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When your project demands consistent conductivity and reliable corrosion resistance, standard sheet metal simply won't do. Electricians, hobbyists, metalworkers, and roofing contractors who need a dependable copper sheet stock will find this Cu-ETP grade plate delivers the purity and workability required for demanding applications.
This listing includes 2 pieces of 99.9% pure electrolytic tough pitch copper (Cu-ETP) sheet plate, each measuring 0.5 mm thick × 460 mm wide × 520 mm long (approximately 0.020 in × 18.1 in × 20.5 in). The sheets are flat-rolled to consistent thickness tolerance and feature a smooth mill finish surface ready for cutting, forming, or soldering.
Typical use cases include DIY electrical bus bars and grounding straps, custom copper roofing flashing and decorative cladding, jewelry making and metalsmithing blanks, RF shielding panels for electronics enclosures, and heat-sink fabrication for small thermal management projects.
| Material | 99.9% Pure Copper (Cu-ETP, Electrolytic Tough Pitch) |
|---|---|
| Thickness | 0.5 mm (0.020 in) |
| Width | 460 mm (18.1 in) |
| Length | 520 mm (20.5 in) |
| Quantity per Pack | 2 pieces |
| Surface Finish | Mill finish (smooth, flat-rolled) |
| Temper | Soft annealed (O temper) |
| Electrical Conductivity | ≥100% IACS |
| Thermal Conductivity | ~385 W/(m·K) |
| Density | ~8.96 g/cm³ |
| Melting Point | ~1,083 °C (1,981 °F) |
| Weight (per sheet) | See variant options |
| Applicable Standards | See variant options |
This listing is for 0.5 mm (20 gauge equivalent) copper sheet, which is well-suited for light fabrication, RF shielding, decorative cladding, and craft work. For structural roofing flashing or heavy bus bars requiring more rigidity, consider thicker gauges (1.0 mm or above). If you need a different thickness, check our other size variants.
At 0.5 mm, Cu-ETP copper sheet is flexible and easy to form but will hold a bent shape once set. It is not intended for load-bearing structural applications. For panels that must resist deformation under pressure, reinforcing with a backing frame or choosing a thicker gauge is recommended.
Yes. Copper naturally forms a protective patina (verdigris) when exposed to moisture and air, which actually slows further corrosion. This makes Cu-ETP sheet a reliable choice for outdoor flashing, gutters, decorative facades, and garden art. If you prefer to maintain the bright copper appearance, apply a clear lacquer or wax coating after installation.
Yes. The mill-finish surface of Cu-ETP copper accepts standard tin-lead and lead-free solders as well as silver brazing alloys without requiring special pre-treatment. Light cleaning with flux is sufficient for most electrical and plumbing joint applications.
Absolutely. At 0.5 mm thickness, these sheets cut cleanly with aviation snips, bench shears, a utility knife scored multiple times, or a laser cutter. CNC routing and waterjet cutting are also compatible. Deburr edges after cutting with a file or fine sandpaper for safe handling.
The 2-piece pack gives you a backup sheet in case of a cutting error, allows you to complete larger projects that require more than one panel, and reduces the cost per sheet compared to buying individually. It is especially practical for RF shielding enclosures, roofing flashing runs, and craft projects where material waste is common.
Cu-ETP (Electrolytic Tough Pitch) is the most widely used commercial copper grade, containing ≥99.9% copper with a small amount of oxygen (~0.02–0.04%). It offers excellent electrical conductivity (≥100% IACS) and good formability. It differs from oxygen-free copper (Cu-OF/C10100) in that it is not recommended for hydrogen-atmosphere brazing, but for the vast majority of electrical, roofing, and craft applications, Cu-ETP is the standard and cost-effective choice.
