Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your project demands reliable electrical conductivity, consistent thickness, and a clean edge right out of the package, sourcing the right copper disc blank can be frustrating. Hobbyists, makers, electronics technicians, and small-shop fabricators all face the same challenge: finding copper rounds that are truly flat, accurately sized, and ready to cut, stamp, or solder without extra prep work. These T2 solid copper disc blanks are designed for exactly that use case.
Each disc is machined from T2-grade (≥99.9% Cu) electrolytic copper, offering excellent thermal and electrical conductivity. Available in outer diameters from 10 mm (0.39 in) to 200 mm (7.87 in) and thicknesses from 0.5 mm (0.020 in) to 5 mm (0.197 in), the range covers the most common sizes needed for both light-gauge and structural copper work. Listings are sold in packs of 1, 2, or 4 pieces depending on the size selected.
Typical applications include DIY heat spreaders and thermal interface shims for electronics cooling, custom electrical contact pads and bus bar blanks, jewelry and craft metalworking where a pre-cut copper round saves layout time, and decorative inlay or engraving stock for woodworking and leathercraft projects.
| Material | T2 Electrolytic Copper (≥99.9% Cu) |
|---|---|
| Shape | Round disc / circle blank |
| Outer Diameter Range | 10 mm – 200 mm (0.39 in – 7.87 in) |
| Thickness Range | 0.5 mm – 5 mm (0.020 in – 0.197 in) |
| Diameter Tolerance | See variant options |
| Thickness Tolerance | See variant options |
| Surface Finish | Mill finish (bare copper, may show natural oxidation) |
| Electrical Conductivity | ~58 MS/m (IACS 100%) |
| Thermal Conductivity | ~385 W/(m·K) |
| Hardness | Typically soft-annealed to half-hard (40–80 HV) |
| Pack Quantity | 1, 2, or 4 pcs (see variant options) |
| Application | Electrical contacts, heat shims, crafts, stamping, engraving |
Start with the outer diameter your application requires — for heat spreaders, match the diameter to your component footprint; for craft blanks, choose the disc size closest to your finished piece. For thickness, thinner discs (0.5–1 mm) suit stamping, engraving, and flexible shim applications, while thicker discs (2–5 mm) are better for structural contacts, bus bars, or turned parts. If you are unsure, contact us to confirm before ordering.
T2 is a designation for electrolytic tough-pitch copper with a minimum purity of 99.9% Cu. It offers near-maximum electrical and thermal conductivity compared to lower-purity alloys. Unlike brass or bronze, T2 copper contains no significant zinc or tin, making it the preferred choice for electrical contacts, heat sinks, and applications where conductivity is the primary requirement.
T2 copper in the soft-annealed to half-hard condition has a tensile strength of approximately 200–280 MPa. It is suitable for light structural applications such as spacers, shims, and contact pads, but is not recommended for high-load mechanical fastening or impact-prone environments without additional support. For thicker discs (3–5 mm), the material provides more rigidity and is appropriate for machined components.
Copper naturally forms a thin oxide layer (patina) when exposed to air and moisture. In dry indoor environments this process is slow and does not affect conductivity significantly. For applications requiring a bright finish or long-term corrosion resistance, we recommend applying a clear lacquer, anti-tarnish coating, or tin plating after machining. For outdoor or high-humidity use, a protective finish is strongly advised.
Yes. T2 copper is one of the most solderable metals available. Use a rosin-based or no-clean flux with standard tin-lead or lead-free solder for electronics work. For higher-temperature joints, silver brazing alloys with copper-rated flux work well. Clean the surface with isopropyl alcohol or fine abrasive before soldering to remove any oxide layer for the best joint quality.
Thin discs (0.5–1.5 mm) can be cut with aviation snips, a jeweler's saw, or a laser cutter. Thicker discs (2–5 mm) are best machined on a lathe or milled with carbide-tipped tooling. For drilling, use sharp HSS or cobalt drill bits at moderate speed with cutting oil to prevent work-hardening and bit wear. Copper is ductile and tends to grab, so a center punch and pilot hole are recommended before drilling larger diameters.
The quantity options are designed to match common project needs. Order 4 pieces for small diameters (10 mm) where you may need spares for prototyping or craft work. Order 2 pieces for mid-range sizes (20–80 mm) where you want a backup. For large discs (100–200 mm), a single piece is typically sufficient for most projects. Bulk requirements beyond the listed quantities — contact us for a custom quote.
