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.
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ABS |
|||||
Grade |
T: 8-600MM |
ABS A |
ABS B |
ABS D |
ABS E |
Chemical Composition % ≤ |
C |
0.21 |
0.21 |
0.21 |
0.18 |
Mn(≥) |
2.5*C |
0.80 |
0.60 |
0.70 |
|
P |
0.035 |
0.035 |
0.035 |
0.035 |
|
S |
0.035 |
0.035 |
0.035 |
0.035 |
|
Si |
0.50 |
0.35 |
0.10-0.35 |
0.10-0.35 |
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ABS |
|||||
Grade |
T: 8-600MM |
ABS A |
ABS B |
ABS D |
ABS E |
Mechanical Property ≥ |
Yield Strength(Mpa) |
235 |
235 |
235 |
235 |
Tensile Strength(Mpa) |
400-520 |
400-520 |
400-520 |
400-520 |
|
Impacting Test temperature(℃) |
 |
20 |
0 |
-20 |
-40 |
Mark |
 |
AB/A |
AB/B |
AB/D |
AB/E |
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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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