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Marine aluminum plate material selection Date : Thursday, May 23, 2019 Adress : High-tech Zone, Zhengzhou City, Henan Province, China Country : Zhengzhou, China Category : Others Website : Fax : No Fax Email : Phone : 13598016506 FullName : menghao zhang
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Marine board is one of the emerging fields of aluminum alloy products, and it is also the key direction for the transformation and upgrading of many aluminum processing enterprises in China. Since marine aluminum sheets are used in fields such as Marine Grade Aluminum, they have more stringent process requirements and performance standards than other common aluminum alloy products.

The principle of selecting aluminum alloy for ships has the following four points:

1. High specific strength and specific modulus. The structural strength and size of the ship are closely related to the yield strength and elastic modulus of the material. Since the elastic modulus and density of the aluminum alloy are generally the same, the addition of alloying elements has little effect, so the yield strength is reduced within a certain range. The ship structure is powerful. High-strength aluminum alloys are often difficult to have both excellent corrosion resistance and weldability. Therefore, marine aluminum alloys are generally medium strength, corrosion resistant weldable alloys.

2, excellent welding performance. At present, the main method used in the ship is the automatic argon arc welding method. Good weldability means that the tendency of the aluminum alloy to form cracks during welding is small, that is, the aluminum alloy has good welding crack resistance. The lost weldability cannot be restored by reheating under shipbuilding conditions.

3. Excellent corrosion resistance. The ship's structure is used in many harsh seawater media and in the marine environment. Therefore, corrosion resistance is one of the main signs of marine alloys.

4. Aluminum alloy has good cold and hot forming properties. Because the ship is manufactured by cold processing and hot processing, the marine aluminum alloy must be easy to process, no crack defects, and can still meet the strength and corrosion requirements after processing.

The selection of marine aluminum plates is more stringent. At present, most of the aluminum alloy products such as 5083, 5086, 5454, 5754 and 6061 are used. In practical applications, the advantages of marine aluminum alloys are very obvious. The first is the small specific gravity, which can reduce the weight of the ship, save energy and increase the load; secondly, it has good corrosion resistance, reduces oiling and other expenses, and extends the service life; thirdly, it has good welding and processing performance, which is good for post-processing; The waste is easy to recycle and can be recycled. At the same time, it does not burn and is safe in case of fire.

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