Technical differences between SS400 steel plate and Q235B steel plate

SS400 is the standard plate, in the chemical composition, and China's Q235B steel plate is very close, if it is not an export list, it can be used with each other. However, there will be differences in the specific indicators, Q235 steel plate has made specific requirements for the content of C, Si, Mn, S, P and other elements, but SS400 steel plate in the chemical composition, only S and P are required to be less than 0.050, and the other has no special text requirements. The yield point of Q235 is greater than 235 MPa in our national standard, while the yield point of SS400 is 245MPa. This is the difference in yield, SS400 steel for general structure is a general structural steel with tensile strength greater than 400MPa. 400 represents the tensile requirements, Q235 is the yield point greater than 235MPa ordinary carbon structural steel. The implementation standard for SS400 is JIS G3101. The Q235 execution standard is GB/T700 or GB/T3274.

SS400 is a way of marking Japanese steel, in fact, it is the domestic Q235 steel, which is a kind of steel material.

SS400 is the most versatile. Often rolled into wire or round steel, square steel, flat steel, Angle steel, I-steel, channel steel, window frame steel and other types of steel, medium thickness steel plate. Widely used in construction and engineering structures. It is used to make steel bars or build plant frames, high-voltage transmission towers, Bridges, vehicles, boilers, containers, ships, etc., and is also widely used as mechanical parts with low performance requirements. C, D grade steel can also be used for some professional steel.