Can solder be used on copper-aluminum composite sheets?
Release time:
2026-01-16
Welding copper-aluminum composite sheets with ordinary solder really isn't very effective—but don't worry, there's a more reliable solution! Here's the bottom line: I recommend using brazing—it’s the perfect way to overcome the challenges of welding copper and aluminum together.
Why won’t ordinary solder work?
Common solder (tin-based) has a low melting point (about 232℃), making it easy to use when soldering copper and aluminum:
Insufficient strength: The connector is prone to breakage and has poor conductivity.
Not resistant to high temperatures: Radiators and other high-temperature environments will fail.
Process limitation: It can only be used for welding small-specification wires.
Better solution: Brazing process
Brazing achieves metallurgical bonding through an intermediate medium (the braze alloy), offering distinct advantages:
Well-formed: The joint exhibits strong tensile and shear resistance.
Corrosion-resistant: Suitable for long-term use in harsh environments
Excellent conductivity: Meets electrical connection requirements
Product Recommendation
Shanghai Songfeng Mechanical & Electrical Copper-Aluminum Welding Wire: Professional soldering material, ideal for welding copper-aluminum composite sheets.
Welding Wire Weiouding 51 + Flux 51-F: Low-temperature welding solution, ideal for small workpieces.
Precautions
Surface Treatment: Thorough cleaning is required before welding to prevent oxidation from affecting the bond.
Process Control: Brazing requires strict control of temperature and time.
Keywords:
Can solder be used on copper-aluminum composite sheets?
More Events
Nantong Taidao New Energy Technology Co., Ltd.
Service Hotline
No. 81, Pingdong Avenue, Pingchao Town, Tongzhou District, Nantong City, Jiangsu Province, China.
Follow us
Leave us a message