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What Are the Electrical Properties of Copper Clad Steel Coil

Jul. 21, 2023

Copper clad steel (CCS) coil is a composite material consisting of a steel core coated with a layer of copper. The combination of these two metals creates a material that exhibits unique electrical properties, making it suitable for various applications in the electrical and electronics industries. Understanding the electrical properties of copper clad steel coil is essential for assessing its performance and determining its suitability for specific applications. Let's explore the key electrical properties of CCS coil in detail:


1. Electrical Conductivity:

   - Copper is renowned for its exceptional electrical conductivity, ranking second only to silver among commonly used metals. The copper layer in the CCS coil provides excellent conductivity, allowing for efficient transmission of electric current.

   - The electrical conductivity of copper is usually measured in terms of International Annealed Copper Standard (IACS) percentage. IACS represents the conductivity of pure annealed copper, which has a value of 100%. CCS coils typically have electrical conductivities ranging from 15% to 40% IACS, depending on the copper thickness and steel core characteristics.


2. Low Resistivity:

   - The low electrical resistivity of copper ensures that the CCS coil experiences minimal energy loss when carrying electric current. This property is especially crucial in applications where energy efficiency and low power losses are essential.


3. Skin Effect Mitigation:

   - The skin effect refers to the tendency of alternating current (AC) to flow more on the surface of a conductor than in its interior. Copper's high conductivity helps mitigate the skin effect in CCS coils, allowing for more uniform current distribution and reduced power losses in high-frequency applications.


Copper clad steel (CCS) coil

4. RF Performance:

   - CCS coil's excellent electrical properties make it suitable for radio frequency (RF) applications. Its low resistivity and effective mitigation of the skin effect enable efficient transmission and reception of RF signals, making it valuable in RF antennas, transmission lines, and wireless communication systems.


5. Thermal Conductivity:

   - Copper has excellent thermal conductivity, which can be beneficial in certain electrical applications where heat dissipation is a concern. The copper layer in the CCS coil helps in dissipating heat generated during electrical operation, preventing overheating.


6. Electromagnetic Shielding:

   - Copper's high electrical conductivity makes CCS coils effective for electromagnetic shielding purposes. It can provide a conductive barrier to block or redirect electromagnetic interference (EMI) and radio frequency interference (RFI) in electronic devices and systems.


7. Solderability and Weldability:

   - The copper layer on CCS coils ensures good solderability and weldability. Copper has excellent compatibility with soldering processes, allowing for secure connections with other electrical components or circuitry.


8. Corrosion Resistance:

   - Copper's natural corrosion resistance is advantageous in CCS coils. It protects the steel core from oxidation and rust, maintaining the coil's electrical performance and structural integrity over time.


9. Electroplating Capability:

   - The presence of a copper layer allows CCS coils to be further electroplated with various metals, expanding their range of applications. Electroplating with materials like tin, silver, or nickel can enhance the coil's performance in specific environments or provide better solderability.


10. Conductor Efficiency:

   - Due to copper's high conductivity, CCS coils offer efficient current transmission and reduced energy losses. This efficiency is particularly important in power distribution systems, motors, transformers, and electrical transmission applications.


11. Contact Resistance:

   - The copper layer in CCS coils provides a low contact resistance, ensuring effective electrical contact and minimal energy loss when connecting the coil to other components or electrical devices.


12. Current Carrying Capacity:

   - The combination of copper steel in CCS coils provides an optimum balance between electrical conductivity and mechanical strength. This allows the coil to handle significant current loads without compromising its structural integrity.



In summary, copper clad steel coil possesses several key electrical properties that make it a versatile material for various electrical and electronic applications. Its high electrical conductivity, low resistivity, thermal conductivity, and electromagnetic shielding capabilities make it suitable for use in power transmission, RF applications, grounding systems, antennas, and more. The copper layer's solderability, corrosion resistance, and electroplating capability add to its appeal as an efficient and reliable conductor in diverse electrical environments. By leveraging the unique electrical properties of copper clad steel coil, engineers and manufacturers can design and implement efficient and cost-effective solutions in numerous electrical and electronic applications.

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