Silver-Plated Copper-Clad Steel (SCCS) Wire

FISSOT® Silver-Plated Copper-Clad Steel (SCCS) Wire is an ultra-high-performance bimetallic conductor precision-engineered for military-grade electronics, aerospace telecommunications, high-end RF coaxial cables, and medical medical apparatus pathways. By leveraging advanced Cold Cladding Technology, we combine a metallurgical bond of high-purity oxygen-free copper and an engineered steel core, further enhanced by a premium uniform electroplated silver layer. It is the ultimate choice for critical engineering environments requiring extreme high-frequency conductivity, superior thermal stability, and exceptional durability.

🌟 Key Benefits

⚡ Premium High-Frequency Performance: Capitalizes on the skin effect at microwave and millimeter-wave frequencies, directing signals through the outermost electroplated silver layer to achieve ultra-low attenuation and unmatched signal integrity.
🌡️ Exceptional Thermal Stability: Engineered to operating flawlessly under high-temperature conditions (up to 200°C), making it ideal for harsh military, aerospace, and under-the-hood automotive environments where tin-plated wires fail.
🛡️ Superior Oxidation & Corrosion Barrier: The dense, high-purity silver coating establishes an elite physical shield that strongly resists oxidation, ensuring long-term shelf life and keeping contact resistance at a minimum.
💪 Rugged Mechanical Integrity: Fuses the supreme tensile strength (550–850 MPa) of a specialized steel core with copper-silver cladding, preventing wire breakage during automated high-speed braiding, winding, or heavy mechanical dynamic stress.

🚀 Top Applications

📡 Aerospace & Military RF Cables: Serves as the premier center conductor for high-performance micro-coaxial cables, military defense radar links, and aerospace communication systems.
🔌 High-Reliability Component Leads: Perfectly suited for premium resistor, crystal oscillator, capacitor, and high-frequency diode lead wires requiring zero-defect precision automated soldering.
🚗 Extreme-Environment Wiring Harnesses: Critical for downhole drilling sensors, medical diagnostic electronics, and high-temperature industrial thermal couples demanding fail-safe signal transmission.

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Nominal Diameter (mm)	Tolerance (mm)	Electrical Resistivity (Ω·mm²/m)		Elongation (%)	Tensile Strength (MPa)		Plating Thickness (μm)
Nominal Diameter (mm)	Tolerance (mm)	Soft	Hard	Elongation (%)	Soft	Hard	Plating Thickness (μm)
0.05 ≤ d ≤ 0.1	±0.002	≤ 0.017241	≤ 0.01796	≥ 13%	≥ 196	≥ 350	0.2 — 10
0.1 < d ≤ 0.25	±0.003	≤ 0.017241	≤ 0.01796	≥ 18%	≥ 196	≥ 350	0.2 — 10
0.25 < d ≤ 0.5	±0.004	≤ 0.017241	≤ 0.01796	≥ 20%	≥ 196	≥ 350	0.2 — 10
0.5 < d ≤ 2.0	±d%	≤ 0.017241	≤ 0.01796	≥ 25%	≥ 196	≥ 350	0.2 — 10
Appearance	No scratches, oil, copper exposure, oxidation and other abnormalities
Package	5 inch, 8 inch, 9 inch, 300 type, 400 type rubber disc, 400 type steel disc, 500 type steel disc, etc.
Remark	Can be changed according to customer requirements

Nominal Diameter (mm)	Tolerance (mm)	Electrical Resistivity (Ω·mm²/m)	Elongation (%)	Number of Wires	Lay Direction	Lay Length / Resistance Range	Tensile Strength (MPa)	Plating Thickness (μm)
0.05 ≤ d ≤ 0.09	±0.003	≤ 0.01851	≥ 6%	7 – 100	S or Z	2.0 — 100 mm	≥ 196	0.3 — 2.0
0.09 < d ≤ 0.25	±0.004	≤ 0.01802	≥ 12%	7 – 100	S or Z	2.0 — 100 mm	≥ 196	0.3 — 2.0
0.25 < d ≤ 0.5	±0.005	≤ 0.0177	≥ 15%	7 – 100	S or Z	2.0 — 100 mm	≥ 196	0.3 — 2.0
Appearance	No scratches, oil, copper exposure, oxidation and other abnormalities
Package	DIN200, DIN300, DIN400 rubber disc, 400 type steel disc, DIN500 steel disc, etc.
Remark	Can be changed according to customer requirements

Technical FAQ — Silver-Plated Copper-Clad Steel (SCCS) Wire

What makes silver plating superior to tin plating for FISSOT® SCCS wire applications?

While tin is cost-effective for general electronics, silver plating offers significantly lower electrical resistivity and a much higher melting point. This allows FISSOT® SCCS wire to maintain minimal contact resistance and operate safely in extreme high-temperature environments (up to 200°C) without the risk of plating reflow or whiskers, making it irreplaceable for aerospace and military applications.

How does the "Skin Effect" validate the use of an SCCS conductor in ultra-high-frequency links?

At ultra-high frequencies (UHF) and microwave bands, electrical current ceases to flow through the center of the wire and concentrates entirely on the surface. FISSOT® SCCS wire leverages this phenomenon by placing the most conductive precious silver layer ($Ag$) on the outermost skin. Signals travel effortlessly through this premium layer with zero-attenuation, while the central steel core acts purely as a robust, cost-effective physical support backbone.

Does silver-plated copper-clad steel wire suffer from silver migration or oxidation?

FISSOT® utilizes advanced electroplating controls to achieve a highly dense, micro-crystalline silver layer that exhibits uniform coverage and excellent adhesion. This tight atomic structure dramatically reduces porosity, preventing the underlying copper from diffusing to the surface. While silver can react with trace atmospheric sulfur over long periods, our precise passivation treatments guarantee excellent solderability and stable contact resistance over extended warehousing cycles.

What mechanical advantages does FISSOT® SCCS wire offer compared to solid silver or solid copper wire?

Solid silver wire is prohibitively expensive and lacks tensile strength, while pure copper wire is prone to elongation and snapping under high tension. FISSOT® SCCS wire resolves this trade-off by utilizing an engineered steel core that provides an exceptional tensile strength range of 550–850 MPa. This rigid structure effortlessly withstands the extreme mechanical shear, automatic bending, and dynamic dynamic forces encountered during high-speed braiding and automated assembly.

Which international industrial standards govern the production of FISSOT® SCCS wire?

All FISSOT® SCCS wires are manufactured in strict compliance with standard specifications including ASTM B501 (Standard Specification for Silver-Coated Copper-Clad Steel Wire for Electronic Applications) and ASTM B452. Backed by GENERAL CLAD® elite metallurgical laboratory capabilities, each export batch undergoes stringent concentricity auditing, continuous laser outer-diameter checks, and automated solderability verification with full QC traceability logs.

What specific customization options can clients request for SCCS wire configurations?

We offer multi-dimensional customization to suit precise engineering criteria. Global clients can specify the silver coating thickness layer by weight percentage (e.g., 1.25%, 2.5%, 4.0%, or up to 10% for custom military projects), select copper volume ratios to tune electrical conductivity (such as 21% IACS, 30% IACS, or 40% IACS), and choose between dead-soft annealed or hard-drawn steel core tempers to match precise bending and elongation needs.