Q420qD steel plate for bridge
Q420qD steel plate is a high-strength structural steel that is a new type of steel in my country's independent innovation. It is a structural steel for bridges, suitable for steel plates and section steels for bridge construction.
Q420qD steel plate implements the standard GB/T 714-2008.
GB/T 714 Q420qD steel chemical composition (%)
Grades |
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
Mo |
B |
N |
Als |
|
Q420qD |
≤0.18 |
≤0.55 |
1.00-1.70 |
≤0.030 |
≤0.025 |
≤0.06 |
≤0.08 |
≤0.03 |
≤0.80 |
≤0.70 |
≤0.55 |
≤0.35 |
≤0.004 |
≤0.012 |
≥0.015 |
Q420qD 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 |
|
|
Q420qD |
420 |
410 |
540 |
19 |
0 |
47 |
Q420q steel plate series grades are Q420qD, Q420qC, Q420qE, Q420qF. When the steel plate is required to have thickness direction performance, the symbols Z15, Z25, and Z35 representing the thickness direction performance level are added to the above-mentioned grades respectively, namely Q420qCZ15, Q420qCZ25, Q420qCZ35, Q420qDZ15, Q420qDZ25, Q420qDZ35, Q420qEZ15, Q420qEZ25, Q420qEZ35, Q420qFZ15, Q420qFZ25, Q420qFZ35.
Q420qD steel plate delivery status: Q420qD steel plate is usually delivered in the state of thermomechanical rolling, and the steel plate should be delivered after trimming.
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