The 5 series aluminum pipe is the Al-Mg series alloy. It is the most widely used antirust aluminum. This alloy has high strength, especially the fatigue strength: high plasticity and corrosion resistance, can not be strengthened by heat treatment. The plasticity is good in semi-cold work hardening, but low in cold work hardening. Good corrosion resistance, good weldability, poor machinability, and polishable.
It is mainly used in occasions requiring high plasticity and good weldability. Low load parts working in liquid or gas medium, such as oil tank, gasoline or lubricating oil pipe. Various liquid containers and other small load parts made by deep drawing, such as wire rods are used to make rivets. It is also commonly used for sheet metal parts of traffic vehicles and ships, instruments, street lamp brackets and rivets, hardware products, electrical enclosures, etc.