What is the material of steel S400

S400 is JIS standard of Japanese steel, equivalent to the domestic Q235A structural steel, can be used for casting, used in casting steel. S400 is a Japanese brand, and the common structural steel in JIS series is mainly composed of three parts: the first part is the material, such as: S for steel, F for iron; The second part represents different shapes, types and uses, such as P for plate, T for tube, K for tool; The third part shows the characteristic number, which is generally the minimum tensile strength. For example: SS400 - the first S represents steel, the second S represents "structure", 400 is the lower limit tensile strength of 400MPa, the overall tensile strength of 400 mpa ordinary structural steel.