A

B

D

E

AH32

DH32

EH32

FH32

AH36

DH36

EH36

FH36

AH40

DH40

EH40

FH40

AH420

DH420

EH420

FH420

AH460

DH460

EH460

FH460

AH500

DH500

EH500

FH500

AH550

DH550

EH550

FH550

AH620

DH620

EH620

FH620

AH690

DH690

EH690

FH690

AH790

DH790

EH790

FH790

AH890

DH890

EH890

FH890

AH960

DH960

EH960

FH960

EH36-BCA1 COD

EH40-BCA1 COD

EH47-BCA1 COD

EH40-BCA2 COD

EH47-BCA2 COD

FAQ

❓ How are shipbuilding steel plates classified?

Shipbuilding steel plates are generally classified into normal strength, high strength, and ultra-high strength grades based on their minimum yield strength and impact toughness requirements.

❓ What is the difference between normal strength and high/ultra-high strength steel?

Normal strength steels (Grade A, B, D, E) have a lower yield strength (~235 MPa) and are used for general ship structures. High and ultra-high strength steels (AH36–AH960) provide higher load-bearing capacity and are suitable for critical and heavy-duty structures.

❓ Can different grades of steel be combined in one ship structure?

Yes. Shipbuilders often combine different grades, using higher strength or crack arrest steels in critical areas while normal strength steels are used in secondary structures to optimize cost and safety.