Brief introduction of Q420qDNH steel plate

Brief introduction of Q420qDNH steel plate: Q420qDNH is a carbon structural steel with weather resistance, belonging to the steel plate for bridges. Q420qDNH steel plate executive standard: GB/T714 standard.

The grade of Q420qDNH steel plate indicates:
"Q": the first letter of the Chinese phonetic alphabet of the word "Qu" which represents the yield strength of steel
"420": yield strength is 420, unit: MPa
"Q": the first letter of the Chinese pinyin of the word "bridge", which represents the steel used for bridges
"D" quality grade is D, impact test at - 20℃
The first letter of the Chinese pinyin of "N" weathering steel plate
The first letter of the Chinese phonetic alphabet of "H" weathering steel plate

Chemical composition of Q420qDNH steel plate:
C: ≤0.11, Si: 0.15-0.5, Mn: 1.1-1.5, V: 0.01-0.1, Nb: 0.01-0.1, Ti: 0.006-0.03, Cr: 0.4-0.7, Ni: 0.3-0.4, Cu: 0.25-0.5, N: ≤0.008, Al: 0.015-0.05, Mo: ≤0.20

Application range of Q420qDNH steel plate:
Q420qDNH steel plate has good fatigue resistance, low temperature toughness and atmospheric corrosion resistance, and is widely used in the construction of steel plates for railway or sea-crossing bridges.