GB/T1591 Q345 steel include Q345A, Q345B, Q345C, Q345D, Q345E steel. GB/T1591 Q345 steel plate external implementation of the standard is:gb709, the internal implementation of the standard is:gb/t1591-94, due to the reasons for the implementation of the standard, such as the negative tolerance of the steel plate. The latest implementation of the standard is GB/T1591-2008.
Q345 Steel Specification and Equivalent StandardQ345 steel specification:Q345 steel belongs to 16Mn steel grade, usually it is produced in hot rolled state, hot rolled steel plate, hot rolled steel coil/sheet, it has comprehensive mechanical and welding property, as it shows good performance in structural purposes, it is widely used as welding structural part in manufacturing of ship, railway and vehicles, bridges, boiler, pressure vessel
Dec 08, 2019 · Q345 steel is a Chinese GB standard Low Alloy High Strength Structural Steel, material density is 7.85 g/cm3, tensile strength is 470-630 Mpa, and yield strength is 345 MPa, it has better properties than Q235. According to GB/T 1591 2008, Q345 material has 5 quality grades:Q345A, Q345B, Q345C, Q345D and Q345E.