Performance requirements of EH690 steel plate

EH690 steel plate has high strength and resists the impact of wind flow above the water surface. It has good resistance to lamellar tearing and avoids tearing when it receives external force in the thickness direction.

EH690 steel plate has good low temperature impact performance, and some steels used in offshore platforms need to have the performance of serving in extremely cold environments.

EH690 steel plate has good welding performance, and the performance of the welded joint has the same or similar mechanical properties as the base metal, ensuring the safety of the overall structure of the offshore platform.

Steel purity requirements. EH690 steel needs to have very low content of S, P and other magazine elements, and has high requirements for the morphology, type and distribution of inclusions, to avoid fatigue failure of offshore platforms under the influence of typhoons and current movements, and to protect life and property safety.

Corrosion resistance requirements. Because the marine engineering structural steel plate has been in the environment of salt spray, moisture and seawater for a long time, it is eroded by seawater and marine organisms and produces severe electrochemical corrosion. The paint film is prone to severe saponification and aging, resulting in very serious structural corrosion. Not only it reduces the mechanical properties of structural materials, shortens its service life, and because it is far from the coast, it cannot be regularly repaired and maintained like ships. Therefore, the requirements for corrosion resistance of EH690 steel plate etc. marine engineering structural steels are higher.