Magnesium content is high, its strength is low, plasticity is high, and corrosion resistance is good

05 is Al-Mg rust-proof aluminum alloy and cannot be strengthened by heat treatment. This alloy has a higher magnesium content and lower strength, 

similar to 03 alloy. The alloy can be cold deformed, but its plasticity is reduced. The plasticity in the annealed state is high, and 

the plasticity in the semi-cold work hardening state is acceptable. The corrosion resistance of the alloy is acceptable, and it is suitable for spot welding, 

atomic hydrogen welding, gas welding, and argon arc welding. Its machinability is very poor in the annealed state, but is good in the semi-cold work hardening state.

05 alloy is usually used to manufacture pipes, welded fuel tanks and other liquid containers, and other parts that require high plasticity, good corrosion resistance, 

and medium load; wire rods are used as welding rods and rivets, and the rivets need to be anodized. Abroad, similar alloys (such as 5456) are used to make armor 

plates and structural parts. Storage tanks, pressure vessels, and marine supplies parts, etc.