Name: China High-Conductivity RA Bronze Foil Manufacturers Suppliers Factory - Civen Metal
Brand: Civen
SKU: 315668953

Civen Metal Material (Shanghai) Co., Ltd. is one of the leading manufacturers and suppliers of high-conductivity ra bronze foil in China. Welcome to buy bulk durable high-conductivity ra bronze foil made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.

Technical Specifications

Parameter	Standard Range	Test Method / Standard
Thickness	0.012 mm - 0.100 mm (+/- 0.001 mm)	Micrometer / Laser Gauge
Width	5 mm - 600 mm (+/- 0.05 mm)	Slitting Edge Inspection
Electrical Conductivity	15% - 35% IACS	Eddy Current Meter
Tensile Strength	350 - 750 MPa (Temper Dependent)	ASTM E8 / GB/T 228
Elongation	2% - 40%	ASTM E8
Surface Roughness	Ra <= 0.4 um	Stylus Profilometer
Camber	<= 2 mm per 1000 mm length	Optical Comparator

Key Performance Characteristics

Electrical Conductivity and Mechanical Stability

The copper-tin alloy composition provides electrical conductivity while retaining the mechanical characteristics required for precision components. Depending on alloy composition and temper, conductivity is specified at 15–35% IACS, with tensile strength ranging from 350 to 750 MPa.

Flex Fatigue Performance

Controlled cold rolling and recrystallization annealing produce a fully recrystallized grain structure. This makes the material suitable for components exposed to repeated bending or movement, including flexible electrical connections and contact components.

Controlled Surface Finish

The foil has a specified surface roughness of Ra ≤0.4 μm. Bare finish, anti-tarnish passivation and customized roughness profiles are available according to the intended processing or bonding requirements.

Applications

High-conductivity RA bronze foil can be used where electrical conductivity, mechanical stability and thin-gauge flexibility need to be considered together.

Flexible Printed Circuits - Used for dynamic grounding layers and signal-related components in flexible electronic assemblies.

Miniature Connectors - Suitable for contact springs, battery terminals and sockets requiring repeated insertion and stable contact.

EMI and RFI Shielding - Used as foil or wrapping material for shielding components in aerospace and telecommunications cables.

Precision Instruments - Applicable to diaphragms, bellows and current-carrying suspension strips used in sensors and meters.

Manufacturing and Quality Control

CIVEN Metal produces the foil through a controlled sequence of casting, precision cold rolling, annealing, tension leveling and slitting.

Automatic gauge control is used during rolling to maintain thickness consistency across the coil. Controlled annealing supports recrystallization and surface quality, while precision slitting is used to produce narrow-width coils with controlled edges and winding tension.

Quality inspection includes online pinhole detection, conductivity testing, dimensional inspection and batch tensile testing. Mill Test Certificates (MTC) are supplied with shipments according to the current product information.

Customization and OEM Supply

For projects requiring specifications outside the standard range, CIVEN Metal lists several customization options.

Alloy Composition

Copper-tin alloy composition can be adjusted according to the required balance between electrical conductivity and mechanical properties.

Thickness and Width

Non-standard thicknesses and narrow-width slit coils can be produced according to project requirements. The listed standard width range is 5–600 mm.

Core Dimensions

Specific inner-diameter core requirements can be accommodated, including the currently listed 76 mm and 150 mm options.

Surface Treatment

Available options include bare finish, anti-tarnish passivation and customized surface roughness profiles.

For a quotation, buyers can provide the required alloy grade, thickness, width, temper, core size and surface requirement for evaluation.

Packaging and Delivery

RA bronze foil is wound on rigid plastic or steel cores for coil protection during transportation. The current product information also lists moisture-barrier packaging with VCI protection and desiccants, together with export-grade wooden crate protection.

Each master coil or slit roll can be identified by production and material information for shipment traceability.

Why CIVEN Metal

Direct Mill Production: In-house integration from raw material casting to final precision slitting eliminates intermediary supply chain variance.
Process Reproducibility: Automated rolling mills and closed-loop annealing controls maintain mechanical and electrical property variance within +/- 3% across production lots.
Global Compliance: Certified under ISO 9001, IATF 16949, RoHS, and REACH directives.

FAQ

Q: What thicknesses are available for high-conductivity RA bronze foil?

A: The listed thickness range is 0.012 mm to 0.100 mm, with a thickness tolerance of ±0.001 mm.

Q: What is the electrical conductivity of the RA bronze foil?

A: The current specification lists electrical conductivity of 15–35% IACS, depending on alloy composition and temper.

Q: Can the bronze foil be supplied in custom widths?

A: Yes. The standard width range is 5–600 mm, and the product page also lists narrow-width slit coils and non-standard dimensions as customization options.

Q: Can CIVEN Metal provide material documentation?

A: Yes. The current product information states that Mill Test Certificates (MTC) are supplied with shipments, covering material and performance data.

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