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When your project demands a metal that stands up to moisture, salt air, and repeated thermal cycling, standard copper or steel sheet often falls short. Makers, hobbyists, marine fabricators, and electrical engineers who need reliable thin-gauge sheet stock will find the copper nickel alloy sheet an ideal solution — combining the workability of copper with the corrosion resistance of nickel.
Each panel is cut from a copper-nickel (cupronickel) alloy, typically a Cu-Ni composition in the 70/30 or 90/10 range, delivering a warm silver-gold tone and excellent ductility. Sizes range from 100 mm × 100 mm (approx. 3.94" × 3.94") up to 300 mm × 300 mm (approx. 11.81" × 11.81"), with thickness options spanning 0.1 mm to 3 mm (approx. 0.004" to 0.118") to suit everything from delicate shielding work to structural brackets.
Typical use cases include DIY heat shields and thermal barriers in workshop builds, RF and EMI shielding panels for electronics enclosures, decorative inlay and metalwork for furniture and art projects, and marine hardware prototyping where saltwater corrosion resistance is critical.
| Material | Copper-Nickel Alloy (Cupronickel) |
|---|---|
| Alloy Composition | See variant options |
| Available Sizes | 100×100 mm, 100×200 mm, 100×300 mm, 200×300 mm, 300×300 mm |
| Thickness Range | 0.1 mm – 3 mm (0.004" – 0.118") |
| Surface Finish | Mill finish (smooth, uncoated) |
| Color / Appearance | Silver-gold metallic tone |
| Tensile Strength | See variant options |
| Hardness | See variant options |
| Electrical Conductivity | Moderate (lower than pure copper) |
| Thermal Conductivity | Moderate — suitable for heat spreading |
| Corrosion Resistance | Excellent — resistant to saltwater and oxidation |
| Machinability | Good — cuttable, bendable, solderable |
| Amount per Order | 1 Pcs or 2 Pcs (see variant options) |
For decorative inlay, shielding foil, or flexible wrapping, choose 0.1–0.3 mm. For structural brackets, heat shields, or rigid panels that need to hold shape, 0.8 mm–3 mm is recommended. Mid-range thicknesses (0.4–0.6 mm) work well for general fabrication and enclosure panels.
Cupronickel has good tensile strength for a copper-based alloy, but it is not intended for structural load-bearing use in the same way as steel. For brackets, mounting plates, or stiffening ribs in light-duty assemblies, thicknesses of 1.5 mm–3 mm are appropriate. For heavy structural loads, consult an engineer.
Cupronickel is highly resistant to corrosion, including saltwater and humid environments. It will develop a natural patina over time (similar to copper), but it does not rust like iron or steel. For marine or outdoor applications, it is one of the most durable copper-based alloys available.
Yes. Cupronickel bonds well with standard copper-compatible solder (60/40 or lead-free) using a rosin or mild acid flux. Silver brazing alloys also work effectively. Clean the surface with fine abrasive or flux before soldering for best results.
Thin gauges (0.1–0.5 mm) can be cut with heavy-duty craft scissors, a utility knife and straightedge, or tin snips. Thicker gauges (0.6–3 mm) are best cut with an angle grinder, jigsaw with a metal blade, or CNC/laser cutter. Always wear gloves and eye protection when cutting metal sheet.
For small electronics enclosures or PCB shielding cans, 100×100 mm or 100×200 mm at 0.1–0.3 mm thickness is typically sufficient. For larger enclosures or rack-mount panels, 200×300 mm or 300×300 mm provides more coverage. Multiple pieces can be overlapped and soldered for seamless shielding.
No. Cupronickel is a copper-nickel alloy — distinct from stainless steel (iron-chromium) and brass (copper-zinc). It offers better corrosion resistance than brass in marine environments and is more workable than stainless steel. Its electrical conductivity is also higher than stainless steel, making it preferred for electrical and shielding applications.
