The astm equivalent grades of Q355NH steel plate

The mechanical properties of Q355NH steel plate meet the technical requirements. Q355NH steel plate has high strength, low thickness effect, excellent low temperature impact performance and excellent welding joint performance.

The corrosion resistance of Q355NH steel plate is obviously superior to that of Q345B steel, which is equivalent to that of ASTM A 588 Gr.A steel.

Q355NH steel plate and ASTM A 588 Gr.A steel contain copper, chromium, nickel and other alloy elements. The good corrosion resistance of the alloy is closely related to these alloy elements and the structure of rust layer.

With the increase of corrosion time, the corrosion rate of Q355NH steel plate and contrast steel decreases, and the long-term corrosion behavior has the same trend. This is related to the electrochemical reaction process of Q355NH steel plate in industrial atmospheric environment.