（2） Industrial aluminum for shipbuilding: four advantages:

1. Excellent welding performance:

Compared with riveting, welding has more obvious advantages, because in shipbuilding, the performance lost due to welding can not be recovered by RE heat treatment, while the industrial aluminum profile has good welding crack resistance, and the performance of welded joints after welding is not significantly different, so it is very conducive to the use of shipbuilding welding.

2. Excellent corrosion resistance:

When aluminum contacts with air, it will form a layer of dense and solid alumina film on its surface, which can well resist the corrosion of various elements in seawater. Combined with anodic oxidation technology, industrial aluminum profiles can maintain a very stable form in seawater.

3. Low density, light weight:

The density of aluminum is only one third of that of iron. On the premise of the same hull size, the industrial aluminum profile ship will bring lighter weight, which is greatly conducive to the improvement of ship speed per hour and fuel economy, so as to obtain longer mileage under the same fuel volume.

4. Good cold and hot forming properties

During the construction of warships, cold processing (such as folding, curling, roll bending, stamping, etc.) and hot processing (such as hot bending, pyrotechnics correction, etc.) are required. Therefore, it is required that the marine aluminum alloy is easy to be processed and formed, without cracks and other defects during processing, and can still meet the performance requirements of strength and corrosion resistance after processing.

（3） Industrial aluminum for shipbuilding applications:

① Aircraft carrier

② , speedboats and speedboats

③ Working boat

④ LNG cargo ship

（4） Industrial aluminum for shipbuilding - advantages in application:

Aluminum alloy has the characteristics of small specific gravity and elastic modulus, corrosion resistance, weldability, easy processing, non-magnetic and good low-temperature performance, etc

1、 Small proportion

Because of its small proportion, it can reduce ship weight, reduce engine capacity, increase speed, reduce fuel consumption,

2、 Fuel saving

Fuel saving: it can improve the length width ratio of the ship and increase the stability

3、 Easy to operate

Make the ship easy to handle: it can also increase the carrying capacity and make extra profits.

4、 Corrosion resistance

-Due to its good corrosion resistance, it can reduce the maintenance cost of oiling and extend the service life (usually more than 20 years).

5、 Good formability

-It has good formability and is easy to be processed in various forms, such as cutting, stamping, cold bending, forming and cutting. It is suitable for the streamline of hull. It can extrude large-scale and thin-walled sections, reduce the number of welding seams and rationalize and lightweight the hull structure.

6、 Weldability

-The welding performance is good and can be easily welded.

7、 Small elastic modulus

-The elastic modulus is small, the ability of absorbing impact stress is large, and the safety is great.

8、 Waste is easy to recycle

-Aluminum scrap is easy to recycle and can be recycled.

9、 No low temperature brittleness