S235 steel plate refers to a carbon structural steel plate that conforms to the European standard EN 10025. This standard specifies the technical delivery conditions for non-alloy structural steels used in general construction and engineering applications.

S235 steel is commonly used in various industries and sectors due to its good weldability, machinability, and formability. The 235 refers to a minimum yield strength of 235 megapascals (MPa). These plates are available in different grades designated as S235JR, S235J0, S235J2, and S235K2. These grades determine the performance and suitability for different types of construction projects.