Products Description
Q345D carbon plate shall be done charpy V-notch impacting test under minus 20 centigrade.Many container manufacturers adpots these high tension strength to make offshore containers which can be used in deep oceans.
Mechnical property for Q345D low alloy structural steel
| Thickness (mm) | ||||
| Q345D | ≤ 16 | > 16 ≤ 35 | > 35 ≤ 50 | >50 |
| Yield strength (≥Mpa) | 345 | 325 | 295 | 275 |
| Tensile strength (Mpa) | 470-630 | |||
Chemical composition for Q345D low alloy structural steel (Heat Analysis Max%)
| Main chemical elements composition of Q345D | ||||||||
| C | Si | Mn | P | S | V | Nb | Ti | Al (min.) |
| 0.18 | 0.55 | 1.00-1.60 | 0.030 | 0.030 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | 0.015 |
Products Application
Q345D low alloy structural steel plate is widely used in heavy-duty engineering and construction projects that demand both high strength and superior toughness at low temperatures.
Due to its excellent weldability and impact resistance (with a Charpy V-notch impact energy ≥ 27 J at -20°C), it is commonly applied in bridge construction, offshore platforms, and large-scale building frameworks exposed to cold environments.
The steel's fine grain structure ensures high load-bearing capacity and stable performance even under dynamic stress conditions.
In addition, Q345D steel plate is extensively utilized in manufacturing cranes, pressure vessels, heavy machinery, and structural parts for ships and wind towers.
Its yield strength of approximately 345 MPa and tensile strength range of 470–630 MPa make it suitable for fabricating critical components that require durability and fatigue resistance.
With proper surface treatment and fabrication processes, Q345D provides long-term reliability and cost efficiency in both industrial and infrastructural applications.
