Overview
Brass flat strip is a cold-rolled or hot-rolled product made from copper-zinc alloys, typically containing 60-90% copper with zinc making up the balance. The material combines copper's excellent conductivity with zinc's mechanical strength and cost-effectiveness. These strips are manufactured through precise rolling processes that achieve tight thickness tolerances (often ±0.02mm) and uniform mechanical properties. Industry standards like ASTM B36 specify requirements for brass strip products, ensuring consistency for industrial buyers.
Physical and Chemical Properties
The properties of brass strips vary significantly with zinc content. Common C26000 alloy (70/30 brass) offers optimal combination of strength (tensile strength 325-550 MPa) and formability. The material's distinctive gold-like appearance makes it popular for decorative applications. Brass demonstrates excellent corrosion resistance in most environments except those containing ammonia or strong acids. Its thermal conductivity (approximately 120 W/m·K) and electrical conductivity (28% IACS for 70/30 brass) make it valuable for electrical components. The alloy is naturally antimicrobial, a property increasingly valued in medical and food handling applications.
Main Applications
In electrical industries, brass strips serve as contacts, connectors, and terminals due to their conductivity and corrosion resistance. The automotive sector uses them for radiator components, lock parts, and decorative trims. The construction industry employs brass strips for architectural accents, door hardware, and window fittings. Musical instrument manufacturers value the material for reed plates and decorative elements. Specialized applications include ammunition components (cartridge cases) and precision engineering parts where machinability is critical.
Safety and Storage
While brass itself poses minimal health risks, machining operations generate dust requiring proper ventilation. Prolonged skin contact may cause minor irritation in sensitive individuals. The material is non-flammable but should be kept away from strong oxidizers. For storage, brass strips should be kept in dry conditions below 40°C relative humidity to prevent surface oxidation (tarnishing). Interleaving with acid-free paper and using vapor corrosion inhibitor (VCI) packaging extends shelf life. Stacking height should be limited to prevent deformation, especially for softer tempers.
B2B Procurement Guide
Industrial buyers should specify alloy grade (common options include C26000, C26800, C28000), temper (soft annealed for forming vs hard for spring applications), and dimensional tolerances. Surface finish requirements (mill finish, polished, brushed) significantly impact pricing. Lead times vary from stock availability (1-2 weeks) to custom production (4-8 weeks). Minimum order quantities typically start at 500kg for standard grades. Quality certifications to request include RoHS compliance and mill test reports confirming chemical composition and mechanical properties.
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