Stock code: 601677
Stock code: 601677
In modern industrial manufacturing, especially in the automotive, HVAC, and refrigeration sectors, the performance of heat exchangers directly determines the efficiency, reliability, and lightweight potential of entire systems. Facing increasingly stringent energy efficiency standards and space constraints, manufacturers are constantly seeking a foundational solution that can simplify processes, enhance performance, and ensure long-term reliability. The key to addressing these challenges lies in a specialized aluminum material.
It is a high-performance “sandwich-style” aluminum sheet engineered specifically for furnace brazing processes. Typically, it consists of a high-strength core (like AA3003 aluminum-manganese alloy) clad with one or two layers of a low-melting-point alloy (like AA4045/4345 aluminum-silicon alloy), bonded through precise rolling technology. During brazing, the cladding alloy melts and, via capillary action, uniformly fills the joints, while the core remains solid to maintain the component’s structure. This integrated design of filler metal and base material fundamentally innovates traditional manufacturing methods.
The pre-applied cladding melts uniformly in a controlled brazing furnace, forming smooth, dense, and continuous seams. This significantly reduces the risk of leaks caused by uneven filler metal application or oxidation, greatly improving product yield and long-term sealing reliability.
Eliminating the separate step of adding brazing wire or paste simplifies component assembly, making it more suitable for automated, large-scale production. This reduces production steps, labor costs, and potential defects or contamination from additional handling.
* Corrosion Resistance: Both the core alloy and the resulting brazed joint offer good corrosion resistance, ensuring a long service life for heat exchangers in demanding environments.
* High Strength & Lightweight: The inherent lightness of aluminum, combined with a high-strength core, makes it the ideal choice for reducing equipment weight and improving energy efficiency.
This material is perfectly suited for the two mainstream processes: Flux-free Controlled Atmosphere Brazing (CAB) and Vacuum Brazing (VB), providing designers with broad flexibility to create more compact and efficient heat exchange structures.
* Automotive Industry: Engine radiators, intercoolers, automotive AC evaporators & condensers, power battery cooling plates.
* HVAC (Heating, Ventilation, and Air Conditioning): Heat transfer fins for residential/commercial AC units, condenser coils.
* Industrial Refrigeration & Power: Heat exchange cores for chillers, refrigeration units, and compressor intercoolers.
* Other Advanced Fields: Aerospace environmental control systems, solar thermal collector plates.
To ensure project success, focus on these points during selection:
* Cladding Alloy & Ratio: AA4045 offers better flow, while AA4345 provides higher joint strength. The cladding ratio (typically 10%-15% of total thickness per side) directly affects the amount of filler metal available.
* Core Alloy: AA3003 is common. For higher strength, consider AA3005 or similar grades.
* Temper: Usually supplied in “O” temper (fully annealed) to ensure excellent formability for stamping.
* Specifications & Tolerances: Precise thickness, width, and flatness tolerances are fundamental for smooth automated assembly.
We recommend discussing your specific application, brazing process type (CAB/VB), and key requirements for strength and corrosion resistance with your supplier to obtain the optimal product match.
As a leading domestic supplier of aluminum sheet, strip, and foil, Mingtai Aluminum has deep expertise in aluminum processing. Our clad brazing sheet is produced in strict compliance with international standards like AMS/ASTM. With stable chemical composition, precise cladding control, and superior sheet flatness, we are committed to being your most reliable materials partner for building high-performance heat exchangers. Let our robust products help transform your designs into more competitive realities.
* Q: Can this brazing sheet be used for torch brazing?
A: It is not recommended. This material is designed specifically for furnace brazing (CAB or Vacuum), which provides the uniform heating and specific atmosphere needed for the cladding to melt effectively.
* Q: How is corrosion resistance after brazing ensured?
A: The key lies in selecting a compatible core and cladding alloy combination and controlling the brazing process strictly. This ensures the formation of a uniform, dense seam with optimal corrosion resistance.
* Q: Does the material require special cleaning before brazing?
A: Yes. Even though the CAB process includes a fluxing action, it is essential to ensure the material surface is clean, free from heavy oils or oxide layers, to achieve the best filler metal wetting and flow. Degreasing is typically recommended.
