SN490B high construction steel

SN490B steel is a high construction steel for for seismic construction. It is equivalent to the Chinese steel grade Q490C. We can supply SN490B steel plates, SN490B steel angles and SN490BH section steel. 
Executive standard: YB4104 JIS G3136 BS7191

SN490B section steel is a special steel for seismic construction developed in Japan. Japanese users have very strict requirements on the composition of the finished product of this steel. The composition and performance of the original product cannot meet the needs of users. Laiwu Steel analyzed the reasons for the fluctuation of the main chemical composition of the steelmaking process in accordance with the main technical and economic indicators of the Japanese standard SN490B H-shaped steel for building structure, and formulated appropriate adjustments to the composition and reduction of carbon increase in the steelmaking process. The composition control and the stability of mechanical properties have been greatly improved, meeting the requirements of Japanese customers.
SN steel is one of the structural steel specifications for construction in contemporary society. Because of its special construction method requirements, it improves the "strength", "toughness" and "weldability" of steel. It is different from the earlier SS series and SM series steels because there is no stipulation of the maximum yield strength or tensile strength, so that building materials may have too high strength, yield ratio problems, and insufficient alloy element regulations make it difficult to control and have better Anti-vibration effect. Therefore, the new generation of SN series material specifications will be born accordingly. SN steel like SN490B plate is currently mainly used in building structures, factories, stations and other buildings. Because of the high safety requirements, some advanced countries will require restrictions on the use of SN steel.

Pre: Q345qC, Q345qD, and Q345qE steel for bridges building

Next: GB/T1591-2018 Q355NE low alloy steel