Q345 steel plate is carbon alloy steel. Q345 steel plate has good cold stamping performance, good welding performance and machinability. Q345 steel plate is widely used in bridges, vehicles, ships, buildings, pressure vessels, etc.
Q represents the yield of this material, and 345 in the back refers to the yield value of this material, which is around 345MPa. The yield value decreases as the thickness of the material increases. It consists of Q+number+quality grade symbol+deoxygenation method symbol.
Its steel number is prefixed with "Q", which represents the yield point of the steel, and the following number represents the yield point value in MPa. For example, Q235 represents a carbon structural steel I with a yield point (Rel) of 235 MPa. If necessary, symbols indicating quality grade and deoxidation method can be marked after the steel number. The quality grade symbols are A, B, C, D, and E, respectively.
Symbol of deoxidation method: F stands for boiling steel; b stands for semi-killed steel: Z stands for killed steel; TZ stands for special killed steel. For example Q235-AF means A-grade boiling steel.
