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When your project demands a reliable, conductive, and workable metal blank, finding the right thickness and diameter in one place can be a real challenge. Whether you are a jeweler stamping custom pendants, an electrician fabricating bus bar components, or a maker building heat-transfer fixtures, 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 machined from solid pure copper (C11000 / T2 grade, ≥99.9% Cu), delivering excellent electrical conductivity, thermal transfer, and natural corrosion resistance. Thickness ranges from 0.5 mm to 5 mm (approx. 0.020″ to 0.197″) and diameter from 10 mm to 200 mm (approx. 0.39″ to 7.87″), covering a wide spectrum of project requirements. Edges are cleanly cut and surfaces are smooth, requiring minimal finishing before use.
Typical applications include copper jewelry blanks for hand-stamping and enameling, electrical contact pads and grounding discs for DIY electronics, heat spreader shims for PC cooling builds, and decorative inlay rounds for woodworking and resin casting projects.
Consistent composition ensures reliable electrical conductivity (~58 MS/m) and thermal performance across every disc, batch after batch.
Thickness 0.5–5 mm and diameter 10–200 mm available in a single listing — select the exact combination your project needs without ordering custom cuts.
Discs arrive with burr-free edges and flat, smooth surfaces, reducing prep time before stamping, soldering, or finishing.
Copper's natural ductility makes these discs easy to drill, stamp, bend, and solder — compatible with most standard metalworking tools and techniques.
Pure copper develops a stable oxide layer over time, protecting the base metal in indoor and moderate-humidity environments without additional coating.
Available in packs of 1, 2, or 4 depending on size — order exactly what you need for prototyping or small-batch production runs.
| Material | Pure Copper (C11000 / T2, ≥99.9% Cu) |
|---|---|
| Thickness Range | 0.5 mm – 5 mm (0.020″ – 0.197″) |
| Diameter Range | Ø10 mm – Ø200 mm (0.39″ – 7.87″) |
| Shape | Round disc / blank |
| Surface Finish | Smooth, mill finish (minor oxidation may be present) |
| Edge Condition | Clean-cut, burr-free |
| Electrical Conductivity | ~58 MS/m (IACS ~100%) |
| Thermal Conductivity | ~385 W/(m·K) |
| Hardness | See variant options |
| Pack Quantity | 1 / 2 / 4 pcs (varies by size — see variant options) |
| Color | Copper / Rose-gold tone (natural) |
For jewelry stamping and enameling, 0.5–1 mm discs are the most common choice — thin enough to stamp cleanly but rigid enough to hold shape. For electrical contact pads or grounding applications, 1–2 mm provides a good balance of conductivity and mechanical strength. For structural or heat-spreader uses, 2–5 mm discs offer the mass and rigidity needed for demanding thermal or load-bearing tasks.
Standard pendant blanks typically range from 20–40 mm in diameter. A 25 mm disc is close to a US quarter in size, while a 38 mm disc approximates a US half-dollar. For larger statement pieces or decorative rounds, 50–80 mm diameters work well. Use the diameter selector above to match your design dimensions.
Yes. C11000 / T2 pure copper is the standard material for electrical conductors due to its ~100% IACS conductivity rating. For bus bar or grounding disc applications, select a thickness of 1.5 mm or greater to ensure adequate current-carrying capacity and mechanical durability. Always verify your specific amperage and installation requirements with a qualified electrician.
Pure copper naturally oxidizes when exposed to air and moisture, developing a darkened patina over time. This surface oxidation is stable and does not compromise the structural or electrical integrity of the disc. For applications where appearance matters, you can apply a clear lacquer or wax coating to slow patina development. For a deliberate aged look, chemical patina solutions (liver of sulfur, ammonia fuming) work well on these blanks.
Absolutely. Pure copper is one of the most solderable metals available. Use a rosin-core or water-soluble flux with standard 60/40 or lead-free solder for electronics work. For higher-temperature brazing (e.g., plumbing or HVAC applications), use a copper-phosphorus or silver-bearing brazing alloy with appropriate flux. Clean the surface with fine abrasive or flux before joining for best results.
Pack quantity varies by size — larger and thicker discs are typically sold individually (pack of 1), while smaller and thinner discs come in packs of 2 or 4. The pack quantity for each size combination is shown in the variant selector. If you need a specific quantity for a production run, simply order multiple packs. For prototyping, a single pack is usually sufficient to test fit and finish before committing to larger quantities.
Yes. Pure copper's thermal conductivity of ~385 W/(m·K) makes it an excellent material for CPU delid shims and heat spreader replacements. For this application, a 0.5–1 mm thick disc sized to match your CPU IHS footprint is typical. Pair with a quality liquid metal or high-performance thermal compound for best results. Ensure the disc is flat and free of surface contamination before installation.
