4104 Aluminum Brazing Sheet: A High-Quality Aluminum-Based Material for Industrial Welding

In modern industrial welding systems, the demand for welding aluminum and aluminum alloys is increasing. As a high-performance aluminum-based welding material, the 4104 aluminum brazing sheet plays an irreplaceable role in numerous industries due to its unique advantages, becoming a key enabler for efficient industrial production.

I. Precisely Balanced Chemical Composition: The Foundation of Performance

The exceptional performance of the 4104 aluminum brazing sheet stems from its scientifically precise chemical composition. Its primary component is aluminum (Al) as the base, supplemented by several key elements. Silicon (Si) content is controlled between 9.0% and 10.5%, with this high silicon content being one of the core factors contributing to its excellent welding and high-temperature performance. Iron (Fe) content is ≤0.8%, copper (Cu) ≤0.25%, manganese (Mn) ≤0.10%, magnesium (Mg) between 1.0% and 2.0%, zinc (Zn) ≤0.20%, and bismuth (Bi) between 0.02% and 0.20%. Other elements are strictly limited, with each individual element ≤0.05% and the total of all other elements ≤0.15%. This meticulously designed composition provides a solid foundation for the stable performance of the 4104 aluminum brazing sheet, ensuring reliable quality under various working conditions.

II. Outstanding Performance Characteristics: Core Advantages

(I) Excellent Welding Performance

The 4104 aluminum brazing sheet belongs to the aluminum-silicon alloy welding wire category and demonstrates excellent process performance during welding. It provides a stable arc, effectively reducing spatter during the welding process, resulting in aesthetically pleasing and bright weld seams, which significantly reduces the need for subsequent grinding and other finishing operations. Compared to common welding materials like 4043, the 4104 aluminum brazing sheet has a lower melting point and a narrower solidification range. This characteristic improves the fluidity of the molten pool, allowing for better filling of weld gaps and significantly reducing the tendency for hot cracking, thereby enhancing the quality of welded joints. Additionally, it increases the shear strength of fillet welds, further ensuring the stability and reliability of welded structures to meet the demands of various complex welding scenarios.

(II) Superior High-Temperature Performance

The high silicon content endows the 4104 aluminum brazing sheet with excellent heat and wear resistance, making it highly valuable in the manufacturing of components such as forged pistons, where extreme heat and wear resistance are required. Furthermore, the synergistic effect of copper and nickel elements in the material further enhances the high-temperature strength and corrosion resistance of the 4104 aluminum brazing sheet, enabling it to withstand prolonged use in continuous high-temperature environments (e.g., above 65°C). Under such high-temperature conditions, the 4104 aluminum brazing sheet maintains stable performance without significant degradation due to excessive temperatures, providing strong support for the long-term stable operation of related equipment.

III. Flexible and Diverse Specifications: Meeting Various Needs

The 4104 aluminum brazing sheet offers high flexibility in specifications and dimensions, providing diverse options to meet the practical needs of different industries and application scenarios.

(I) Thickness Specifications

Common thickness specifications include 0.07mm, 0.10mm, 0.20mm, and 0.50mm, which cater to most standard welding requirements. Additionally, to address specific industrial scenarios, customized products with thicknesses ranging from 0.1mm to 4.0mm are available. Whether for precision welding of highly accurate components or large structural welding with specific thickness requirements, the 4104 aluminum brazing sheet can be perfectly adapted by adjusting its thickness specifications.

(II) Width Specifications

In terms of width, the 4104 aluminum brazing sheet is available in various standard specifications such as 150mm, 200mm, 270mm, 500mm, and 1000mm, covering a wide range of needs from small component welding to large equipment manufacturing. For customers with special dimensional requirements, manufacturers also offer personalized width customization services to ensure precise matching with specific welding workpiece dimensions, improving welding efficiency and quality while minimizing material waste.

IV. Broad and Diverse Application Fields: Empowering Industries

Thanks to its excellent performance and flexible specifications, the 4104 aluminum brazing sheet is widely used in multiple key industries, playing a vital role in empowering industrial development.

(I) Heat Exchanger Industry

In the heat exchanger industry, the 4104 aluminum brazing sheet is a commonly used material for vacuum brazing of aluminum heat exchangers. Its excellent welding performance and high-temperature resistance ensure that aluminum heat exchangers maintain high thermal exchange efficiency and stable structural performance over long-term use. As a result, the 4104 aluminum brazing sheet is widely applied in the manufacturing of heat exchange equipment such as automotive radiators, air conditioning pipes, and oil coolers. These devices are indispensable in fields like automotive, air conditioning, and industrial cooling systems. The use of the 4104 aluminum brazing sheet provides critical assurance for the quality and performance of these devices, driving technological advancement and product upgrades in the heat exchanger industry.

(II) Other Important Fields

Beyond the heat exchanger industry, the 4104 aluminum brazing sheet also finds important applications in other areas. In mechanical manufacturing, it is used for welding low-load components such as fuel tanks, lubricant conduits, and liquid containers, particularly suitable for deep-drawn structural welding operations. Its excellent formability ensures that welded components meet usage requirements. In the electronics and electrical appliances field, the 4104 aluminum brazing sheet is used for brazing precision components like heat sinks and electronic devices. Its precise welding results and stable performance ensure the heat dissipation efficiency and operational stability of electronic equipment, supporting the high-quality production of electronic and electrical products.

V. Future Development Outlook

With continuous advancements in industrial technology, the performance requirements for welding materials across various industries will continue to rise, presenting new opportunities and challenges for the 4104 aluminum brazing sheet. In the future, on one hand, by continuously optimizing chemical composition ratios and production processes, it is expected to further enhance the performance of the 4104 aluminum brazing sheet, such as improving its high-temperature strength, corrosion resistance, and welding precision to adapt to more complex and demanding application scenarios. On the other hand, with the deepening of green manufacturing concepts, developing more environmentally friendly and energy-efficient production processes for the 4104 aluminum brazing sheet, reducing energy consumption and environmental pollution during production, will become an important development direction. Driven by technological innovation, it is believed that the 4104 aluminum brazing sheet will find applications in more emerging fields, contributing significantly to the sustained development of the industrial sector.