Marine Grade Aluminum 5383 5052
The high toughness, corrosion resistance and weldability of aluminum alloys provide a good choice for building ships with strict weight requirements. Due to the lower processing cost of aluminum, it is more economical to use aluminum to build ships.
Coupled with the outstanding physical properties of aluminum alloy, it is very economical to use aluminum alloy ships. 5086, 5083 and 5052 aluminum alloys are recognized marine grade aluminum sheets. 5052 aluminum alloy is one of the 5xxx series aluminum alloys with a Mg content of 2.2%-2.8%. It has the characteristics of light weight, medium strength, good corrosion resistance and weldability, and easy processing and forming.
Marine grade aluminum 5052 has a higher magnesium content than other alloys, so it has good anti-rust properties. This is also an important reason why 5052 marine aluminum plate is used in ship hulls. Magnesium has high strength, anti-rust function and corrosion resistance, and can well cope with the corrosion of sea water, fresh water, etc.
The excellent corrosion resistance of Al-Mg alloy can only be displayed when the β phase is evenly distributed along the grains and grain boundaries, and the distribution state is closely related to the Mg content. The stability of the 5052 alloy with Mg≤3.0% is extremely high.
No matter it is in the annealed or cold working state (O, H), it will not form an intergranular β-phase network film at room temperature or stabilization (sensitization treatment) temperature (67°C~177°C) for a long time, which is very resistant to stress corrosion cracking ( SCC) and exfoliation corrosion (EFC).
Currently, three alloys, 5083, 5086, and 5383, are mainly used in ship hull structures. Their corrosion resistance, mechanical properties, and welding properties are all good. There are many types of fishing boats. Common ones include rubber boats and assault boats, but these have a weak point and are prone to breakage. Choosing a fishing boat made of aluminum alloy can avoid such problems.
AA5383 aluminum alloy has increased corrosion resistance and impact strength increased by 10%. These improvements have the potential to significantly reduce the mass of welded vessels and increase the yield point of the welding location by 15%. The characteristics of 5383 alloy such as processing, forming, folding, shearing, and welding are almost the same as those of 5083, which makes 5383 alloy more advantageous in building larger and higher-speed ships.
