Q420 Q460 Q500 Q550 Q620 Q690 high strength steel application

Q420A high strength steel application: Large welding structure, bridge, vehicle, ship, high pressure vessel, power station equipment, liquid ammonia tank car, etc.

Q420B steel is used as Q420A. Q420B high strength steel is used for structural parts requiring normal temperature impact performance.

Q420C: Same as Q420A. Q420C steel is used for structural parts requiring low temperature 0℃ impact performance.

Q420D steel: Same as Q420A. Q420D steel is used for structural parts requiring low temperature -20℃ impact performance, only for plate (strip) material.

Q420E steel: Same as Q420A. Q420E steel is used for structural parts requiring low temperature -40℃ impact performance, only for plate (strip) material.

Q460C Q460D Q460E: They are respectively used as high strength steel structural parts for engineering and general structures with impact performance requirements at low temperature of 0 ℃, - 20℃ and - 40 ℃, only for plate (strip) materials.

Q500C, Q500D, Q500E, Q550C, Q550D, Q550E, Q620C, Q620D, Q620E, Q690C, Q690D, Q690E high strength steel: Compared with Q460C, D and E, they have higher yield strength, which are 500 MPa, 550 MPa, 620 MPa and 690 MPa respectively.