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When your project demands a reliable, electrically conductive, and thermally stable flat copper piece, generic sheet offcuts simply don't cut it. Makers, jewelers, electricians, and fabricators who need a clean, ready-to-use copper disc — without the waste of cutting from full sheet stock — will find these solid 99% pure copper blanks discs the practical answer to a recurring sourcing headache.
Each disc is cut from solid copper rod or sheet stock with a purity of 99% (C11000-equivalent electrolytic tough pitch copper). Thickness ranges from 0.3 mm to 1.5 mm (approx. 0.012" to 0.059"), and outer diameters span 10 mm to 300 mm (approx. 0.39" to 11.81"). The round profile features a smooth, flat face with consistent thickness across the disc body. Edges are typically sheared or turned, with minor burr that can be dressed with light filing.
Typical use cases include copper gasket blanking for plumbing and HVAC fittings, stamping and forming blanks for handmade jewelry and coin-style pendants, electrical bus bar shims and grounding pads in control panel builds, and heat-spreader inserts in DIY electronics cooling assemblies. The wide size matrix makes these copper round plate metal discs a versatile stock item for any well-equipped workshop.
| Material | 99% Pure Copper (Electrolytic Tough Pitch, C11000-equivalent) |
|---|---|
| Shape | Round / Disc |
| Thickness Range | 0.3 mm – 1.5 mm (approx. 0.012" – 0.059") |
| Diameter Range | 10 mm – 300 mm (approx. 0.39" – 11.81") |
| Thickness x Diameter | See variant options |
| Pack Quantity | 1 Pcs / 2 Pcs / 4 Pcs (see variant options) |
| Surface Finish | Mill finish / bright copper; minor edge burr may be present |
| Hardness | Soft / annealed-equivalent (typically H00–H01) |
| Electrical Conductivity | ~100% IACS |
| System of Measurement | Metric (mm) |
| Pre-drilled | No — solid blank, drill to specification |
| Applicable Processes | Stamping, turning, forming, soldering, brazing, filing |
Select the thickness based on the mechanical load or conductivity requirement: 0.3–0.5 mm is suitable for lightweight gaskets, shims, and jewelry blanks; 0.8–1.0 mm works well for heavier gaskets and electrical pads; 1.2–1.5 mm is appropriate for structural shims and heat spreaders. For diameter, measure the bore or recess your disc needs to fit and add any overlap required. All sizes are listed in the variant selector above.
Yes. 99% pure copper (C11000) is a standard material for soft copper gaskets used in plumbing, hydraulic fittings, and HVAC connections. Its softness allows it to cold-flow under bolt load and create a reliable metal-to-metal seal. For high-pressure applications, verify the required crush thickness against your fitting specification before ordering.
Copper naturally forms a protective patina (cuprous oxide / verdigris) when exposed to air and moisture, which slows further corrosion. For most indoor and moderate outdoor applications this is acceptable. In aggressive chemical environments (strong acids, ammonia, or salt spray), consider applying a clear lacquer or sealant, or evaluate whether a copper alloy with higher corrosion resistance is more appropriate.
Yes. 99% pure copper is one of the most solderable and brazeable metals available. It is compatible with standard tin-lead and lead-free solders, silver brazing alloys, and copper-phosphorus brazing rods. Clean the surface with flux before joining to remove the oxide layer and ensure a sound joint.
Yes. These copper blanks can be cut with a hole saw, lathe, milling machine, or bench shear. Use sharp HSS or carbide tooling with a slow feed rate and cutting fluid to prevent work-hardening and built-up edge. For stamping, ensure your die clearance is set for soft copper (typically 4–6% of material thickness per side).
The pack quantity available depends on the size variant selected — smaller discs (10 mm diameter) are available in 4-piece packs, mid-range sizes in 2-piece packs, and larger diameters (typically 60 mm and above) in single-piece options. Select your thickness × diameter combination first, and the available quantity options will appear. Order extras if you are prototyping or expect to make test cuts.
These are precision-cut round blanks, not irregular offcuts. Each disc has a defined diameter and consistent thickness, saving you the time and tooling cost of cutting circles from flat sheet. They are ready to use directly as gaskets, jewelry blanks, or electrical pads without further profiling — though you can machine or form them further as needed.
