4045 Aluminium Alloy Brazing Strip Coil

2026-04-22

Haomei Aluminum's 4045 aluminum alloy brazing strip coils, with a core formula of 9.0-11.0% silicon content, are the preferred brazing material for automotive, home appliance, and industrial heat exchange applications. Thanks to precise melting point control and excellent flowability, they achieve efficient and reliable metal connections.

Our 4045 aluminum brazing strip coils offer a full range of custom specifications, with thicknesses ranging from 0.05-2.0mm and widths customizable from 100-1250mm. Standard coil weights range from 2-5 tons, and we support slitting and special packaging. Available tempers include O, H12-H18, and H22-H26 to meet different forming and strength requirements. Composite structures can be customized with 4045/3003/4045 three-layer composite or single-layer brazing strips, with the brazing layer thickness precisely controlled at 5-20% of the total thickness to ensure optimal brazing results. All products comply with international standards such as AMS 4772 and EN 573-3 and support third-party testing and certification.

The solidus of 4045 alloy (577℃) and liquidus (600℃) are precisely matched to the in-furnace brazing process, remaining more than 60℃ below the melting point of the base alloy, thus avoiding deformation or performance degradation of the base material. High silicon content imparts excellent fluidity in the molten state, uniformly filling tiny gaps to form an airtight weld joint, with weld strength exceeding 80% of the base material. The strip coil surface undergoes chemical cleaning and passivation treatment to ensure wettability and oxidation resistance during brazing, forming a dense oxide film after welding with corrosion resistance consistent with the base material. Furthermore, its excellent machinability meets the requirements of complex forming processes such as stamping, bending, and shearing, making it suitable for automated production lines.

Haomei Aluminum's 4045 aluminum alloy brazing strip coil have five core advantages:
- 30% Increased Welding Efficiency:
Low melting point and high fluidity reduce heating time, suitable for continuous brazing furnaces, increasing production capacity.
- Excellent Joint Reliability:
Tight metallurgical bonding, leakage rate below 10⁻⁶ Pa・m³/s, suitable for high-pressure conditions.
- Significant cost advantages:
Saves 15-20% on material consumption compared to traditional brazing filler metal, reducing overall production costs.
- Strong customization capabilities:
Silicon content, brazing layer thickness, and surface treatment can be adjusted according to customer needs, providing customized solutions.
- Full-process quality control:
28 quality inspection processes from casting to finishing ensure consistent performance of each roll, with a defect rate controlled below 0.03%.

Production of 4045 aluminum alloy brazing strip coil adopts an integrated casting-rolling + cold rolling + composite + annealing process, achieving full-process control from casting to finished product. Core processes include:
1) Precise proportioning of high-purity aluminum ingots and silicon, vacuum casting to reduce impurities;
2) Hot rolling composite process to achieve metallurgical bonding between the brazing layer and the substrate, with a bonding strength of over 120MPa;
3) Multi-pass cold rolling to control thickness accuracy to ±0.005mm;
4) Atmosphere-protected annealing to precisely control the temperature curve and ensure uniform strip condition;
5) Online surface treatment to remove oxide film and improve brazing performance. Each roll of product comes with a complete quality traceability report, covering key data such as composition, mechanical properties, and brazing effect.

Application scenarios of 4045 aluminum alloy brazing strip coil covered:
1) Automotive: Heat exchange components such as radiators, condensers, and intercoolers, suitable for both new energy vehicles and traditional fuel vehicles;
2) Home Appliances: Air conditioner evaporators and condenser fins, refrigerator and freezer cooling systems;
3) Industrial: Hydraulic oil coolers for construction machinery, generator radiators, and rail transit thermal management systems;
4) Special Applications: Solar collectors, seawater desalination equipment, and lightweight components for aerospace.

As Haomei Aluminum's core product, we provide 24/7 technical support to assist customers in optimizing brazing process parameters. Maintaining a large inventory ensures rapid delivery within 15 days, supporting multiple logistics methods including sea and air freight. A comprehensive after-sales service system provides a 12-month quality guarantee, with full compensation for losses caused by product quality issues.

Choosing Haomei 4045 aluminum alloy brazing strip coils is not just about selecting high-quality materials, but also about choosing an efficient, reliable, and economical heat exchange connection solution. Contact us for a customized quote and technical solution to create new value in the field of thermal management.

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