Marine CCS AH36 Marine Steel Plate For Shipbuilding

 

The quality standards of shipbuilding steel plates have a profound impact on the service life of ships:

 

In terms of chemical composition

 

The influence of carbon content
The carbon content in shipbuilding steel plates needs to be controlled within a certain range. For example, the carbon content of common shipbuilding steel plates usually does not exceed 0.21%. Excessive carbon content will deteriorate the welding performance of the steel, and cracks are likely to occur in the welded parts during the use process, thus affecting the integrity of the ship structure. At the same time, excessive carbon content will reduce the toughness of the steel, making the ship more prone to fatigue cracks when it is subjected to alternating stresses (such as stresses caused by waves) for a long time, accelerating the damage of the ship structure and shortening the service life of the ship.

 

The role of alloy elements
Manganese element: Manganese is an important alloy element in shipbuilding steel plates, and its content is usually around 0.70% - 1.60%. Manganese can refine the grain and improve the strength and toughness of the steel. A suitable manganese content enables the ship to better resist various stresses during the use process, reducing the possibility of structural deformation and damage, thereby extending the service life of the ship.
Silicon element: The content of silicon is generally between 0.10% and 0.50%. An appropriate amount of silicon can increase the strength of the steel, but excessive silicon will reduce the welding performance and toughness of the steel. If the silicon content exceeds the standard range, cracks may occur in the welded parts of the ship structure during long - term use, affecting the overall service life of the ship.
Other alloy elements: Elements such as chromium and nickel are added according to the specific grade and performance requirements of the shipbuilding steel plate. These elements can improve the corrosion resistance, low - temperature toughness and other properties of the steel. For example, in the marine environment, shipbuilding steel plates containing chromium and nickel can better resist the corrosion of seawater, slow down the corrosion rate of the steel, and keep the ship structure with good strength and integrity, thereby extending the service life of the ship.

 

Item	steel plate
Width	1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2200mm, 2500mm, etc
Length	2000mm, 2438mm, 3000mm, 6000mm, 8000mm, 10000mm, 12000mm, etc
Surface	Black painted, PE coated, Galvanized, colour coated, etc

 

 

 

 

In terms of mechanical properties

 

The significance of strength indicators
Yield strength: Different grades of shipbuilding steel plates have different yield strength requirements. For example, the yield strength of AH32 shipbuilding steel plate is not less than 315MPa, and the yield strength of DH36 shipbuilding steel plate is not less than 355MPa. The yield strength reflects the stress that the steel can withstand when plastic deformation begins. If the yield strength of the shipbuilding steel plate is lower than the standard requirement, the ship structure may produce excessive plastic deformation due to the load (such as the weight of the cargo, the impact force of the waves, etc.) during normal use, resulting in structural deformation and damage, thereby shortening the service life of the ship.
Tensile strength: Tensile strength reflects the ability of the steel to resist fracture during the stretching process. Generally, the tensile strength of shipbuilding steel plates is in the range of 400 - 630MPa. If the tensile strength is insufficient, the ship plate is prone to fracture when the ship is subjected to a large tensile force (such as in severe sea conditions), which seriously affects the safety and service life of the ship.

 

 

 

 

 

 

 

 

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