GB/T714 Q420qDNH steel is a structural steel grade for bridge construction. It is specially used to build various steel structure bridges (railroad, highway, cross-water, and cross-sea).
Q420qDNH steel meaning
Q——The first letter of the Chinese pinyin of the word "qu" for the yield strength of steel used in bridges.
420——Specify the minimum yield strength value, in MPa;
q-the first letter of the Chinese phonetic alphabet of the word "bridge" used for bridge steel;
N——The first letter of the Chinese phonetic alphabet of the word "Nei";
H——The first letter of the Chinese Pinyin of "hou";
D, E, F-quality level.
Q420qDNH material has high strength, toughness, and load and impact performance of rolling stock. In addition, Q420qDNH steel plate has good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. It is is widely used in steel plates for railway or sea-crossing bridges.
