Introduction
Silver Tin Oxide (AgSnO2) Wire is a cadmium-free, high-density composite contact material engineered via advanced powder metallurgy for low-voltage switching infrastructure. It delivers an environmentally compliant, high-endurance solution for manufacturing electrical contacts that must withstand severe inrush currents and heavy arcing without welding.
Key Performance Features
High-Thermal Stability: The built-in tin oxide phase withstands extreme heat without decomposing, preventing material vaporization, warping, or shape shifting during heavy electrical arcing.
Advanced Anti-Welding Properties: Fine oxide particles disrupt the formation of large molten silver pools during contact bounce, preventing surface fusion and ensuring smooth switch separation.
100% Cadmium-Free Compliance: Zero toxic cadmium content ensures seamless alignment with strict European and North American environmental mandates, eliminating global regulatory delays.
Extended Component Lifespan: Superior arc erosion resistance minimizes contact mass loss over time, extending the operational lifespan of your final relays and switches under AC-3 / AC-4 utilization categories by up to 30%.
Technical Specifications and Material Properties
|
Material Grade / Compound |
Total Oxide Content |
Electrical Conductivity |
Tensile Strength Range |
Hardness Range (HV) |
Standard Elongation |
|
AgSnO₂ (10) |
8.5% – 10.5% |
≥ 72% IACS |
220 – 360 MPa |
70 – 105 HV |
12% – 22% |
|
AgSnO₂ (12) |
10.6% – 12.5% |
≥ 65% IACS |
240 – 400 MPa |
80 – 120 HV |
10% – 18% |
OEM & Customization Capabilities
Bi-Metal Clad Formats: Custom manufacturing of bi-metal wires combining an AgSnO2 functional outer layer over a copper or copper-alloy core, drastically optimizing raw precious metal expenditures.
Bespoke Tensile & Hardness: Precise fine-tuning of inline annealing parameters to match the wire's spring-back properties to the exact specifications of your high-speed stamping tools.
Custom Geometric Profiles: Precision drawing lines supply flat ribbons, square wire, or custom-shaped profiles manufactured directly to your engineering blueprints.
Why Choose Us
Vertical Processing Control
100% in-house manufacturing-from raw elemental silver casting and atomization down to fine wire drawing-completely eliminates trace contaminants that compromise contact reliability.
Secured Supply Chain Capacity
Automated multi-line drawing plants deliver an annual capacity exceeding 400 tons, ensuring Tier-1 industrial buyers maintain a continuous supply chain during raw material market shocks.
Patented Metallurgical Innovation
Driven by an in-house R&D laboratory holding 16 independent patents specifically in precious metal composite configurations.
Quality Assurance
Every batch undergoes rigorous testing to guarantee compliance with global engineering standards:
• ISO 9001:2015 certified manufacturing processes.
• Full compliance with RoHS and REACH directives, ensuring environmentally safe and traceable raw materials.
• In-house testing includes SGS material analysis, eddy current testing for surface flaws, and laser micrometer tolerance verification. Each shipment includes a formal Mill Test Certificate (MTC).
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: Can AgNi directly replace AgCdO in my existing relay design without modifying the contact geometry?
A: In the majority of resistive and mild inductive loads (under 10A), AgNi serves as a direct drop-in, eco-friendly replacement. However, for high-inrush inductive loads where severe arcing occurs, we recommend confirming with our engineering team to evaluate if a change to AgSnO₂ or a shift to a higher nickel content (like AgNi20) is required.
Q: How does the nickel content percentage (10% vs 20%) affect the performance of the alloy?
A: Increasing nickel content improves the material's mechanical hardness, arc-erosion resistance, and anti-welding properties. However, it also reduces overall electrical conductivity. AgNi10 is chosen for high conductivity and low contact resistance, while AgNi20 is preferred for higher mechanical switching frequencies and heavier loads.
Q: How do you prevent internal porosity in your AgNi alloys during the manufacturing process?
A: We use high-pressure powder compacting followed by closely monitored liquid-phase protective atmosphere sintering and subsequent high-ratio cold working. This process achieves an actual material density exceeding 99.5% of the theoretical density, effectively eliminating internal porosity.
Q: Are your materials completely free of conflict minerals?
A: Yes. We enforce a strict Responsible Minerals Sourcing policy. All silver and nickel raw materials are sourced exclusively from LBMA-certified refiners and conflict-free verified smelters, fully meeting Western corporate compliance mandates.
Q: Can you provide customized tape-and-reel packaging for automated pick-and-place manufacturing?
A: Yes. Our stamping and components division can supply finished AgNi contact tips or bimetal stampings on standard carrier tapes or specialized plastic trays engineered to interface directly with your automated high-speed production assembly lines.
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