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When a project demands reliable conductivity, precise dimensions, and a material that holds up under heat and mechanical stress, off-the-shelf sheet metal rarely fits the bill. Hobbyists, engineers, and fabricators working on custom heat spreaders, electrical bus bars, grounding pads, or decorative metalwork need T2 copper discs they can trust to arrive flat, burr-free, and true to size — without ordering a full sheet and cutting it themselves.
These T2 copper discs are cut from solid C11000-equivalent pure copper stock. Each disc is a flat, solid round plate — no holes, no slots — available in diameters from 10 mm (approx. 0.39 in) to 300 mm (approx. 11.81 in) and in six thickness options: 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, and 6 mm. Packing quantities of 1, 2, or 4 pieces are available depending on the selected combination.
T2 copper discs are widely used as heat spreaders in DIY CPU/GPU cooling builds, as electrode blanks in electrochemical setups, as grounding washers in high-current electrical panels, as blanks for coin-style craft and jewelry work, and as thermal interface shims between components in power electronics assemblies.
| Material | T2 Electrolytic Tough Pitch Copper (C11000-equivalent) |
|---|---|
| Form | Solid flat disc / round plate, no holes |
| Diameter Range | 10 mm – 300 mm (0.39 in – 11.81 in) |
| Thickness Options | 2 mm / 2.5 mm / 3 mm / 3.5 mm / 4 mm / 5 mm / 6 mm |
| Packing Quantity | See variant options (1 PCS / 2 PCS / 4 PCS) |
| Surface Finish | Mill finish; slight oxidation toning may be present — normal for bare copper |
| Electrical Conductivity | Typically ≥99.9% IACS |
| Thermal Conductivity | Typically ~385–400 W/m·K |
| Hardness | Typically H60–H80 (annealed to half-hard range; contact us to confirm for specific sizes) |
| Tolerance (Diameter) | See variant options / Contact us to confirm for critical fits |
| Tolerance (Thickness) | See variant options / Contact us to confirm for critical fits |
| Weight (per piece) | See variant options (varies by diameter and thickness) |
Start with your application's dimensional constraints. For heat spreaders, match the disc diameter to the component footprint and choose a thickness of 2–3 mm for lightweight builds or 4–6 mm where additional thermal mass is needed. For electrical contacts or bus bar blanks, select a diameter that covers the terminal area with at least 2–3 mm of margin. If you are machining the disc to a final shape, add 1–2 mm of stock to the diameter for cleanup cuts.
T2 is the Chinese national standard designation for electrolytic tough pitch copper, which is functionally equivalent to C11000 (ASTM) and Cu-ETP (EN). All three refer to copper with a minimum purity of approximately 99.9%, with oxygen content typically in the 0.02–0.04% range. For most electrical, thermal, and fabrication applications, T2 copper performs identically to C11000 or Cu-ETP material.
Bare copper naturally develops a surface oxide layer (patina) when exposed to air and moisture. This does not affect the bulk conductivity or structural integrity of the disc. For applications where surface appearance matters — such as decorative work or exposed electrical contacts — you can clean the surface with a mild acid solution (e.g., diluted citric acid) or apply a clear lacquer or tin plating to slow further oxidation. For thermal interface use inside sealed assemblies, oxidation is generally not a concern.
Yes. T2 copper solders readily with standard tin-lead or lead-free solders using rosin or no-clean flux. Silver brazing is also straightforward with appropriate flux. Fusion welding (TIG/MIG) is possible but requires care due to copper's high thermal conductivity — preheat is often needed for thicker sections (4 mm and above) to achieve proper fusion. For most DIY and light fabrication uses, soldering or brazing is the preferred joining method.
Yes. T2 copper machines well with standard HSS or carbide tooling. Use sharp tools, moderate cutting speeds, and a cutting fluid or lubricant to prevent built-up edge and achieve a clean finish. For drilling, use a center punch to prevent the drill from wandering on the smooth surface. Thinner discs (2–3 mm) may require clamping or backing to prevent flexing during machining.
Packing quantities of 1, 2, or 4 pieces are available depending on the diameter and thickness combination selected. The available quantity options are shown in the variant selector above. If you need quantities larger than what is listed, please contact us — bulk pricing may be available for larger orders.
Use the three selectors above the Add to Cart button: first choose your Diameter (10 mm to 300 mm), then your Thickness (2 mm to 6 mm), and finally your Packing QTY (1, 2, or 4 PCS). The price will update automatically based on your selection. If a combination appears unavailable, that specific size/thickness pairing may not be stocked — contact us to inquire about special orders.
