99.9% Round Copper Wire T2 Solid Bare Uncoated 0.2mm to 3.0mm Diameter By Metre

Standard temper wire is work-hardened during drawing, making it stiffer and better at holding a set shape — useful for structural frames, spring contacts, or any application where the wire must resist deformation. Soft (annealed) temper has been heat-treated to relieve internal stress, so it bends easily without cracking or kinking. Choose soft temper for coiling, wire-wrapping jewelry, bonsai training, or any task that requires repeated bending.

For light-duty grounding or bonding in hobby electronics, 0.8 mm – 1.5 mm (approx. 20–16 AWG equivalent) is a common range. For higher-current applications, select a larger diameter and verify the current-carrying capacity against your local electrical code. If you are unsure, contact us to confirm the appropriate size for your specific load.

Yes. The bare copper surface takes patina treatments well and is compatible with liver of sulfur and other oxidizing agents used in jewelry finishing. For wire-wrapping stones or beads, 0.4 mm – 0.8 mm soft temper is typically the most workable range. For structural frames or clasps, 1.0 mm – 1.5 mm standard temper provides better rigidity.

Bare copper naturally oxidizes when exposed to air and moisture, forming a brownish or greenish patina. This surface oxidation does not significantly affect conductivity in most low-voltage applications, but it can increase contact resistance at connection points over time. For outdoor or high-humidity environments, consider applying a clear lacquer or using tinned copper wire instead. For decorative applications, the patina is often a desired aesthetic outcome.

Yes — the uncoated surface solders readily with standard rosin-core or no-clean flux solder. If the wire has developed surface oxidation from storage, a light abrasion with fine sandpaper or a flux-only pre-tin pass will restore a clean soldering surface. No stripping or chemical removal of coatings is required, unlike enameled magnet wire.

The 1 m option is suited for single repairs, prototypes, or sampling a new diameter before committing to a larger quantity. The 5 m length covers most mid-scale craft or wiring projects. The 10 m option offers a lower per-metre cost and is practical for ongoing production, coil winding, or bulk jewelry making. All lengths are cut from the same continuous wire stock, so quality is identical across options.

The wire is sized in metric millimetres. As a reference: 0.5 mm ≈ 24 AWG, 0.8 mm ≈ 20 AWG, 1.0 mm ≈ 18 AWG, 1.5 mm ≈ 15 AWG, 2.0 mm ≈ 12 AWG, and 2.5 mm ≈ 10 AWG. These are approximate equivalents — always verify the exact diameter against your application's specification rather than relying solely on AWG conversion.