What is Cold Cladding Technology?
Cold Cladding Technology is an advanced mechanical manufacturing process used to permanently bond two dissimilar metals—such as copper and steel, or nickel and copper—at room temperature. By applying extreme mechanical pressure rather than high heat, the process forces the atoms of the outer cladding metal and the inner core metal to share electrons, creating a seamless, highly durable metallurgical bond.
Unlike traditional electroplating or hot-dipping, cold cladding preserves the original physical properties of the core material while ensuring a uniform, extremely thick, and corrosion-resistant outer layer.
How the Cold Cladding Process Works
Achieving a flawless bimetallic conductor requires precision engineering. The standard cold cladding process involves three critical phases:
- Surface Preparation: Both the core wire (e.g., high-strength steel) and the cladding strip (e.g., pure oxygen-free copper) undergo rigorous mechanical and chemical cleaning to remove all oxides and impurities.
- High-Pressure Roll Bonding: The cladding strip is continuously formed around the core wire. As it passes through specialized precision rollers, massive mechanical pressure is applied. This pressure forces the two pristine metal surfaces together, initiating an atomic-level bond without the need for melting or adhesives.
- Drawing and Annealing: The newly bonded bimetallic wire is drawn through a series of dies to reach the target diameter (from thick rods down to ultra-fine wires below 0.01mm). Finally, bright annealing relieves internal stress and enhances flexibility.
Cold Cladding vs. Electroplating: Why It Matters
For demanding applications in aerospace, automotive wiring, and high-speed rail, the manufacturing method dictates performance. Here is how cold cladding compares to traditional electroplating:
| Feature | Cold Cladding Technology | Traditional Electroplating |
| Bonding Type | Metallurgical bond (Atomic level) | Mechanical/Chemical adhesion |
| Cladding Thickness | Very thick (up to 40% of cross-section) | Extremely thin (usually micro-inches) |
| Corrosion Resistance | Excellent (Seamless, non-porous layer) | Moderate (Prone to microporosity and flaking) |
| Concentricity | Highly uniform across the entire length | Can be uneven, especially on edges |
| Environmental Impact | Eco-friendly (No toxic chemical baths) | High (Involves hazardous chemical disposal) |
Applications of Cold Cladded Conductors
Because the metallurgical bond formed by cold cladding will not flake, crack, or delaminate even under severe bending or thermal cycling, it is the standard for high-performance bimetallic wires:
- Copper Clad Steel (CCS) Wire: Combines the high tensile strength of steel with the conductivity of copper, perfect for grounding systems and automotive lightweighting. (Note: Add internal link here pointing to your CCS product page)
- Nickel Clad Copper (NCC) Wire: Engineered for extreme high-temperature and highly corrosive environments, offering superior oxidation resistance. (Note: Add internal link here pointing to your NCC product page)
- Copper Clad Aluminum (CCA) Wire: Provides excellent conductivity at a fraction of the weight of pure copper, ideal for coaxial cables and voice coils. (Note: Add internal link here pointing to your CCA product page)
FISSOT: Advancing Cladding Technology
Not all cold cladding processes are created equal. As a technology-driven enterprise and a primary drafting unit for the ISO 14811:2025 international standard (Ultra-low carbon high boron steel wire rod for copper cladded wire), FISSOT® has refined cold cladding over more than a decade. With over 20 proprietary patents, our manufacturing facility delivers unparalleled precision, ensuring that every spool of wire meets the strictest global standards.