Brazing Aluminum Cladding Coil Hot Rolling Coated Aluminum Strip for Heat Exchange
Brazing Aluminum Cladding Coil Hot Rolling Coated Aluminum Strip is a specialized material used in heat exchange equipment, offering excellent thermal conductivity, corrosion resistance, and weldability. It is particularly suitable for applications in refrigeration, air conditioning, automotive engine cooling systems, and other heat exchangers.
For brazing materials, HC Aluminum can provide aluminum fins, tubes (high-frequency welded tubes, microchannel extruded tubes), and sheets.
Brazing Aluminum Cladding Coil Specifications
| Parameter | Details |
| Core Material | 3003 + 1%Zn / 3003 + 1.5%Zn / 3003 + Zr / 3003 + 0.5%Cu / 3005, etc. |
| Cladding Material | 4343 / 4343 + 1%Zn / 4045 / 4045 + 1%Zn / 4004 / 7072 / 5005, etc. |
| Cladding Rate | 4~18% (per side) |
| Condition | HO / H14 / H16 / H18 / H24 |
| Dimensions | Fins: 0.07 / 0.08 * (16-28) mm |
| Tubes: (0.27-0.32) * (35-75) mm | |
| Plates: (0.6-1.5) * (1070/1000/659) * (500-2500) mm |
Brazing Aluminum Cladding Coil Material Composition and Properties
Brazing Aluminum Cladding Coil Hot Rolling Coated Aluminum Strip typically consists of two or more layers of aluminum alloy materials, including:
- Core Aluminum Alloy Layer: Commonly made of hot-rolled aluminum strips, such as 3003, 4343, 7072, etc. These alloys offer good strength, ductility, and weldability, making them suitable to withstand the mechanical strength and thermal conductivity requirements in heat exchange processes.
- Cladding Layer: Typically made of aluminum-silicon alloy coatings (such as 4343 alloy), this layer is applied through coating or cladding techniques to enhance brazing performance and corrosion resistance. The cladding layer improves the durability of heat exchangers in high-temperature and high-humidity environments.
Brazing Aluminum Cladding Coil Brazing Performance
Brazing is a commonly used joining technology in heat exchangers. The cladding layer of brazing aluminum cladding coil has excellent brazing properties, especially the aluminum-silicon alloy coating, which has a low melting point (typically around 577°C), making it ideal for brazing with aluminum alloys. The presence of the coating promotes the welding of aluminum to aluminum, improving weld quality and avoiding issues like porosity or weak welds.
Heat Exchange Performance
Aluminum alloys have high thermal conductivity, making them especially suitable for heat exchangers. The surface treatment of brazing aluminum cladding coil enhances heat exchange efficiency, ensuring effective heat transfer. Due to the special design of the coating, it helps to reduce heat loss in heat exchangers in high-temperature environments.
Brazing Aluminum Cladding Coil Corrosion Resistance
Aluminum itself has good corrosion resistance, especially when exposed to humid or corrosive climates. The aluminum-silicon alloy coating in the cladding layer further enhances the corrosion resistance of the aluminum strip. The coating can withstand the corrosion of acids, alkalis, salts, and other chemicals, extending the lifespan of the heat exchanger. This property is particularly important in applications such as automotive and air conditioning systems, where heat exchangers are often exposed to moisture, salts, or other corrosive environments.
Processing and Formability
Brazing aluminum cladding coil hot rolling coated aluminum strip has good processability and can be formed into various heat exchanger components by punching, bending, cutting, etc. Its excellent ductility makes it adaptable to the size and shape requirements of different heat exchanger designs.
Processing Method: The aluminum strip can be processed to the required thickness and width through cold rolling and hot rolling processes to meet the size needs of various heat exchanger designs.
Surface Coating Processing: The cladding layer can be adjusted and improved by different coating methods (such as thermal spraying, electroplating, etc.) to enhance brazing performance, corrosion resistance, and surface smoothness.
Applications
Brazing aluminum cladding coil hot rolling coated aluminum strip is widely used in the following industries:
Automotive Industry: Used in radiators, coolers, air conditioning systems, and other heat exchange equipment in vehicles. The aluminum strip can withstand high-temperature environments while providing excellent corrosion resistance and thermal conductivity.
Air Conditioning Industry: Widely used in the manufacturing of condensers and evaporators in household, commercial, and industrial air conditioning systems.
Refrigeration Industry: Used in condensers, evaporators, and other refrigeration equipment to provide efficient heat exchange and ensure long-term stable operation.
Heat Exchanger Industry: Used in various industrial applications, such as cooling and heating systems in chemical, petroleum, and natural gas industries.
Brazing Aluminum Cladding Coil Hot Rolling Coated Aluminum Strip Manufacturing Process
- Hot Rolling: The aluminum strip is processed through hot rolling to form the required thickness and width. Hot rolling improves the aluminum's grain structure, enhancing its strength and toughness.
- Coating: The surface of the aluminum strip is typically coated to enhance its corrosion resistance and oxidation resistance. The coating can be made of polyester, fluorocarbon, or other special coatings, effectively extending the lifespan of the aluminum strip.
- Brazing Treatment: During brazing, the surface of the aluminum strip undergoes special treatment to improve its welding performance with other metals (such as copper or stainless steel). Brazing aluminum technology requires strict conditions, often performed at high temperatures, to ensure the strength and sealing of the weld joints.
Brazing aluminum cladding coil hot rolling coated aluminum strip, with its excellent thermal conductivity, brazing properties, corrosion resistance, and processability, has become an essential material in the manufacturing of heat exchangers. It is widely applied in automotive, air conditioning, refrigeration, and other industries. Its unique aluminum-silicon alloy coating not only improves brazing performance but also enhances the material's durability and long-term reliability, meeting the high demands of modern efficient heat exchange systems.
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