What are the tensile strength of Q235 and Q345 steel respectively

What are the tensile strength of Q235 and Q345 steel respectively?
The tensile strength of Q235 steel is 370-500 MPa.
The tensile strength of Q345 steel is 450-600 MPa.

Q235 steel is a kind of carbon structural steel, also known as ordinary carbon structural steel. Alloy elements are not specially added into the Q235 steel; Q345 steel belongs to low-alloy high-strength steel, which will add a small amount of alloy elements. Q345 steel is mainly used in construction and engineering structures. Compared with Q235 steel, Q345 steel has higher strength. Q345 steel can reduce the weight of its own structure, save materials and increase its service life.