant options |
| Tolerance | See variant options |
| Available Quantities | 1 Pcs / 2 Pcs / 4 Pcs (varies by size) |
| Conductivity | Approx. 100% IACS (typical for 99%+ pure copper) |
| Melting Point | 1,085°C (1,985°F) |
| Density | 8.96 g/cm³ |
| Applications | Jewelry, electronics, gaskets, decorative metalwork, DIY fabrication |
Select the Thickness x Diameter option that matches your finished part dimensions, accounting for any material you'll remove during cutting, filing, or machining. For jewelry stamping, 1.6–2mm is typically sufficient. For structural or thermal applications, 3–6mm provides more rigidity and mass. Use the diameter closest to your target size and trim down as needed.
99% pure copper (C11000) has a tensile strength of approximately 220–250 MPa in the annealed state. It is well-suited for gaskets, washers, and light structural brackets, but is not recommended for high-stress load-bearing applications where copper alloys (brass, bronze) or steel would be more appropriate. For decorative, electrical, and thermal uses, pure copper performs excellently.
Copper does not rust. Over time it develops a natural oxide patina (darkening to brown, then eventually green verdigris in outdoor or humid environments). This patina is stable and actually protects the underlying metal. If you prefer a bright finish, apply a clear lacquer or metal sealant after polishing. For indoor decorative use, the natural aging process is often desirable.
Yes. 99% pure copper is one of the most solderable and brazeable metals available. It bonds readily with standard lead-free solder, silver solder, and brazing alloys. Ensure the surface is clean and oxide-free before joining — a light sanding or flux application is recommended for best results.
These blanks are compatible with CNC milling, turning, and drilling. Copper's high thermal conductivity can make laser cutting more challenging than with steel or aluminum — a fiber laser with sufficient power is recommended if laser cutting is your intended method. For CNC machining, use sharp carbide tooling and adequate coolant to manage heat buildup.
Smaller diameter sizes (typically 10mm) are available in 2-pack or 4-pack options, while larger sizes are sold individually. If you're prototyping or testing a design, ordering a single piece first is a cost-effective approach. For production runs or projects requiring multiple identical parts, ordering multi-packs where available reduces per-unit cost.
For light surface oxidation, wipe with a cloth dampened with a mild acid solution (such as diluted white vinegar or lemon juice) then rinse and dry immediately. For a mirror finish, use progressively finer sandpaper (up to 2000 grit) followed by a metal polishing compound. Always wear gloves to avoid leaving fingerprints, which can accelerate localized tarnishing.
