Thin Brass Strips

●Cadmium-Free Thin Brass Strips

●Cadmium-Containing Thin Brass Strips

Product Features

Material Characteristics

High conductivity: copper content 60%-70%, low resistivity, suitable for conductive scenes such as electronic components and connectors.

Corrosion resistance: zinc element forms a protective film, resists atmospheric corrosion, and prolongs service life.

Mechanical properties: tensile strength ≥340MPa, elongation ≥25%, meeting the processing requirements of stamping, bending, etc.

Processing performance

Easy to form: uniform thickness (±0.01mm), deep drawing, stretching and other complex forming can be achieved.

Weldability: supports brazing and resistance welding, with high weld strength, suitable for precision connection.

Surface quality: surface finish Ra≤1.6μm, can be directly used for electroplating and painting.

Environmental protection and safety

RoHS compliance: the content of harmful substances such as lead and cadmium is lower than the EU standard, suitable for export products.

Recyclability: brass recovery rate exceeds 90%, in line with the concept of green manufacturing.

Technical process

Melting and casting

Vacuum induction furnace smelting is used to control the copper-zinc ratio (such as H62 brass: Cu 60.5%-63.5%, Zn balance).

Semi-continuous casting process, the internal structure of the ingot is dense, and segregation is reduced.

Hot rolling and cold rolling

Hot rolling: rolling at 750-830℃ to eliminate casting stress and obtain initial thickness.

Cold rolling: multiple cold rolling to the target thickness, the total processing rate is more than 75%, and the dimensional accuracy is ensured.

Annealing and surface treatment

Annealing: 520-650℃ annealing eliminates work hardening and restores plasticity.

Surface treatment: tin plating, nickel plating or passivation treatment to improve corrosion resistance and welding performance.

Quality inspection

Chemical composition analysis: ICP-OES spectrometer detects the content of copper, zinc, lead and other elements.

Mechanical properties test: Tensile testing machine detects tensile strength, yield strength and elongation.

Dimensional accuracy: Laser thickness gauge detects thickness deviation to ensure ±0.01mm tolerance.

Application field

Electronics and electrical

Connectors: Welding copper terminals and galvanized cables to reduce contact resistance and improve signal transmission stability.

Relays: Stamping into contact springs, arc erosion resistance, and life extension of 30%.

Battery components: Welding copper foil and battery tabs to reduce heat loss and increase energy density.

Automobile manufacturing

Radiator: Welding brass water pipes and aluminum heat sinks to improve heat conduction efficiency.

Sensors: Stamping into shells, corrosion resistance, and adapt to high temperature environments of engines.

Airbags: Welding detonator copper sheets to ensure signal triggering reliability.

Building decoration

Curtain wall system: bend into decorative strips, chrome-plated surface to resist salt spray corrosion, suitable for seaside buildings.

Lighting accessories: stretched into lampshade skeleton, good light transmittance and beautiful shape.

Bathroom hardware: welded faucet valve core, wear-resistant, service life over 10 years.

Precision instruments

Watchmaking: stamped into gears and springs, with an accuracy of 0.01mm and a travel error of <1 second/day.

Medical equipment: welded catheter joints, good biocompatibility, in line with ISO 13485 standards.

New energy field

Photovoltaic inverter: welded copper busbars and IGBT modules to reduce thermal resistance and improve conversion efficiency.

Energy storage battery: stamped into busbars, high conductivity, and reduced internal resistance.

Maintenance recommendations

Storage environment

Temperature: 15-25℃, humidity ≤60%, avoid oxidation caused by moisture.

Packaging: vacuum sealed or wrapped in moisture-proof paper, away from acidic and alkaline substances.

Processing precautions

Preheat to 100℃ before stamping to reduce the risk of material hardening.

Use argon protection during welding to prevent the volatilization of zinc elements.

Surface maintenance

Wipe regularly with a neutral detergent and avoid using chlorine-containing detergents.

Re-plating should be performed in time after the coating is worn to prevent local corrosion.