Shipbuilding Steel Despriction
Shipbuilding steel(Hull Steel, Marine Steels) refers to the carbon and alloy steel plate used in offshore and marine contructions, common grades are A, B, D, E, AH32/36/40, DH32/36/40, and EH32/36/40 which ranged from different strength. The plates usually used to manufacture ship hulls, bulkheads, upper decks and hatch covers for tankers, bulk carriers, container ships and LNG carriers.
steel plates used in shipbuilding are hot-rolled steel which is used for the manufacture of ship structures which is produced with the requirements of the construction society. It requires large quantities of structural steel plate to build to ship hull. shipbuilding sheet has been divided into two series i.e high strength and corrosion resistant steels for modern shipbuilding, which can be helpful to reduce the ship weight as well as the cost of maintenance.
shipbuilding Heavy plates are demanded for heavy thickness and good combination of high strength, toughness and weldability. Because of this, extra high-strength termomechanically processed steels it have been developed to be more user friendly compared to traditional steels.
Structural steel for ship hulls is divided into strength classes according to its minimum yield strength: general strength structural steel and high strength structural steel. Maine steel plate refers to hot rolled steel plate produced in accordance with the requirements of the classication society for the construction of ship hull structures.
Shipbuilding steel plate refers to hot-rolled steel for the manufacture of ship structures produced in accordance with the requirements of the construction society. Often used as a special steel ordering, scheduling, sales, a ship including ship plates, steel and so on.
Shipbuilding Steel Mechanical Properties
| Grade | Thickness (mm) |
Yieldpoint (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 Dimensions
Plate thickness: 5–140 mm max. (dependent on width and steel grade)
Plate width: 3,950 mm max. (dependent on thickness and steel grade)
Plate length: 18,700 mm max. (dependent on thickness and steel grade)
Ordered weight: At least 2 tons per line item
Unit weight: 19.5 tons max.
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