Q620F steel plate is a high-strength quenched and tempered steel. Q represents the yield point of the steel, that is, the yield strength, and 620 represents the value of the yield point. F stands for -60 degree shock. Q620F means that the plastic deformation of the steel will only occur when the force strength reaches 620 MPa, that is, when the external force is released, the steel can only maintain the shape of the force and cannot return to the original shape. This strength is greater than that of ordinary steel.
On the basis of ensuring low carbon equivalent, Q620F steel plate appropriately increases the content of microalloying elements. Good welding performance requires low carbon equivalent of steel, and the increase of microalloying elements will increase the carbon equivalent of steel while increasing the strength of steel. But fortunately, the added carbon equivalent is very small, so it will not affect the welding performance of steel.
Q620F steel plate is a high-strength steel plate with low welding crack sensitivity. The thickness of Q620F steel plate is between 6mm-150mm. Q620F steel plate is mainly used in the production of pressure steel pipes for hydropower stations, engineering machinery, railway vehicles, bridges, high-rise and long-span buildings, etc. that require high weldability.
