The main materials of Marine steel plates are carbon steel and alloy steel.

First, carbon steel ship plate

Carbon steel mainly refers to ordinary steel with carbon content between 0.05-2.0%. Carbon steel ship plate is widely used in various types of ships, which is characterized by high strength, good toughness, good weldability and low cost. In addition, the reliability of carbon steel materials is high and can withstand strong hot and cold deformation, which is necessary for Marine steel plates.

The main disadvantage of carbon steel ship plates is that they are susceptible to corrosion by seawater and air, so special anti-corrosion treatment is required, including painting and the use of anti-rust coatings. At the same time, the service life of the carbon steel ship plate is also relatively short, and it needs to be replaced frequently.

Second, alloy steel ship plate

Compared with carbon steel, alloy steel ship plate has lower carbon content and adds a certain proportion of alloying elements, such as manganese, silicon, chromium, tungsten, molybdenum, etc., to increase the strength and corrosion resistance of steel. Alloy steel ship plates are more resistant to corrosion and last longer than carbon steel ship plates.

Alloy steel ship plate has the following characteristics:

1. High strength: The addition of alloying elements can improve the strength of steel and enhance the carrying capacity.

2. Good corrosion resistance: the alloy elements such as chromium not only increase the strength of the steel, but also form a dense chromium oxide film, which can prevent further corrosion.

3. Good cold working performance: compared with ordinary steel, alloy steel can better withstand strong hot and cold deformation, and it is not easy to produce surface cracking, fracture and other phenomena.

The choice of Marine steel plate material depends on many factors such as the ship's use environment, transportation volume and economic cost. Factors such as physical and chemical properties, corrosion resistance, cost and processing difficulty need to be considered when selecting materials.