Q355 is a low-alloy high-strength structural steel known for its excellent comprehensive properties, including低温 resistance, ease of welding, cold stamping capability, and machinability. It is widely used in bridges, vehicles, ships, construction, pressure vessels, towers, and special equipment.

Q355B channel steel is a long strip steel with a concave-shaped cross-section, categorized as construction and mechanical carbon structural steel. It is a steel section with a complex shape, characterized by its concave profile. Channel steel is primarily used in building structures, curtain wall projects, mechanical equipment, and vehicle manufacturing.