Copper Clad Steel Wire

Copper clad steel wire (CCS) combines the high tensile strength of steel as its core and the conductivity properties of copper as its outer layer. The core material is usually low carbon steel and is typically used as either grounding wire or the inner conductor of coaxial cables. Copper clad steel is made to ASTM B-452 standards with 40% conductivity in two tempers: soft and hard drawn.

The steel core alloy can theoretically be any grade suitable for the wire’s end purpose. Copper clad stainless steel (CCSS), in the 300 series as core, may be specified for certain medical applications.

Copper clad steel wire can be produced bare or electroplated with gold, silver, tin, solder, and nickel. Enamel insulations are also an option. See the magnet wire insulation guide for film selections.

Applications of Copper Clad Steel


Intracardiac ablation catheters, neuro-interventional products, atherectomy systems

Power supplies and conversion

Wireless, heavy duty, and custom


Special and nautical applications, torsion springs

Motors and magnetic assemblies

Agriculture, aerospace, oil & gas and other heavy duty applications

Specialty resistors and capacitors

Wireless power transfer systems using inductive coupling through magnetic field

Intelligent pressure and temperature measuring instrumentation

Flowmeters, differential pressure transmitters, thermometers, thermocouples


Copper Clad Steel (40%) Typical Physical and Electrical Properties

IACS DC Conductivity – 40%
% Copper by thickness – 10%
Density – 0.2975 lbs/in3 @ 68°F (8.21 g/cm3 @ 20°C)
Annealed/Soft TemperHard Drawn
Tensile Strength50 kPSI110 kPSI
CCS Advantagemaximum plasticitymaximum strength

Copper Clad Aluminum and Other Clad Metals Data

Download Data Sheet