S355G5+M Offshore Platform Steel Plate

The S355G5+M offshore platform steel plate is a thermomechanically rolled structural steel grade designed for marine and offshore constructions. It conforms to EN 10225 and is supplied in thicknesses from 3 mm up to 200 mm, widths between 1 220 mm and 4 200 mm, and lengths ranging 5 000 mm to 18 000 mm. The material composition delivers a minimum yield strength of 355 MPa and impact toughness suitable for low‑temperature environments such as the North Sea. Henan HZZ Iron and Steel lists the plate under the designation S355G5+M, indicating compliance with third‑party inspection requirements for critical structural use.

The grade combines a fine grain structure with controlled carbon and manganese levels, providing superior weldability and fracture resistance compared with conventional hot‑rolled steels. Typical industry practice treats S355G5+M as a typical offshore structural steel, with standard surface condition of mill‑finished, ready for further processing or coating. Buyers often request certification to the EN 10225 standard and a mill test certificate confirming mechanical properties for each heat. While the supplier does not publish a specific coating, the plate can be painted or clad according to project specifications.

This plate is primarily used for offshore drilling rigs, floating production storage and offloading units, and marine jack‑up platforms where high toughness and corrosion resistance are essential. Major purchasers include shipyards, offshore engineering firms, and energy infrastructure contractors that require large‑format plates for load‑bearing structures. Trade negotiations are handled directly with Henan HZZ Iron and Steel, with delivery terms and payment conditions agreed per order. Prospective importers should confirm the exact dimensions, packaging format (e.g., bundled pallets), and any required inspection regime before finalising the contract.

Henan HZZ Iron and Steel Co., Ltd. is located at Jincheng International Building 6, Zhengzhou 450000, Henan Province, China. The company operates as an imported‑tier supplier on the platform, classified under the “harbor” trust tier. Its public profile shows a response rate of 0.00 and no recorded average response time, indicating that buyers should initiate contact well in advance. The firm specialises in the production and export of thermomechanically rolled steel plates for offshore and marine projects.

The current listing provides detailed dimensions, material grade, and compliance with EN 10225, but does not disclose specific certifications, MOQ, price, or lead‑time. Buyers can request mill test certificates, third‑party inspection reports, and shipping terms directly from the supplier. Henan HZZ offers the capability to cut plates to custom sizes upon request, subject to additional processing agreements. No further corporate history or client references are supplied in the public data.