In shipbuilding and marine industry, Aluminum keeps the center of gravity of the craft even further down and increases the balance of the craft, thus providing more usage volume. Poles of small boats and yachtsare made of aluminum. Aluminum alloys used in shipbuilding are known as sea-type aluminum and areclassified, inspected and documented in class rules such as steel material.
The low density of aluminum, combined with its high strength, rigidity and corrosion resistance allows marine vessel designers to achieve weight savings of 15 to 20 percent over steel or composite designs. All-aluminum vessels such as wave-piercing catamarans and hydrofoils are revolutionizing transportation across open-water routes. They can reduce travel time by half or more, when compared with the transport times required by traditional steel-intensive craft.