AH36 DH36 EH36 Difference

AH36, DH36, and EH36 are grades of steel commonly used in shipbuilding. These grades are defined by their minimum yield strength, which is the amount of stress required to permanently deform the steel.

AH36 is a high-strength, low-alloy structural steel that is commonly used in the shipbuilding industry. It has a minimum yield strength of 355 MPa and a tensile strength of 490-620 MPa. AH36 is considered a suitable material for shipbuilding due to its excellent strength and toughness properties, which make it resistant to cracking and deformation under high loads.

DH36 is also a high-strength, low-alloy structural steel used in shipbuilding. It has a minimum yield strength of 355 MPa and a tensile strength of 490-620 MPa. DH36 is distinguished from AH36 by its impact toughness, which is tested at -20°C. DH36 is considered to have good impact toughness, which makes it suitable for use in environments with low temperatures.

EH36 is another high-strength, low-alloy structural steel used in shipbuilding. It has a minimum yield strength of 355 MPa and a tensile strength of 490-620 MPa. EH36 is distinguished from AH36 and DH36 by its chemical composition, which includes more alloying elements such as nickel, chromium, and molybdenum. These elements increase the steel's strength and resistance to corrosion, making it suitable for use in harsh marine environments.

In summary, the main difference between AH36, DH36, and EH36 is their specific properties. AH36 is high-strength steel with excellent toughness properties, while DH36 is similar to AH36 but with improved impact toughness at low temperatures. EH36 has a higher alloy content and better corrosion resistance than AH36 and DH36, making it suitable for use in harsh marine environments.

It's important to note that the choice of steel grade depends on the specific requirements of the shipbuilding project, such as the vessel's size, intended use, and operating conditions. Therefore, it's essential to consult with a qualified engineer or material specialist to determine the most suitable steel grade for a particular application.