1. Material properties
AH40 AH36
Yield strength 390MPa 355MPa
Tensile strength 510-660MPa 490-630MPa
Elongation Not less than 20% Not less than 21%
Chemical composition Carbon C ≤0.18%, Manganese Mn 0.9-1.6%, Silicon Si ≤0.50%, Sulfur S ≤0.035%, Phosphorus P ≤0.035% (Specific content may vary slightly due to manufacturers and specifications) Similar, but the specific values may vary slightly to meet different strength requirements
Z-direction performance Requires to increase the thickness direction of the steel plate, and after adding the Z direction, it is AH40-Z35 May not require or require lower
2. Applications
AH40: Due to its high yield strength and tensile strength, AH40 is mainly used to build large ships and offshore oil drilling platforms with higher strength requirements. These structures need to withstand greater design loads and stress concentration, so they have higher requirements for the material properties of steel.
AH36: AH36 is widely used in the construction of various ships, including cargo ships, tankers, passenger ships, etc. It can meet the general ship's demand for steel strength, and has good weldability and processing performance.
III. Implementation standards
AH40: Implement GB/T712-2011 standard, which specifies the grade, chemical composition, mechanical properties and other requirements of structural steel for ships and marine engineering. As one of the high-strength steels, AH40's various performance indicators must comply with the provisions of this standard.
AH36: It also implements GB/T712-2011 standard, but compared with AH40, its strength level is lower, so the requirements in terms of chemical composition and mechanical properties are relatively lower.
IV. Summary
There are certain differences between AH40 and AH36 in terms of material properties, application occasions and implementation standards. Due to its higher strength level, AH40 is more suitable for the construction of large ships and offshore structures with higher strength requirements; while AH36 is widely used in the construction of various ships and can meet the general ship's demand for steel strength.
