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Our premium Q355 series, featuring Q355B/C/D, Q420, and Q460, represents the pinnacle of low-alloy, high-strength structural steel. Specifically engineered for welded structures subjected to extreme stress and heavy loads, these medium-thick hot-rolled plates provide an optimized balance of yield strength and ductility, serving as the modern industrial successor to the older Q345 standards.
Designed for uncompromising versatility and durability, these high-strength steel plates are the primary choice for critical infrastructure. From petroleum storage tanks and high-pressure vessels to sophisticated shipbuilding and bridge construction, our materials ensure total structural integrity and superior weldability in the most challenging commercial and industrial environments.
| Steel Grade | Q355B/C/D, Q420MB/C/D, Q460MB/C/D | Manufacturing Process | Hot Rolled / Medium Thick Plate |
|---|---|---|---|
| Yield Strength | 355 MPa (Minimum for Q355) | Material Type | Low Alloy High-Strength Steel |
| Key Feature | Excellent Weldability & Toughness | Corrosion Resistance | High Industrial Grade |
| Primary Use | Heavy Load Welded Structures | Application Area | Commercial Buildings & Infrastructure |
| Compliance | Industrial Structural Standards | Surface Finish | Mill Finish / Hot Rolled |
Engineered to support extreme stress and heavy structural loads without deformation.
Ample corrosion resistance ensures a longer lifecycle in harsh outdoor environments.
Optimized chemical composition allows for seamless and high-strength welded joints.
Ideal for boilers, pressure vessels, ships, and high-rise commercial building frames.
Strict adherence to yield point specifications for predictable structural performance.
Modern replacement for Q345, providing updated strength and reliability metrics.
Full-cycle control from coal washing and sintering to steelmaking and rolling.
Annual production of 10 million tons of iron, steel, and high-grade materials.
Dedicated scientific research teams ensuring the highest steel purity and strength.
Specializing in bridge, boiler, automotive, and pipeline steel solutions.
A robust workforce of 6,000+ employees ensuring efficient global delivery.
Registered capital of US$29.8 million supporting large-scale project procurement.
| Comparison Feature | Standard Structural Steel | High-Strength Q355 Series |
|---|---|---|
| Yield Strength | Basic/Moderate | Superior (355MPa+) |
| Weld Performance | Standard | Excellent/High-Efficiency |
| Lifespan | Medium | Extended (High Corrosion Resist) |
| Load Capacity | Standard | Heavy-Duty / Extreme Stress |
| Project Cost | Lower Initial Cost | Lower Long-term Maintenance |
Q355 is the modern successor to Q345. It provides improved yield strength and better mechanical properties, making it more suitable for contemporary high-load structural applications.
It is widely used in shipbuilding, bridge construction, high-rise commercial buildings, pressure vessel manufacturing, and the production of offshore containers.
Yes, due to its excellent weldability and corrosion resistance, Q355 is highly recommended for petroleum storage tanks and high-pressure vessels.
The "Q" refers to the yield point of the steel, and the number "355" represents its minimum yield strength in Megapascals (MPa).
Yes, our production line includes specialized steel for automotive structures, designed to balance strength with safety and weight requirements.
Our comprehensive steel enterprise has an annual production capacity of 10 million tons each for iron, steel, and high-grade materials.
