Both of them belong to EN 10025 European low alloy steel plate, and S355N is equivalent to the national standard Q345E, where N stands for normalization and L stands for low carbon. Material grade: S355NL, numerical code: 1.0546, standard: EN 10025 (2004). Country and region of structural steel hot-rolled products: Oulian Iron and Steel Group: Structural steel Note: The design fee in the last period was equivalent to 355ktn. Henan Sanyuan Iron and Steel Co., Ltd. mainly engaged in cutting and processing ultra-wide and ultra-thick special steel plates. Henan Sanyuan Iron and Steel Co., Ltd. is a subsidiary of Nanyang Hanye Special Steel Co., Ltd. and the holder of a large-scale special agreement of Wuyang Iron and Steel Co., Ltd., specializing in cutting and processing ultra-wide and ultra-thick special steel plates in Hanye and Wugang, and according to your requirements. According to the different needs of users, steel plates of various specifications can be customized and rolled in the shortest delivery time, and can be ordered 30% in advance. Now the available processing range is 8-600 mm thick and ≤4.6 m wide. Manager Cui's phone number (my user name)