Overview
Flexible brass flat bar is a copper-zinc alloy (brass) product engineered for superior malleability, making it easy to bend, stamp, or shape without cracking. Its composition typically includes 60-70% copper and 30-40% zinc, with trace elements like lead for improved machinability. Commonly available in thicknesses of 0.5-6mm and widths up to 300mm, it is favored for applications requiring both formability and durability. Brass flat bars are often supplied in 'soft' or 'annealed' temper, which enhances flexibility. The material’s golden appearance and resistance to tarnishing also make it popular for decorative uses, while its electrical conductivity suits functional applications in electronics and connectors.
Physical and Chemical Properties
The material exhibits a density of approximately 8.5 g/cm³, slightly lower than pure copper, and a melting point around 930°C, depending on zinc content. Its tensile strength ranges from 200-400 MPa, with elongation up to 50% in soft temper grades, allowing significant deformation before failure. Chemically, brass resists corrosion from water, saltwater, and weak acids, though prolonged exposure to ammonia or strong acids can cause dezincification. A natural oxide layer forms on the surface, further protecting against oxidation. Unlike ferrous metals, it is non-magnetic and sparks minimally during machining, enhancing safety in workshops.
Main Applications
In decorative industries, flexible brass flat bars are used for architectural moldings, jewelry findings, and furniture accents due to their aesthetic appeal and ease of shaping. Craftsmen value the material for hand-tooled designs and etched artworks. Industrially, it serves as electrical busbars, switchgear components, and heat exchanger parts, leveraging its conductivity and thermal properties. The automotive sector employs it for radiator fins and lock components, while marine applications benefit from its saltwater resistance. Thin gauges are also punched into washers, gaskets, and shielding plates.
Safety and Storage
Brass poses minimal health risks under normal handling conditions, though dust from grinding or polishing should be avoided to prevent respiratory irritation. Proper ventilation is recommended during machining. The alloy contains no hazardous substances under RoHS directives. Storage requires protection from humidity to prevent surface oxidation or staining. Stack flat bars on pallets with desiccants in sealed packaging for long-term storage. Avoid contact with dissimilar metals (e.g., steel) to prevent galvanic corrosion in damp environments.
B2B Procurement Guide
When sourcing flexible brass flat bars, specify key parameters: alloy grade (e.g., C26000 for cartridges), temper (soft for bending, hard for springs), and dimensional tolerances. Surface finishes—mill, polished, or brushed—affect pricing and usability. Bulk orders (500+ kg) often qualify for discounts, but verify lead times, especially for custom widths or alloys. Reputable suppliers provide material certifications (e.g., ASTM B36) and samples for testing. For export, confirm compliance with regional standards like EU REACH or U.S. ASTM. Spot-check deliveries for dimensional accuracy and surface defects.
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