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Copper clad aluminum sheet is a bimetallic composite material with a special structure and characteristics. It includes copper-aluminum layered composite, copper-aluminum welded transition or special-shaped processing parts. The appearance structure is diverse. Characteristics and applications of copper clad aluminum sheet are as follows

  1. High strength:The copper clad aluminum sheetis made of high-strength copper and lightweight aluminum through a special process. It has high strength and rigidity and can withstand large forces and pressures.
  2. Lightweight:Compared with pure copper materials, the copper clad aluminum sheethas a lower density due to aluminum’s addition, making the overall weight lighter and easier to carry and install.
  3. Corrosion resistance:The copper clad aluminum sheethas good corrosion resistance, can be used in various harsh environments, and is not easily influenced by factors such as oxidation, corrosion, and erosion.
  4. Conductive properties:Due to the good conductivity of copper, copper clad aluminum sheets have lower resistance and can be used in applications requiring conductive properties.
  5. Aesthetics: The surface of the copper clad aluminum sheetis smooth and uniform, the color is metallic, and it has a good decorative effect and ornamental value.

The application industries of copper clad aluminum sheet row are very wide

  1. Electrical industry:copper clad aluminum sheets can be used to manufacture electrical wiring boards, insulators and conductive components. They are used in power transmission, distribution systems and electronic equipment. They have good conductivity and corrosion resistance.
  2. Industrial machinery:copper clad aluminum sheets can be used to manufacture parts of industrial equipment, such as fan blades, turbine blades, etc. while ensuring strength while reducing overall weight and improving mechanical efficiency.
  3. Ship manufacturing: copper clad aluminum sheets are often used in seawater cooling systems, propellers and hull anti-corrosion in ship manufacturing and can resist corrosion and pressure in the marine environment.
  4. Architectural decoration:copper clad aluminum sheets can be made into various building decoration materials, such as wall panels, ceilings, roofs, doors and windows, etc. Its metallic luster and aesthetic performance can enhance the overall visual effect of the building.
  5. Other fields:copper clad aluminum sheets can also be used in automobile manufacturing, aerospace, chemical equipment and other fields to meet the needs of different industries. In short, copper clad aluminum sheets have wide application prospects in many fields because of their high strength, lightweight, corrosion resistance, electrical conductivity and aesthetics.

Detailed introduction to the benefits and disadvantages of copper-aluminum composite panels with different processes

1. Cold rolling composite technology: using polymer materials to bond two metals together.

Its advantages are simple technology and easy mass production

Its disadvantages are:

1) It is not resistant to high temperatures. The universal glue (epoxy resin) between metals cannot be heated and will open when the temperature is below 230°.

2) The glue application is uneven and bubbling and peeling may easily occur.

3) Short life. Epoxy resin is a chemical product that will age after being used for a time, easily falling off and delaminating.

4) The composite strength is low, and the product cannot be subsequently processed by rolling, bending, cutting, stamping, etc.

2. Hot rolling composite technology

The surface of two metal materials is roughened, the blank is heated online through an induction furnace, then rolled and composited through a small rolling mill (steel rolling mill). The energy conversion generated by rolling is used to composite the two metals. Together. Its disadvantages are that the contact strength is low, it cannot meet its conductive needs, and it cannot be bent at right angles.

3. Copper plating technology

Copper plating surface treatment is performed on metal through chemical reaction! The copper plating technology will be different on different materials. Copper plating on iron parts must go through chemical degreasing, electric leather degreasing, pre-plating of nickel or copper, thickening of copper sulfate, and post-processing. In stainless steel electroplating, the surface copper thickness is generally 30m-40m. It cannot be used for conductive work, and it is easily damaged and difficult to repair.

4. Solid-liquid composite technology

Inject aluminum water into the copper tube and control product standards through a stretching machine.

Its advantages are:

  • All-inclusive composite, beautiful appearance.
  • No aluminum leakage.
  • Short production period.
  • Single product standard.
  • Large quantities of ready stock.

Its disadvantages are

1) When the product solidifies and shrinks in the copper mold, it cannot be filled, forming a thicker eutectic layer, and cannot be continuously rolled to form a relatively thin strip product.

2). Affected by the eutectic layer (the eutectic layer is Al2O3 and is brittle), the contact strength is low. Therefore, the bending angle is more than 2 times the R angle, and traditional copper bar bending technology cannot be used, as the copper layer is prone to breakage.

3) The pole row of the casting technology is 150mm wide and 6m long. The surface of the copper layer is a cast structure, and some structural defects such as pores and mixing are present. The thickness of the copper layer is uneven, and some parts are prone to aluminum leakage.

5. Solid compounding, production technology

During manufacturing, the surfaces of copper tubes and aluminum rods are first roughened, and then the aluminum rods and copper tubes are compounded together under tension through a stretching machine. The mechanical energy is converted into heat by the surface. The concave and convex interweaving mosaics are combined together. The copper strip needs to be very thin, generally about 0.3-0.5mm. Its shortcomings are that the composite strength is low and false connections are easy to occur between the copper tube and the aluminum rod, so the conductivity needs to meet the national standard.


TRUNNANO is a supplier of copper aluminum alloy with over 12 years experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality copper aluminum alloy, please feel free to contact us and send an inquiry.

By admin

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