The common strength shipbuilding structure steel is divided into four grades A, B, C, and D. The yield strength of these four grades of steel (not less than 235N/mm^2) and the tensile strength (400~520N/mm^2) are the same. , but the impact energy at different temperatures is different.

High-strength hull structure steels are classified according to their minimum yield strength, and each strength grade is classified into A, D, E, and F4 according to their impact toughness.

 

 

 

 

 

 

The yield strength of A32, D32, e32 and F32 is not less than 315N/mm^2, and the tensile strength is 440~570N/mm^2. A, D, E and F respectively indicate that they can be at 0° and -20 ° respectively. Impact toughness that can be achieved at -40 °, -60 °;

The yield strength of A36, D36, E36 and F36 is not less than 355N/mm^2, and the tensile strength is 490~620N/mm^2. A, D, E and F respectively indicate that they can be at 0° and -20 ° respectively. Impact toughness that can be achieved at -40 °, -60 °;

The yield strength of A40, D40, E40 and F40 is not less than 390N/mm^2, and the tensile strength is 510~660N/mm^2. A, D, E and F respectively indicate that they can be at 0° and -20 ° respectively. Impact toughness that can be achieved at -40 °, -60 °.

 

 

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