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Atmospheric corrosion resistant Q420qDNH bridge steel plate

1. Q420qDNH atmospheric corrosion resistant bridge steel plate chemical composition (mass fraction) /%:

Grade C Si Mn Nb V Ti Cr Ni Cu N Al Mo
Q420qNH ≤0.11 0.15-0.5 1.1-1.5 0.01-0.1 0.01-0.1 0.006-0.03 0.4-0.7 0.3-0.4 0.25-0.5 ≤0.008 0.015-0.05 ≤0.20

2. Mechanical properties of Q420qDNH bridge steel plate:

Grade Quality
level
Yield strength ReL(N/mm2) Tensile strength Rm/(N/mm2) Elongation A/% Impact energy (longitudinal) Akv/J
Plate thickness/mm
≤50 >50-100 >100-150 Temperature Min.
Q420qNH D ≥420 ≥410   ≥540 ≥19 -20 120
E -40
F -60 47

3. Z-direction performance of Q420qDNH steel plate: Q420qDNH-Z15, Q420qDNH-Z25, Q420qDNH-Z35.

4. The executive standard of Q420qDNH bridge steel plate is GB / T 714, which is a weather resistant bridge steel plate.

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