Ah36 Dh36 Eh36 Marine Alloy Shipbuilding Steel Plate

Toughness

All three grades have good toughness properties. The Charpy V - notch impact test is commonly used to measure their toughness. They are designed to withstand impact loads such as those from waves, collisions with floating objects, and other sudden forces in the marine environment. The impact energy values are specified according to different standards and temperature conditions to ensure the steel can perform well in various climates and operating scenarios.

Ductility

These steel plates have sufficient ductility, with an elongation percentage that meets the requirements of shipbuilding. The elongation values help in the forming and shaping processes during construction and also indicate the material's ability to deform plastically before failure, which is beneficial for absorbing energy during impacts and other dynamic situations.

 

 

 

Chemical Composition

Alloying Elements

Manganese (Mn): Manganese content is an important factor in enhancing the strength and hardenability of these steels. The Mn content in Ah36, Dh36, and Eh36 is usually in the range of 0.9 - 1.6%. It also acts as a deoxidizer during the steel - making process.

Silicon (Si): Silicon is present in small amounts, typically around 0.1 - 0.5%. It helps in the deoxidation process and also contributes to the strength of the steel.

Nickel (Ni), Chromium (Cr), and Molybdenum (Mo): In Eh36, there may be small amounts of nickel, chromium, and molybdenum. Nickel can improve corrosion resistance and toughness, chromium can enhance hardness and corrosion resistance, and molybdenum can improve the strength and high - temperature performance of the steel.

Impurity Control

The content of harmful impurities such as sulfur (S) and phosphorus (P) is carefully controlled. The sulfur content is usually limited to less than 0.035% and the phosphorus content to less than 0.035% in these steels. High levels of these impurities can lead to reduced ductility, toughness, and weldability.

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