It is its yield stress which is equal to 235 N/mm2
A structural grade (S) with at minimum yield strength of 235 N/mm²m, the JR designation confirms that the steel has undergone longitudinal Chary V-Notch impact testing at 27J (Joules) at room temperature.
S235 steel is a high yield and tensile strength steel that is well-suited for structural applications such as bridges and buildings. It is also ideal for cold-forming, making it a popular choice for construction projects. S235 steel offers excellent resistance to corrosion, making it a great choice for indoor projects.
ASTM A500 Grade B is a specification for cold-formed and welded or seamless carbon steel structural tubing. Its equivalent grade in the European standard is typically considered to be S235 or S275, depending on the specific requirements for yield strength and application. However, direct equivalencies can vary based on the specific properties and intended use, so it's essential to consult material standards for precise applications.