High Strength Q355 Q420 Q460 Steel Plate Factory And Trusted China Suppliers
Our Q355 series includes Q355B, Q355C, Q355D, Q420, and Q460 grades, offering low-alloy, high-strength steel for demanding structural applications. These medium-thick hot-rolled plates are designed for welded structures exposed to significant stress and heavy loads. Their combination of yield strength and ductility makes them a practical choice for projects that require strength alongside dependable fabrication performance. Q355 is also the modern industrial successor to the earlier Q345 standard.
Suitable for a wide range of infrastructure and industrial requirements, Q355, Q420, and Q460 steel plates are used in projects where structural strength and weldability matter. Typical applications include petroleum storage tanks, high-pressure vessels, shipbuilding, bridge construction, commercial buildings, and other heavy-load welded structures. The appropriate grade and plate selection should be matched to the engineering and service requirements of each project.
Detailed Parameters
| 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 |
Key Advantages
High Load Capacity
Designed for welded structural applications that must withstand substantial stress and heavy loads while maintaining structural integrity.
Durable Performance
Industrial-grade corrosion resistance supports durable service in demanding environments, including outdoor applications.
Excellent Weldability
The material is suited to welded structures, supporting the fabrication of strong, reliable joints when processed appropriately.
Versatile Applications
Used in boilers, pressure vessels, ships, and structural frames for high-rise commercial buildings.
Defined Strength Properties
Yield point specifications help engineers select material for predictable performance in structural applications.
Modern Structural Steel
Q355 is the modern replacement for Q345, providing updated strength and reliability properties for structural projects.
Product Gallery
Management Platforms
Integrated Production
Production is managed across the full process, from coal washing and sintering through steelmaking and rolling.
Large-Scale Capacity
Annual production capacity is 10 million tons each for iron, steel, and high-grade materials.
Quality Research
Dedicated scientific research teams focus on steel purity, strength, and product quality.
Diverse Steel Portfolio
Product expertise includes steel solutions for bridges, boilers, automotive applications, and pipelines.
Scale Operations
A workforce of more than 6,000 employees supports operations and global delivery.
Financial Stability
Registered capital of US$29.8 million supports large-scale project procurement.
Investment Return Comparison
| Comparison Feature | Standard Structural Steel | High-Strength Q355 Series |
|---|---|---|
| Yield Strength | Basic or moderate | Superior; 355 MPa or higher |
| Weld Performance | Standard | Excellent, supporting efficient fabrication |
| Lifespan | Medium | Extended, with high corrosion resistance |
| Load Capacity | Standard | Heavy-duty performance for extreme stress |
| Project Cost | Lower initial cost | Potentially lower long-term maintenance costs |
Frequently Asked Questions
Q355 is the modern successor to Q345. It offers improved yield strength and mechanical properties for contemporary structural applications involving higher loads.
These plates are used in shipbuilding, bridge construction, high-rise commercial buildings, pressure vessel manufacturing, and offshore container production.
Yes. Its weldability and corrosion resistance make Q355 a suitable option for petroleum storage tanks and high-pressure vessels, subject to project specifications.
The “Q” refers to the steel’s yield point. The number “355” indicates its minimum yield strength in megapascals (MPa).
Yes. The manufacturer’s production line includes specialized steel for automotive structures, designed to balance strength with safety and weight requirements.
The comprehensive steel enterprise reports annual production capacity of 10 million tons each for iron, steel, and high-grade materials.