Q420 has high strength, good anti fatigue performance; high toughness and low brittle transition temperature; good cold formability and weldability; has good anti corrosion resistance and wear resistance, high strength, particularly is in normalizing or normalizing and tempering has higher comprehensive mechanical properties.
Large ships, bridges, power station equipment, medium and high pressure boiler, high pressure vessel, locomotive and rolling stock, heavy machinery, mining machinery, and other large welded structures.