Q420qDNH steel is a structural steel grade specially used to build various steel structure bridges (railroad, highway, cross-water, and cross-sea). It has high strength, toughness, and load and impact performance of rolling stock. In addition, Q420qDNH steel plate has good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance.
Q420qDNH mechanical properties
| Tensile requirement |
Impact test |
| Yield strengthReL/MPa |
Tensile strength Rm/MPa |
Elongation A/% |
temperature |
Shock absorption energy, KV2/J |
| Thick≤50mm |
Thick50mm-100mm |
Thick100mm-150mm |
℃ |
| Min. |
|
Min. |
| 420 |
410 |
--- |
540 |
19 |
-20 |
120 |
| 420 |
410 |
--- |
540 |
19 |
-40 |
120 |
| 420 |
410 |
--- |
540 |
19 |
-60 |
47 |
At present, with the rapid development of the domestic steel industry and the increasing application of bridge steel, there is an urgent need to accelerate the promotion and application of high-performance bridge steel to meet the needs of modern steel bridge manufacturing. Bridge steel will also be further developed.
