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 | —— |
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.