NK is a ship plate certified by Japan Classification Society. KA ship plate is suitable for manufacturing ship hull structures, docks, oil production platforms, ocean pipelines, coastal power plants, dock facilities and other structural parts in ocean, coastal and inland navigation areas.
General strength ship plate: A, B, D, E.
High-strength ship plates: AH32, AH36, AH40, DH32, DH36, DH40, EH32, EH36, EH40, FH36
ultra-high-strength ship plates:DH460, EH460, EH550, EH690,NK Grade A56 D56 E56 F56 etc.
NK Grade A56 D56 E56 F56 Marine Grade Steel Plate Size:
Thickness: 3-80mm, width 1500-4000mm, length 4000-19000mm.
Certified by the world's nine major classification societies (CCS, ABS, VL, LR, BV, NK, KR, RINA, RS).

KR Grade A56 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. % |
| 550 | 670-830 | 16 |
KR Grade D56 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. % |
| 550 | 670-830 | 16 |

KR Grade E56 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. % |
| 550 | 670-830 | 16 |
KR Grade F56 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. % |
| 550 | 670-830 | 16 |
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