Shipbuilding Steel Plate Mechanical Properties
Grade | Thickness
(mm) |
Yield Point
(Mpa) ≥ |
Tensile Strength
(Mpa) |
Elongation
(%)≥ |
V-impact Test | Cold Bend Test | |||
Temperature
(℃) |
Average AKV A kv /J |
b=2a 180° |
b=5a 120° |
||||||
lengthways | crosswise | ||||||||
≥ | |||||||||
A | ≤50 | 235 | 400~490 | 22 | — | — | — | d=2a | — |
B | 0 | 27 | 20 | — | d=3a | ||||
D | -10 | ||||||||
E | -40 | ||||||||
A32 | ≤50 | 315 | 440~590 | 22 | 0 | 31 | 22 | — | d=3a |
D32 | -20 | ||||||||
E32 | -40 | ||||||||
A36 | ≤50 | 355 | 490~620 | 21 | 0 | 34 | 24 | — | d=3a |
D36 | -20 | ||||||||
E36 | -40 |
Shipbuilding Steel Plate Standards from Different Countries
Shipbuilding steel plates are produced under the approval of production methods of classification societies in different countries refers to offshore and marine steels.
- ABS (American Bureau of Shipping)
- BV (Bureau Veritas)
- CCS (China Classification Society)
- DNV (Det Norske Veritas)
- GL (Germanischer Lloyd)
- HR (Hellenic Register of Shipping)
- KR (Korean Register of Shipping)
- LR (Lloyd’s Register of Shipping)
- NK (Nippon Kaiji Kyokai)
- RINA (Registro Italiano Navale)
- RS (India Register of Shipping)
Shipbuilding Steel Plate Grades: A, B, D, E, AH32/36/40, DH32/36/40, EH32/36/40
- According to its yield strength, shipbuilding plate of can be divided into below grades:
- Grade A steel is the impact force subjected to normal temperature (20 ° C).
- Grade B steel impact force at 0 °C.
- Grade D steel impact force at -20 °C.
- Grade E steel impact force at -40 °C.
- High-strength shipbuilding steel plate can be further divided into: AH32, DH32, EH32; AH36, DH36, EH36 and AH40, DH40, EH40.
- The general grades A, B, D, and E are distinguished according to the impact temperature of the steel. The impact values of all grades of steel are the same.
- High-intensity hull structure steel preheating requirements: For all AH, DH, EH plate thickness greater than 30mm angle, butt joints, shall be preheating to 120 ~ 150 °C before welding.
- For thickness of the plate ≤ 30mm, the ambient temperature is below 5 ° C, preheated to 75 ° C; Ambient temperature below 0 ° C, preheated to 75 ~ 100 ° C.