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Shipbuilding steel plate

Shipbuilding steel plate

Steel plates for shipbuilding are hot-rolled steel for manufacturing ship structures produced according to the requirements of the Construction Industry Association. It is often ordered, dispatched and sold as special steel, including ship plates and steel.

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PRODUCT DESCRIPTION

Shipbuilding steel plate

Steel plates for shipbuilding are carbon and alloy steel plates used in offshore and marine engineering. Common grades include A, B, D, E, AH32/36/40, DH32/36/40, EH32/36/40, etc., ranging from different strengths. These plates are commonly used in the manufacture of hulls, bulk carriers, container ships and LNG carriers, bulkheads, upper decks and hatch covers.

The primary application is already in the name of shipbuilding steel: These steel grades are used for cabin structures on cruise ships. Particularly thin plates are used in large widths for such applications. These sheets exhibit best processing properties such as flatness and weldability. High-strength, thermomechanically rolled ship plates, on the other hand, are used in the offshore sector. They are used for deck superstructures on platforms or for special ships in the oil and gas industry.

High-strength shipbuilding steel plates can be divided into: AH32, DH32, EH32; AH36, DH36, EH36 and AH40, DH40, EH40.
1,General grades A, B, D, E are distinguished by the impact temperature of the steel. The impact value of all steel grades is the same.
2, High-strength hull structural steel preheating requirements: for all AH, DH, EH plate thickness greater than 30mm angle, butt joints, preheat to 120 ~ 150 ℃ before welding.
3, Plate thickness ≤ 30mm, ambient temperature below 5 ℃, preheating to 75 ℃; ambient temperature below 0 ℃, preheating to 75 ~ 100 ℃.

PRODUCT DESCRIPTION

Shipbuilding steel plate classification

Shipbuilding plates can be divided into the following grades according to their yield strength:
Grade A steel is the impact force at room temperature (20 °C).
Class B steel is impact force at 0 °C.
Class D steel at -20 °C.
Grade E steel at -40 °C.

Specification

Shipbuilding steel plate chemical composition

Elements

C

Mn

Al

Si

P

S

AH32

≤0.18

0.7~1.60

≥0.015

0.10~0.50

≤0.04

≤0.04

DH32

≤0.18

0.90~1.60

≥0.015

0.10~0.50

≤0.04

≤0.04

EH32

≤0.18

0.90~1.60

≥0.015

0.10~0.50

≤0.04

≤0.04

AH36

≤0.18

0.7~1.60

≥0.015

0.10~0.50

≤0.04

≤0.04

DH36

≤0.18

0.90~1.60

≥0.015

0.10~0.50

≤0.04

≤0.04

EH36

≤0.18

0.90~1.60

≥0.015

0.10~0.50

≤0.04

≤0.04

PRODUCT DESCRIPTION

Shipbuilding steel plate physical properties

Mechanical Properties

Steel Grade

Thickness/mm

Yield point/ MPa

Tensile strength/ MPa

Elongation/ %

V-type impact test

Temperature/ 

Average impact absorption

workAkv/J

Vertical

Horizontal

A

≤50

≥235

400~490

≥22

-

-

-

B

≤50

≥235

400~490

≥22

0

≥27

≥20

D

≤50

≥235

400~490

≥22

-10

≥27

≥20

E

≤50

≥235

400~490

≥22

-40

≥27

≥20

AH32

≤50

≥315

440~590

≥22

0

≥31

≥22

DH32

≤50

≥315

440~590

≥22

-20

≥31

≥22

EH32

≤50

≥315

440~590

≥22

-40

≥31

≥22

AH36

≤50

≥355

490~620

≥22

0

≥34

≥24

DH36

≤50

≥355

490~620

≥22

-20

≥34

≥24

EH36

≤50

≥355

490~620

≥22

-40

≥34

≥24

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