Q420qE, Q420qE-Z35 structural steel plate
GB/T 714 Q420qE grade is a high strength structural steel. This steel is mainly used to manufacture steel for railway and highway bridges. It is required to have high strength and satisfactory resistance, low notch sensitivity, good low temperature resistance, anti-aging sensitivity, anti-fatigue function and welding function.
GB/T 714 Q420qE chemical composition (%)
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
Mo |
B |
N |
Als |
|
≤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 mechanical properties
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 |
|
420 |
410 |
540 |
19 |
0 |
47 |
Z-direction performance of Q420qE-Z35 structural steel plate
The tear resistance of the steel plate is very good, stable, and the welding performance is excellent.
Q420qE-Z35 material is widely used in long-span structural bridge structures, and weather-resistant bridge steel plates are also used in many projects.
Pre: Grade AH32 shipbuilding steel plates July inventory 2021
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