Q420C is a high-strength structural steel plate with improved impact toughness compared with Q420B. Manufactured according to GB/T 1591, Q420C provides a minimum yield strength of 420 MPa and requires impact testing at 0°C.

With higher strength and reliable toughness, Q420C is suitable for structural applications where safety, durability, and long-term performance are important considerations.

Compared with conventional structural steel grades, Q420C helps reduce steel consumption and improve structural efficiency through its higher strength-to-weight ratio.

CEHE STEEL supplies Q420C steel plates for construction, infrastructure, machinery manufacturing, and heavy fabrication applications.