KR (Korean Register) is an international classification society responsible for the inspection and certification of ships and marine equipment.
KR high-strength hull structure steel is divided into strength grades according to its minimum yield strength, and each strength grade is divided into A, D, E, and F 4 grades according to its impact toughness.
A, D, E, and F respectively represent the impact toughness that they can achieve at 0°, -20°, -40°, and -60° respectively.
KR A47 D47 E47 F47 ship plate flaw detection requirements:
first detection, second detection, third detection.
KR A47 D47 E47 F47 shipbuilding steel plate density:
7.85/m3.
KR A47 D47 E47 F47 ship plate weight adjustment formula:
thickness * width * length * density.
KR A47 D47 E47 F47 marine grade steel plate regular size:
8-80mm*2000-2500mm*8000-10000mm
KR Grade A47 Shipbuilding Steel Plate Chemical Composition and Mechanical Property
| C max | Si max | Mn | P max | S max | N max. |
|
0.21 |
0.55 | 1.70 |
0.030 |
0.030 |
0.020 |
| Yield Strength (MPa) min. | Tensile Strength (MPa) | Elongation min. % |
| 460 | 570-720 | 17 |
KR Grade D47 Shipbuilding Steel Plate Chemical Composition and Mechanical Property
| C max | Si max | Mn | P max | S max | N max. |
|
0.20 |
0.55 | 1.70 |
0.025 |
0.025 |
0.020 |
| Yield Strength (MPa) min. | Tensile Strength (MPa) | Elongation min. % |
| 460 | 570-720 | 17 |
KR Grade E47 Shipbuilding Steel Plate Chemical Composition and Mechanical Property
| C max | Si max | Mn | P max | S max | N max. |
|
0.20 |
0.55 | 1.70 |
0.025 |
0.025 |
0.020 |
| Yield Strength (MPa) min. | Tensile Strength (MPa) | Elongation min. % |
| 460 | 570-720 | 17 |
KR Grade F47 Shipbuilding Steel Plate Chemical Composition and Mechanical Property
| C max | Si max | Mn | P max | S max | N max. |
|
0.18 |
0.55 | 1.60 |
0.020 |
0.020 |
0.020 |
| Yield Strength (MPa) min. | Tensile Strength (MPa) | Elongation min. % |
| 460 | 570-720 | 17 |
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