In terms of composition：
Aluminum-silicon welding wire contains aluminum, silicon, and may also contain a small amount of iron and copper; aluminum-magnesium welding wire contains aluminum and magnesium, and may also contain elements such as calcium, cerium, and thorium.
In terms of use：
Aluminum-silicon welding wire is widely used in aluminum alloy welding with good welding performance; aluminum-magnesium welding wire is suitable for welding of non-melting metal structural steel with strong crack resistance.
In terms of process requirements：
Aluminum-silicon welding wire needs to maintain a low welding temperature and control the amount of silicon precipitation; aluminum-magnesium welding wire needs to control the magnesium burnout rate to ensure the cleanliness of the weld.
Differences in application scenarios：
Aluminum-magnesium welding wire is suitable for applications that require high strength and good corrosion resistance, such as automotive parts, chemical storage containers, and cryogenic pressure vessels. Aluminum-silicon welding wire is widely used in automotive parts (such as radiators, intercoolers), locomotives, chemicals, food, sports equipment, molds, furniture, containers, refrigerated containers, and other industries.