marine grade aluminum plate deformation according to the different manufacturing process can be divided into aluminum plate and the casting aluminum plate, due to Marine aluminum plate on the strength, corrosion resistance, weldability, etc have special requirements, so the Marine aluminum plate with aluminum – magnesium alloy, aluminum – magnesium – silicon alloy and aluminum and zinc, magnesium alloy, including 5 series aluminum – magnesium alloy in the most widely used on ships, so, 5 series Marine aluminum plate what are the characteristics?