Aluminum Steel Sheet in Shipbuilding
With the continuous innovation of the shipbuilding industry in the last century, the trend of large-scale and high-speed ships has become increasingly obvious. It is difficult for traditional single materials to take into account both lightweight and high-strength requirements. Against this background, aluminum steel sheet came into being in the middle of the 20th century.
Effective connection of dissimilar metals
In shipbuilding, the connection between aluminum alloy superstructure and steel deck has always been a difficult problem. Due to the low solubility between aluminum and steel, multiple intermetallic brittle phases will be formed when they are fused together, and traditional melting welding cannot be used for connection.
The emergence of aluminum-steel composite plates has perfectly solved this problem. Aluminum-steel composite plates made by explosive composite and other technologies can form a strong bond between aluminum plates and steel plates, providing a reliable transition joint for the connection between the ship's superstructure aluminum structure and the steel hull.
This connection method not only improves the watertightness and corrosion resistance of the aluminum alloy and steel joint, but also simplifies the construction process, gradually replacing traditional connection methods such as riveting.
Reduce the weight of ships and increase the speed
The density of aluminum is relatively small, about one-third of that of steel. The application of aluminum-steel composite plates in ship construction can significantly reduce the overall weight of the ship. Compared with all-steel ships, the weight of ships using aluminum-steel composite plates can be reduced by 15% - 20%. The reduction in weight reduces the power required for ships to sail, thereby reducing the single engine capacity of the engine and increasing the sailing speed.
Enhance the corrosion resistance of ships
Ships sail in a humid marine environment for a long time and face serious corrosion problems. Aluminum can quickly form a dense oxide film in the air. This oxide film has good corrosion resistance and can effectively prevent aluminum from further corrosion.
When aluminum clad steel sheets are used in ship construction, aluminum plates as the outer layer can provide additional corrosion protection for ships. Compared with all-steel ships, ships using aluminum-steel composite plates perform better in corrosion resistance, greatly extending the service life of ships and reducing maintenance costs.
Aluminum clad steel sheet Specification
The total thickness of aluminum-steel composite plates is generally between 8mm and 300mm. Among them, the thickness of the marine grade aluminum sheet layer is commonly 8-50mm. For example, in some ship superstructure applications, the thickness of the aluminum alloy may be 10-20mm; the thickness of the steel layer is generally 10-50mm.
In terms of width, the common width of aluminum-steel composite plates is between 1500mm and 4020mm, which can be selected according to the size requirements of different parts during ship construction. The length is generally 3000mm to 18000mm. Some large ship construction may require longer composite plates to reduce splicing welds and improve the integrity and strength of the structure. Welcome to inquire aluminium cladding sheet price from us directly.
Original Source:https://www.marinealu.com/a/aluminum-steel-sheet-in-shipbuilding.html
Tags: marine grade aluminum sheet ,