Raytron Technical Review RESEARCH ARTICLE WP-01-15

SCC vs Pure Silver: Cost-Performance Analysis

RAYTRON Technical Team¹

¹RAYTRON Group, China

Published: March 2026 Version: 1.0

DOI: 10.1234/raytron.2026.WP-01-15

Abstract

Silver-clad copper (SCC) provides silver's surface performance at a fraction of pure silver's cost. This whitepaper examines the cost-performance trade-offs between SCC and pure silver, focusing on RF performance, contact properties, and application value.

Key Findings

Cost Reduction 85% SCC costs only 15% of pure silver while delivering equivalent RF performance
RF Performance Equivalent Thin silver cladding (≥5 μm) provides identical RF performance to solid silver
Surface Conductivity 106% IACS Silver surface achieves the highest conductivity of any metal
Contact Resistance Low & Stable Excellent contact properties for switching and connector applications

Keywords

SCC;silver-clad copper;pure silver;RF performance;contact resistance;cost optimization

1. Introduction

Silver has the highest conductivity of all metals. SCC provides silver's surface advantages with a copper core.

2. Electrical Properties

3. RF Performance

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Figure Fig. 1 Skin Effect Diagram

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Figure Fig. 2 Attenuation Comparison Curves

Thin silver cladding (≥5 μm) provides complete silver RF performance.

4. Contact Properties

5. Cost Analysis

SCC provides 85% cost savings while maintaining performance.

6. Conclusion

SCC delivers performance equivalent to pure silver at 15% of the cost for RF and contact applications.

7. References

ASTM B413. (2020). Silver.

Frequently Asked Questions

What is Silver-Clad Copper (SCC)?

SCC is a bimetallic conductor with a copper core and silver outer layer, manufactured through cladding processes. It provides the superior surface properties of silver at a fraction of the cost of solid silver.

How can SCC match pure silver's RF performance at lower cost?

At high frequencies, current flows primarily on the conductor surface due to the skin effect. A thin silver cladding of 5-10 μm is sufficient to carry all the RF current, making SCC electrically equivalent to solid silver for RF applications while using 85% less silver.

What applications benefit most from SCC?

SCC is ideal for RF cables, coaxial cables, high-frequency connectors, antenna components, switching contacts, and any application requiring silver's surface properties (high conductivity, low contact resistance, oxidation resistance) without the cost of solid silver.

What is the minimum silver thickness required for RF applications?

For most RF applications up to several GHz, a silver thickness of 5-10 μm is sufficient. At 1 GHz, the skin depth in silver is approximately 2 μm, so a 5 μm cladding provides adequate margin for RF current flow.

Does SCC have the same contact properties as pure silver?

Yes, SCC provides equivalent contact properties to pure silver since the contact surface is pure silver. This includes low contact resistance, good solderability, and resistance to oxidation. The copper core does not affect the surface contact characteristics.

Figures

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Fig. 1 Skin Effect Diagram

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Fig. 2 Attenuation Comparison Curves

Tables

Table 1 Conductivity Comparison

Material	Surface	Overall
SCC	106% IACS	100-103% IACS
Pure Silver	106% IACS	106% IACS

Table 2 RF Performance (1 GHz)

Material	Attenuation (dB/100m)
SCC (10 μm Ag)	2.5
Pure Silver	2.5
Pure Copper	2.7

Table 3 Cost Comparison

Material	Relative Cost Index
Silver	1.00
Copper	0.02
SCC-10%	0.15

References

ASTM International ASTM B413: Silver ASTM (2020)

Authoritative References

ASTM International IEC (International Electrotechnical Commission) ISO (International Organization for Standardization) SAE International IEEE