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Selection criteria for marine grade aluminum alloy plate

Edit:Mingtai Date: 2019-05-24 14:29
Marine grade aluminum alloy is one of the new categories of aluminum alloy products, and it is also an important direction for the transformation and upgrading of many aluminum processing companies in China. Marine grade aluminum panels are used in marine vessels and the like, and thus have more stringent technical requirements and functional specifications than other common aluminum alloy products.
The standard for marine grade aluminum can be divided into four areas.
1. With high specific strength and specific modulus, the structural strength and scale of the vessel are closely related to the yield strength and elastic modulus of the data. Since the elastic modulus and density of the aluminum alloy are generally the same, the addition of alloying elements has little effect. Therefore, progressing the yield strength within a certain range is effective for mitigating the ship's structure. High-strength aluminum alloys are often difficult to have excellent corrosion resistance and weldability together. Therefore, marine grade aluminum alloys are usually medium strength, corrosion resistant weldable alloys.
2. Excellent welding function. The first choice for ships is the active argon arc welding method. The outstanding weldability means that the aluminum alloy has a small tendency to form cracks during welding, which means that the aluminum alloy has excellent welding crack resistance. The lost welding function cannot be recovered by reheating the heat treatment under shipbuilding conditions.
3, excellent corrosion resistance, the use of ships in the harsh seawater medium and marine environment, therefore, corrosion resistance is one of the primary symbols of marine alloys.
4, aluminum alloy has outstanding cold and hot forming function, because the ship is processed by cold processing and hot processing, so the marine aluminum alloy must be easy to process, no crack defects, and still be satisfactory after processing. Corrosion resistance requirements.
Marine grade aluminum alloy materials are more stringent, and now more choices are 5083, 5086, 5454, 5754, 6061 and other aluminum alloy products. In practice, the advantages of marine grade aluminum alloys are significant. The first is the small specific gravity, which can reduce the weight of the ship, save energy and add load; secondly, it is good in corrosion resistance, reducing oiling and other expenses, and prolonging the service life; third is welding and processing formability, which is conducive to post-processing; Waste is easy to recycle, can be recycled, together, not incinerated, and safe in case of fire.
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