T2 Copper Wire Round Solid Bare Uncoated 3mm - 4.5mm Jewelry Making-Wire Craft

For wire-wrapped pendants and frames, 3mm is the most common starting point — it's firm enough to hold a shape but workable with standard jewelry pliers. If you need a heavier structural bail or a bolder aesthetic, 3.5mm or 4mm gives more rigidity. Diameters of 4.5mm and 5mm are better suited to sculptural or structural applications rather than fine jewelry detail work.

The temper of these wires is not individually specified per listing. T2 copper in solid round form at these diameters is typically supplied in a drawn condition that sits between half-hard and hard. If your application requires dead-soft wire, you can anneal the wire by heating it to a dull red and quenching or air-cooling it. Contact us to confirm temper if this is critical for your project.

Copper does not rust (rust is iron oxide), but it does oxidize. Exposed to air and humidity, bare copper will gradually develop a darkened patina — first brown, then potentially green verdigris over longer periods. For jewelry, many makers intentionally accelerate this patina for an antique look. To preserve a bright finish, seal the finished piece with a clear lacquer or wax after forming.

T2 bare copper wire is commonly used for low-voltage grounding, bonding straps, and earthing applications in DIY electrical work. However, always verify that the wire gauge meets the current-carrying requirements of your specific application and complies with local electrical codes. This wire is not pre-rated for any specific electrical standard — confirm suitability with a qualified electrician for safety-critical installations.

Yes. Solid copper wire in the 3mm–5mm range is widely used for bonsai branch training because it holds its shape after bending and can be removed cleanly without damaging bark when applied correctly. It is also used for garden trellis supports and plant ties. Note that outdoor exposure will accelerate oxidation, which is generally harmless for horticultural use.

Measure your project's total wire consumption before ordering. For jewelry making, a 1m or 2m length is often sufficient for individual pieces. For larger craft projects, sculpture armatures, or electrical runs, the 5m–20m options offer better value per metre. Each length is a single continuous cut piece — not joined sections.

Yes. Bare copper solders readily with standard rosin-core or silver solder and appropriate flux. Because there is no coating to burn off, you get a clean joint with minimal preparation. Use a flux appropriate for copper and ensure the wire surface is clean and free of heavy oxidation before soldering for the best bond.