At Cehe Steel, we supply a wide range of marine and offshore steel grades used in shipbuilding, offshore engineering, energy projects, and heavy marine fabrication. Our focus is not only on steel strength, but also on practical performance in real working conditions — including weldability, toughness, dimensional stability, and corrosion resistance in harsh ocean environments.

  China has become one of the world’s leading centers for shipbuilding and offshore manufacturing, and we work closely with reliable steel mills to support global buyers with stable quality, flexible customization, and efficient export service. Whether you are sourcing offshore structural steel, marine-grade high-strength plates, or corrosion-resistant solutions for coastal applications, our team is ready to support your project with technical understanding and responsive communication.

  We understand that marine engineering projects often involve strict standards, classification society requirements, and complex procurement schedules. That is why we place equal importance on material traceability, documentation support, and long-term business reliability — not just shipment itself.

  In marine engineering, reliability is never optional. The right steel is where every safe structure begins.

Grade Quality Grade Manufacturing Execution Standard
General Strength A GB/T 712-2022
B GB/T 712-2022
D GB/T 712-2022
E GB/T 712-2022
High Strength AH32, DH32, EH32, FH32 GB/T 712-2022
AH36, DH36, EH36, FH36 GB/T 712-2022
AH40, DH40, EH40, FH40 GB/T 712-2022
Ultra-high Strength AH420, DH420, EH420, FH420 GB/T 712-2022
AH460, DH460, EH460, FH460 GB/T 712-2022
AH500, DH500, EH500, FH500 GB/T 712-2022
AH550, DH550, EH550, FH550 GB/T 712-2022
AH620, DH620, EH620, FH620 GB/T 712-2022
AH690, DH690, EH690, FH690 GB/T 712-2022
AH790, DH790, EH790, FH790 GB/T 712-2022
AH890, DH890, EH890 GB/T 712-2022
AH960, DH960, EH960 GB/T 712-2022
FH420, FH460, FH500, FH550, FH620, FH690, FH790 GB/T 712-2022
Thickness-directional Steel (Z25/Z35)
Applicable for corresponding grades
GB/T 712-2022 & GB/T 5313 ——
Note: Based on GB/T 712-2022 "Structural Steel for Ships and Ocean Engineering". Covers General Strength grades (A, B, D, E), High Strength grades (AH32 to FH40), and Ultra-high Strength grades (AH420 to AH960 with corresponding DH, EH, FH). Thickness-directional property steel (Z25, Z35) shall comply with GB/T 5313. Please refer to the original standard for detailed mechanical properties and delivery conditions.
Explanation: Some FH grades (e.g., FH890) are not listed separately in the table; they can be supplied according to similar grade requirements upon agreement. The table includes all grades explicitly specified in Table 1 of the standard.