Thin RA Bronze Foil

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

High Fatigue Strength: Withstands repetitive mechanical flexing without micro-cracking, preserving contact force in dynamic connector cycles.
Controlled Elastic Modulus: Stable spring-back behavior ensures predictable formability after high-speed progressive die stamping.
Low Surface Roughness: Controlled mechanical rolling achieves Ra <= 0.4 um, reducing friction and wear in sliding electrical contacts.
Thermal Stability: Retains mechanical properties up to 150°C without significant stress relaxation.
Solderability & Weldability: Clean, oxide-free metallic surfaces facilitate reliable laser welding, resistance welding, and tin-plating processes. 

Production Workflow
Raw Material Verification: Spectral analysis confirms the chemical purity of incoming cathode copper and high-purity tin ingots.
Cold Rolling: Multi-roll mills reduce foil thickness progressively, utilizing hydraulic gap regulation to ensure cross-sectional uniformity.
Controlled Atmosphere Annealing: Hydrogen-nitrogen protective atmospheres in continuous furnaces prevent oxidation and control grain size.
Precision Slitting: Razor and shear slitting units control burr height to less than 5% of foil thickness to protect downstream stamping tools.

Quality Inspection Protocol
Laser Thickness Gauging: Continuous online monitoring records deviations along the entire length of the coil.
Mechanical Testing: Universal tensile testers measure yield strength, tensile strength, and elongation per production lot.
Metallographic Analysis: Grain size and phase distribution are verified using optical microscopes at 500x magnification.
Surface Defect Detection: Automated optical systems scan for pinholes, scratches, and inclusion marks. 

Automotive Connectors: Terminal springs, relay blades, and sensor contact elements requiring sustained clamping force under vibration.
Consumer Electronics: Miniature battery connectors, shielding cans, and flex-cable stiffeners.
Telecommunications: High-frequency switch components and lead frames.
Precision Instruments: Diaphragms, bellows, and instrument suspension strips. 

Dimensional Adaptability: Custom thickness down to 0.008 mm and non-standard slit widths available upon engineering review.
Surface Treatments: Options for pre-cleaning, passivation, or specific roughness profiles to match downstream plating requirements.
Traceability: Each master coil is assigned a unique lot number linked to mill test certificates (MTC) detailing chemical analysis and mechanical test results. 

Moisture Protection: Coils are vacuum-sealed in anti-corrosion VCI (Volatile Corrosion Inhibitor) film with silica gel desiccants.
Physical Cushioning: Suspended inside export-grade fumigated wooden crates or heavy-duty cardboard boxes, utilizing horizontal suspension or vertical pallet cradles with core diameters of 75 mm, 150 mm, or 300 mm.
Global Shipping: Standard sea freight, air cargo, and express courier options accompanied by Certificate of Origin, MSDS, and MTC documentation.