Overview
Brass round wire is a copper-zinc alloy wire valued for its balanced mechanical and electrical properties. Its golden appearance makes it popular for decorative applications, while its conductivity suits electrical uses. The alloy composition typically ranges from 60–80% copper, with the remainder being zinc and trace elements. Industrial grades like C26000 (70% Cu, 30% Zn) offer optimal formability, while specialty alloys may include lead or tin for machinability. Available in diameters from 0.1mm to 10mm, it comes in soft (annealed), half-hard, and hard tempers to suit bending or structural needs.
Physical and Chemical Properties
Brass wire exhibits a distinctive gold-like color that tarnishes slowly, forming a protective patina. Its density is lower than pure copper, making it lighter for equivalent volumes. The material’s tensile strength ranges from 300–700 MPa depending on temper, with elongation up to 65% in soft states. Chemically, brass resists corrosion from moisture and saltwater better than steel but may dezincify in acidic conditions. It demonstrates moderate thermal conductivity (≈120 W/m·K) and low magnetic permeability. Electrical conductivity is approximately 28% IACS (International Annealed Copper Standard), suitable for non-critical conductive applications.
Main Applications
In electrical industries, brass wire serves as terminals, connectors, and shielding due to its conductivity and solderability. Jewelry makers utilize its malleability for handmade components like clasps and chains. Industrial applications include springs, mesh, and fasteners where corrosion resistance is paramount. Artisans favor brass wire for sculptural works and craft projects, as it’s easy to shape yet holds form. Specialty applications include musical instrument strings (e.g., for lutes) and precision components in clocks. Its antimicrobial properties also make it suitable for healthcare hardware like doorknobs.
Safety and Storage
Brass wire poses minimal health risks under normal handling. However, dust generated during machining may irritate respiratory systems—use local exhaust ventilation. Prolonged skin contact can cause minor discoloration due to copper absorption; gloves are recommended for extended work sessions. Store coils in dry environments to prevent oxidation. Silica gel packs in packaging help control humidity. Avoid contact with ammonia or acids, which can cause stress corrosion cracking. For long-term storage, consider anti-tarnish paper wraps or vapor corrosion inhibitors.
B2B Procurement Guide
When sourcing brass wire, specify the alloy standard (e.g., ASTM B134 for general purpose), diameter tolerance (±0.02mm is common for precision uses), and temper. Soft temper is ideal for complex bending, while hard temper provides springback resistance. Quantities typically start at 10kg spools for small orders, with bulk purchases (500kg+) offering 10–15% cost savings. Reputable suppliers provide mill test reports certifying composition and mechanical properties. For consistent quality, request samples to verify surface finish and dimensional accuracy. Lead-free alloys (e.g., C26000) are essential for products requiring RoHS or REACH compliance.
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