The Features of Marine Aluminum Sheet
The ship plate material was originally mainly steel. With the advancement of technology, aluminum alloy plates have been gradually used in yachts, ships and other hull parts. In recent years, many countries have successfully built all-aluminum ships. With the development of aluminum alloy technology, different parts like the hull, deck, piston and pump can be made of it.
The marine aluminum sheets have special requirements for strength, corrosion resistance, weldability, etc., so marine aluminum sheets are mostly made of aluminum-magnesium alloys, aluminum-magnesium-silicon alloys and aluminum-zinc-magnesium alloys, of which 5xxx aluminum is more often used, especially Al 5086, 5083 and 5754. What are their advantages?
1. Strong corrosion resistance. The ship needs to be immersed in water for a long time, especially seawater with high salinity and high corrosion. The aluminum alloy surface can produce a natural oxide film to resist external corrosion, and the anodized aluminum alloy can maintain a very stable state in seawater.
2. Excellent welding performance. Welding has more obvious advantages than riveting, because the performance lost due to welding cannot be recovered by re-heat treatment in shipbuilding, while industrial aluminum plates have good welding crack resistance.
3. Low density and lightness. The density of aluminum is only one-third of that of iron. Under the premise of the same hull size, the industrial aluminum hull brings lighter weight, which is greatly beneficial to the higher speed improvement of the ship and the fuel economy.
Marine yachts need to use 5083 aluminum plates, inland river ships can use 5456 aluminum plates and park boats generally use ASTM 5052 aluminum. These three alloys have relatively superior mechanical properties, corrosion resistance and welding properties, and are mainly used in the keel plate, curved outer plate and upper outer plate of the hull structure. Welcome to leave message to inquire what you need.
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