Q420B is a high-strength low-alloy structural steel plate manufactured according to GB/T 1591. With a minimum yield strength of 420 MPa, Q420B provides higher strength compared with Q355 and Q390 steel grades, making it suitable for structures requiring improved load-bearing capacity.

The steel grade offers a good balance between strength, weldability, and fabrication performance. Q420B is widely used in large steel structures, industrial facilities, heavy machinery, and engineering projects where reducing structural weight while maintaining safety is important.

CEHE STEEL supplies Q420B steel plates with customized sizes, Mill Test Certificates (MTC), and inspection support for international fabrication projects.