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2024-01-12 16:11
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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 | Â | 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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