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When your project demands reliable electrical conductivity, thermal performance, and a material that machines cleanly, finding the right copper disc blank can be frustrating. Thin stock warps, impure alloys corrode, and inconsistent sizing wastes hours of rework. These solid pure copper discs are designed for makers, fabricators, jewelers, and electronics engineers who need a dependable starting point — cut to spec and ready to work.
Each disc is machined from solid pure copper (Cu ≥99.9%), available in thicknesses from 0.5 mm to 5.0 mm (approx. 0.020″–0.197″) and diameters from 10 mm to 300 mm (approx. 0.39″–11.81″). The flat, burr-minimized faces are suitable for direct use or further finishing. Quantity options of 1, 2, or 4 pieces per order let you match your exact project needs.
Typical applications include custom electrical bus bars and grounding pads, heat spreader blanks for thermal management assemblies, jewelry and craft stamping blanks for copper disc pendants, and precision shim stock for mechanical alignment in small workshop builds.
| Material | Solid Pure Copper (Cu ≥99.9%) |
|---|---|
| Thickness Range | 0.5 mm – 5.0 mm (0.020″ – 0.197″) |
| Diameter Range | Ø10 mm – Ø300 mm (0.39″ – 11.81″) |
| Shape | Round disc / blank |
| Surface Finish | Mill finish, flat faces, burr-minimized edges |
| Electrical Conductivity | ~58 MS/m (IACS ~100%) |
| Thermal Conductivity | ~385 W/m·K |
| Hardness | See variant options |
| Quantity per Order | 1 pc / 2 pcs / 4 pcs (select above) |
| Tolerance | See variant options |
For electrical contacts and grounding pads, 0.5–1 mm is typically sufficient. For heat spreaders and structural shims, 1.5–3 mm provides better rigidity. For heavy-duty mechanical spacers or decorative bases, 3–5 mm is recommended. If you are unsure, start with a thinner disc — it is easier to stack or machine down than to add material.
Pure copper (Cu ≥99.9%) has a tensile strength of approximately 200–250 MPa and is relatively soft compared to brass or bronze. It is well-suited for electrical, thermal, and light mechanical applications such as shims and spacers. For load-bearing structural components, a harder copper alloy (e.g., C110 or C101) or a different metal may be more appropriate.
Pure copper naturally oxidizes and develops a patina (darkening or greenish verdigris) when exposed to air and moisture. This patina is a stable oxide layer that actually slows further corrosion. For applications requiring a bright finish, apply a clear lacquer or store discs in a sealed bag. For electrical contacts, light sanding or polishing before use restores conductivity.
Yes. Pure copper solders and brazes readily with standard tin-lead, lead-free, or silver-bearing solders. Use a rosin-based or no-clean flux appropriate for copper. For brazing, copper-phosphorus or silver-copper alloy rods work well. Clean the surface with isopropyl alcohol or light abrasive before joining for best results.
Absolutely. Pure copper disc blanks are a popular choice for jewelry makers, enamelers, and metal artists. The soft temper allows hand-forming, dapping, and stamping without cracking. Thicknesses of 0.5–1.5 mm are most common for pendants and earring blanks, while 2–3 mm discs work well for heavier statement pieces or textured bases.
Match the diameter to your target component size, leaving a small margin for finishing if needed. For example, if your heat spreader footprint is 50 mm, select a 55 mm or 60 mm disc and machine or file to final dimension. For jewelry blanks, the listed diameter is the finished disc size. Refer to the variant selector above for the full range of available diameters from Ø10 mm to Ø300 mm.
For initial prototyping, ordering 1–2 pieces lets you validate fit and function before committing to larger quantities. For small batch production or workshop stock, the 4-piece option offers better value per disc. If you need larger quantities beyond what is listed, contact us to discuss bulk pricing options.
