KAK Copper Coated Steel Tubes — also known as Bundy Tubes — are produced through a precise double-wall forming and copper electroplating process. This advanced method ensures excellent heat transfer, corrosion resistance, and long service life.
Features
- Material: Low-carbon steel tube with uniform copper coating
- Outer Diameter: 4.0 – 8.0 mm
- Wall Thickness: 0.5 – 1.0 mm
- Heat Treatment: Soft annealed for easy bending and brazing
- Coating Type: Copper plating with strong adhesion
- Tensile Strength: 280 – 330 MPa
- Yield Strength: 160 – 190 MPa
- Elongation: ≥ 25%
- Hardness: HV 90
- Packaging: Steel reel or customized coil packing
Applications
Our copper-coated steel tubes are widely used in various heat exchange and cooling systems, offering stable performance under different working conditions.
- Refrigerator and freezer condensers
- Cooling and heat exchange coils
- Automotive radiators and oil coolers
- Air conditioning evaporator and condenser tubing
Advantages
Compared with pure copper tubing, KAK Bundy tubes provide strong cost and performance advantages.
- Superior corrosion protection from the copper coating
- Excellent heat transfer and high formability
- Ideal substitute for pure copper tube at lower cost
- Custom coil size and reel packaging available
Why Choose KAK?
With years of OEM experience and strict quality control, KAK ensures each coil meets international standards for HVAC and refrigeration systems. Global shipping and customized orders are available on request.
FAQ
A Bundy tube (copper coated steel tube) is widely used in wire condensers, heat exchangers, and cooling systems for refrigerators, freezers, and air conditioners.
It offers excellent corrosion resistance, good heat transfer, and high strength at lower cost compared with pure copper tubing.
Yes, KAK provides customized diameters (4 – 8 mm), coil lengths, and packaging options to fit various condenser and radiator designs.