Overview
Soft brass plate refers to annealed brass sheets with high ductility and formability, primarily composed of copper (∼70%) and zinc (∼30%). This C26000 alloy is favored in industries requiring precise machining due to its excellent workability in the soft temper state. The material's distinctive golden appearance and resistance to dezincification corrosion make it suitable for both functional and decorative applications. Its thermal and electrical conductivity further expands its utility in specialized industrial contexts.
Physical and Chemical Properties
Soft brass plates exhibit a tensile strength of 325-400 MPa in annealed condition, with elongation exceeding 50%. The material demonstrates exceptional cold-working capabilities without cracking, a characteristic derived from its face-centered cubic crystal structure. Chemically, the zinc content provides sacrificial protection against corrosion while maintaining copper's conductive properties. The alloy shows good resistance to freshwater, steam, and petroleum products, though it's susceptible to ammonia and strong acids. Thermal conductivity ranges between 100-120 W/m·K depending on precise composition.
Main Applications
In electrical engineering, soft brass plates serve as contact springs, terminals, and RF shielding components due to their conductivity and EMI protection qualities. The construction industry utilizes them for decorative facades, door hardware, and antique restoration. Industrial applications include precision stamping for plumbing fittings, musical instrument components, and ammunition casings. The material's antimicrobial properties also make it suitable for healthcare fixtures. Recent innovations employ brass plates in heat exchanger manufacturing for HVAC systems.
Safety and Storage
While brass presents lower toxicity than lead alloys, machining operations require dust collection systems to prevent zinc fume exposure. Proper storage involves climate-controlled environments to minimize oxidation; relative humidity should remain below 60%. Annealed brass is particularly susceptible to surface scratches during handling. Interleaving with acid-free paper and edge protection during transport prevents quality degradation. For long-term storage, vapor corrosion inhibitor (VCI) packaging is recommended.
B2B Procurement Guide
Industrial buyers should specify ASTM B36 standards when ordering, with particular attention to temper designation (O60 for fully annealed). Thickness tolerances typically follow ASTM B248 Class A (±5%) or tighter Class B (±3%) for precision applications. Mill test certificates should verify chemical composition and mechanical properties. For large-volume procurement, consider coil stock options to reduce material waste. Just-in-time delivery arrangements help minimize storage-related surface oxidation issues.
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