Chemical Composition of Structural Steels Pipe - S235, S275 and S355

The Chemical composition of Structural Steel pipe is extremely important and highly regulated. It is a fundamental factor which defines the Mechanical properties of the steel material. In the following table you can see the Max % levels of certain regulated elements present in European Structural steel grades S235, S275 and S355.

The chemical composition of Structural Steel is incredibly important to the engineer and will change with specific Grades depending on their intended use. For Example; S355K2W is a Structural Steel that has been hardened (K2) and has been designed with a chemical composition to withstand increased weathering (W). Therefore, this grade of Structural Steel pipe will have a slightly different chemical composition to the standard S355 grade.