Q345GJC-Z15 structural steel for high-rise buildings

1. Q345GJC-Z15 is structural steel for high-rise buildings. Q stands for yield, 345 stands for yield strength, and GJ stands for "high-build" in Chinese. Z15 stands for performance in the thickness direction. The same series grades are Q345GJC-Z25, Q345GJC-Z35. Q345GJC-Z15 structural steel plate is used to make steel for high-rise and important building structures. It is required to have high impact resistance, satisfactory strength, excellent welding performance, certain yield ratio, and thickness direction function when necessary.

2. Chemical composition of Q345GJC-Z15 structural steel plate:

3. Mechanical properties of Q345GJC-Z15 structural steel plate:

4. Q345GJC-Z15 steel plate delivery status: the steel plate should be normalized, hot rolled, normalized + tempered, or quenched + tempered. The specifics should be negotiated between the supplier and the demander.

5. If there are a large number of aggregated inclusions in Q345GJC-Z15 structural steel plate, the Z-direction performance of the steel plate will be inconsistent. The main components of these inclusions are carbon (nitride) compounds of Nb and Ti, oxides of MnS, Al and Ca.