In recent years, with the rapid development of the shipbuilding industry at home and abroad, reducing the weight of the hull, increasing the speed of the ship, and seeking to replace aluminum alloy materials for steel components have become important tasks facing the aluminum processing industry and the shipbuilding industry.
In order to reduce weight, improve anti-corrosion performance and increase ship speed, the amount of marine aluminum alloy thick plates for passenger ships and ships in the shipbuilding industry is gradually increasing. However, the ship's working environment is very harsh, which requires that the structural material has certain tensile strength, yield strength, elongation and impact resistance. In addition, considering the structure and use environment of the hull, the hull material is also required to have good welding Performance and corrosion resistance.
Marine aluminum alloy thick plates can effectively solve the problem that the existing plates cannot fully meet the high corrosion resistance requirements of ships under certain harsh working environments.
Marine aluminium alloy thick plate, expressed as a percentage by weight, the marine aluminum alloy thick plate is made of raw materials Si 0.15 ~ 0.25%, Fe 0.2 ~ 0.35%, Cu 0.03 ~ 0.07%, Mn 0.45 ~ 0.6%, Mg 4.5 ~ 4.9 %, Cr 0.1 ~ 0.2%, Zn 0.1%, Ti 0.015 ~ 0.03% and the balance is made of Al.



Marine aluminum alloy thick plate (its tensile strength is more than 290MPa, yield strength is less than 125MPa, elongation is less than 10%), not only can meet the mechanical properties of marine aluminum plates, but also can greatly improve the corrosion resistance of aluminum alloy plates. The intergranular corrosion depth of the aluminum alloy plate of the product is below 40 μm, which can meet the high corrosion resistance requirements of the aluminum alloy thick plate for marine use in harsh environments.