Introduction
Round Silver Wire is a high-purity, solid precious metal wire engineered for maximum electrical conductivity and exceptional thermal performance. Produced via precision continuous cold-drawing, it delivers a flawless surface finish and uniform grain structure optimized for automated high-speed soldering, stamping, and bonding.
Technical Specifications and Material Properties
|
Material Grade |
Chemical Purity |
Electrical Conductivity |
Mechanical Temper |
Tensile Strength |
Elongation |
Diameter Range & Tolerance |
|
Fine Silver |
99.99% Ag min |
106% IACS min |
Annealed Soft Hard Drawn |
130 – 170 MPa 280 – 340 MPa |
25% - 35% < 5% |
0.05 - 4.0 mm (+/- 0.001 mm) |
|
Sterling Silver |
92.5% Ag, 7.5% Cu |
≥ 85% IACS |
Annealed Soft Hard Drawn |
220 – 300 MPa 450 – 550 MPa |
20% - 30% < 4% |
0.05 - 4.0 mm (+/- 0.001 mm) |
Why Choose Our Manufacturing Facility
High-Purity Material Control: Sourcing only certified 99.99% pure silver bullion with 100% in-house melting and casting to prevent trace contamination by low-melting-point metals.
Certified Technical Authority: Recognized as a National Specialized Precious Metal Supplier with 18 independent patents in high-purity micro-wire drawing technologies.
Secured Supply Chain Continuity: Continuous multi-shift manufacturing lines deliver an annual drawing capacity exceeding 200 tons, ensuring predictable supply security during raw material market shocks.
Full Batch Traceability: Production retains and records are securely archived for 3 years, enabling complete raw material and process tracking within 24 hours of any inquiry.
Quality Guaranteed Policy: Should any material deviate from the agreed technical datasheet, we issue a full replacement or credit refund within 30 days of delivery.
Quality Assurance
ISO 9001:2015 Certified Manufacturing: Full-process statistical controls from raw ingot assaying to final spooling eliminate chemical and dimensional variations.
Global Environmental Compliance: Independently certified by SGS for 100% compliance with EU RoHS Directive (EU) 2015/863 and REACH Regulation (EC) No 1907/2006.
Full Batch Traceability: Every shipment includes an EN 10204 3.1 Mill Test Certificate documenting verified chemical purity assays, tensile load curves, and batch diameter metrics.
Logistics, Packaging & Delivery
Standard Packaging
Vacuum-sealed on DIN125/160/200 plastic spools in anti-oxidation bags, packed in heavy-duty export cartons.
Delivery
3–5 business days for stock items; 14–21 business days for custom alloys/dimensions.
Logistics
Air express (DHL, FedEx, UPS) and sea freight; supports FOB, CIF, and DDP terms.
Frequently Asked Questions
Q: What is the practical difference between fine silver wire and sterling silver wire in manufacturing?
A: Fine silver wire contains 99.99% pure silver and provides the absolute highest electrical conductivity, making it ideal for low-resistance connections. Sterling silver wire includes 7.5% copper, which increases the material's mechanical hardness and tensile strength, making it better suited for parts subjected to high physical wear.
Q: What is the minimum order quantity for a custom round silver wire diameter?
A: For custom wire diameters or specific mechanical tempers outside our standard catalog, our minimum order quantity starts at 10 kilograms. For standard stock sizes, we can provide sample testing quantities as small as 2 kilograms.
Q: How does your factory ensure that fine silver wire does not tarnish during long ocean transit times?
A: We seal every single plastic spool inside an air-tight, multi-layer aluminum foil vacuum bag along with specialized tarnish-preventing desiccants. This isolates the silver from atmospheric sulfur and moisture, ensuring it arrives bright and perfectly ready for soldering.
Q: Can your wire be fed into high-speed automated wire-bonding and welding equipment?
A: Yes. Every spool is precision layer-wound with balanced mechanical tension to eliminate crossovers, snags, or nesting. This uniform payoff tension allows smooth, continuous feeding at high machine speeds without wire breakage.
Q: Is every single batch of silver wire traceable to the original raw material melt?
A: Yes. We maintain a digital tracking system where every finished spool is labeled with a unique batch number. This number traces directly back to the raw material heat test logs, spectrometer analysis reports, and production shift records for 5 years.
Q: Do you provide material data sheets to satisfy incoming quality control protocols?
A: Absolutely. Every delivery includes an official EN 10204 3.1 Mill Test Certificate that clearly details chemical assay metrics, electrical conductivity percentages, tensile strength, and exact tolerance measurements.
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