GB/T 714 Q420qE grade is a high-strength structural steel for bridges. It has high strength and satisfactory resistance, low notch sensitivity, good low temperature resistance, anti-aging sensitivity, anti-fatigue function and welding function. The main steel used is Q345q, Q370q, Q420q and other low-alloy high-strength steels. It is mainly used to make steel for railway and highway bridges.
GB/T 714 Q420qE steel chemical composition (%)
Grades |
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
Mo |
B |
N |
Als |
|
Q420qE |
≤0.18 |
≤0.55 |
1.00-1.70 |
≤0.020 |
≤0.010 |
≤0.06 |
≤0.08 |
≤0.03 |
≤0.80 |
≤0.70 |
≤0.55 |
≤0.35 |
≤0.004 |
≤0.012 |
≥0.015 |
Q420qE steel mechanical properties
Grades |
Yield strength(MPa) min for Thickness in mm |
Tensile strength min. |
Elongation |
V-type impact test |
||
|
≤50 |
>50≤100 |
Mpa |
% min |
Test temperature ℃ |
Impact absorption energy KV₂/J |
|
|
Q420qE |
420 |
410 |
540 |
19 |
0 |
47 |
Q420qE steel plate delivery condition: Q420qE steel plate is usually delivered in the state of thermomechanical rolling, and the steel plate should be delivered after trimming.
Q420qE material is structural steel for bridges, suitable for steel plates and section steels for bridge construction. Q420qD BBN Steel Plant can produce the steel plates and steel sections.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
