JIS G3101 SS400 Mild Steel Plate is popular for proper tensile strength and toughness, good plasticity, welding performance, and processing property. It is widely used for numerous industries and applications and due to its excellent performance and quality, it is considered among the best steel grade. SS400 steel is the most commonly used hot-rolled structural steel (formerly known as SS41) in Japan and is called general structural rolled steel in JIS G3101. SS400 material is cheap and versatile and plays an important role in construction, bridges, civil engineering, and mechanical equipment structures.