Thin RA Bronze Foil

CIVEN Metal processes wrought copper-tin alloys compliant with international metallurgical standards: 

Fatigue Performance:

The rolled-annealed copper-tin alloy is suitable for components exposed to repeated bending and cyclic mechanical loading.

Elastic Behavior:

Controlled mechanical properties support predictable spring-back and forming performance in precision stamped components.

Surface Finish:

The current product information specifies surface roughness of Ra ≤0.4 μm, supporting applications where controlled surface condition is important.

Thermal Stability:

The current product information indicates suitability for applications exposed to elevated temperatures, with mechanical properties specified for use up to 150°C.

Solderability & Weldability:

The listed material surface condition is suitable for downstream processes including laser welding, resistance welding and tin plating, subject to application-specific process conditions.

Production Workflow

Raw Material Verification: Incoming copper and tin materials are checked by spectral analysis before entering the production process.

Cold Rolling: Multi-roll mills are used for progressive thickness reduction, with hydraulic gap control supporting consistent foil dimensions.

Controlled Atmosphere Annealing: Continuous furnaces with hydrogen-nitrogen protective atmospheres are used for controlled annealing and oxidation protection.

Precision Slitting: Razor and shear slitting systems are used to control slit width and edge condition, with the current process specifying burr height below 5% of foil thickness.

Quality Inspection Protocol

Laser Thickness Gauging: Online monitoring tracks thickness variation along the coil length.

Mechanical Testing: Tensile strength, yield strength and elongation are checked using universal tensile testing equipment according to the specified production requirements.

Metallographic Analysis: Optical microscopy is used to evaluate grain structure and phase distribution.

Surface Defect Detection: Automated optical inspection checks the foil surface for pinholes, scratches and visible inclusion marks.

Automotive Connectors:

Used for terminal springs, relay blades and sensor contact elements where thin-gauge material, spring behavior and electrical conductivity are required.

Consumer Electronics:

Suitable for miniature battery connectors, shielding components and flex-cable stiffeners used in compact electronic devices.

Telecommunications:

Applicable to high-frequency switch components and lead frames requiring thin, formable conductive material.

Precision Instruments:

Used for diaphragms, bellows and instrument suspension strips where controlled thickness and mechanical properties are important.

Dimensional Adaptability:

Custom thicknesses down to 0.008 mm and non-standard slit widths are available subject to engineering review.

Surface Treatments:

Available options include pre-cleaning, passivation and specific surface roughness profiles for downstream plating and processing requirements.

Traceability:

Each master coil is assigned a unique lot number linked to Mill Test Certificates (MTC), including chemical analysis and mechanical test results.

Moisture Protection:

Coils are vacuum-sealed in anti-corrosion VCI film with silica gel desiccants to reduce exposure to moisture during storage and transportation.

Physical Protection:

Coils are packed in export-grade fumigated wooden crates or heavy-duty cardboard boxes. Available core diameters include 75 mm, 150 mm and 300 mm.

Shipping & Documentation:

Sea freight, air cargo and express courier options are available according to order requirements. Shipment documentation can include the Certificate of Origin, MSDS and Mill Test Certificate (MTC).