Bridge Steel Plate
Bridge steel plate for medium and heavy plates is the core material for modern long-span bridges. As the "skeleton" of key structures such as main girders and bridge towers, its technological advancement not only supports the construction of super projects but also drives the entire industry toward higher strength, longer service life, and improved construction efficiency. As bridge spans advance toward the 2000-meter or even 3000-meter class, the demand for high-strength steel grades such as Q500q and Q690q will continue to grow, while posing challenges to the production capacity of ultra-wide and ultra-thick steel plates.
Product Advantages
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Superior Load-Bearing Capacity and Weight Reduction
By adopting high-strength steel grades such as Q420q, Q500q, and Q690q, plate thickness and structural dead weight can be significantly reduced while ensuring structural safety, enabling the realization of longer bridge spans.
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Robust Environmental Adaptability and Toughness
Through the addition of microalloying elements and advanced thermomechanical controlled processing (TMCP), the grain structure is refined, maintaining excellent impact toughness even at low temperatures, making it suitable for extreme environments such as plateaus and cold regions.
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Excellent Construction Efficiency and Weldability
Good weldability is key to ensuring bridge construction efficiency and structural safety. Modern bridge steel employs carbon equivalent control and crack sensitivity index control to ensure weld joint performance matches the base metal while improving construction efficiency.
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Extended Service Life and Low Maintenance Costs
This is the most revolutionary advantage of weathering bridge steel. The dense rust layer formed on its surface acts as a "protective film," offering weathering resistance 2 to 8 times that of plain carbon steel. Combined with its high fatigue resistance, it can better withstand long-term dynamic loads, enabling paint-free, maintenance-free long-term service and significantly reducing life-cycle costs
Market Applications
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Core Application Scenarios
From suspension bridges spanning valleys (such as the Changtai Yangtze River Bridge) and cross-sea bridges connecting islands (such as the Pingtan Strait Bridge), to urban viaducts, railway overpasses, and numerous railway bridges, bridge steel plate is widely adopted.
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Market Size and Growth
As the world's largest bridge steel market, China's production reached 1.34 million tons in the first half of 2025, while exports of Chinese steel bridges reached 43,900 tons during the same period, demonstrating strong international competitiveness.
Specifications
| Execution Standard | Grade | Guaranteed Properties (mm) | Guaranteed Ultrasonic Testing (mm) | Delivery Condition |
| GB/T714 | Q345qC/qD/qE、Q370qC/qD/qE、Q390qC/qD/qE、Q420qD/qE、Q460qD/qE、Q500qD/qE/qF、Q550qD/qE/qF、Q620qD/qE/qF、Q690qD/qE/qF、Q345qCNH/qDNH/qENH、Q370qCNH/qDNH/qENH、Q390qCNH/qDNH/qENH、Q420qDNH/qENH、Q460qDNH/qENH、Q500qDNH/qENH/qFNH、Q550qDNH/qENH/qFNH | 6～100 | 6～100 | TM、TM+T、QT |
| ASTM A588 | GrA、GrB、GrK | 6～100 | 6～100 | AR、N、TM |
| ASTM A709 | Gr36、Gr50、Gr50W、GrHPS50W、GrHPS70W、GrHPS100W | 6～100 | 6～100 | AR、N、TM、QT |
| ASTM A871 | Gr60、Gr65 | 6～90 | 6～90 | AR、N、QT |
| EN10025 | S355JOWP/J2WP、S355JOW/J2W/K2W/J4W/J5W、S420JOW/J2W/K2W/J4W/J5W、S460JOW/J2W/K2W/J4W/J5W | 6～100 | 6～100 | AR、N、TM |
| JIS G 3106 | SM490A/B/C、SM490YA/YB、SM520B/C、SM570 | 6～120 | 6～100 | AR、N、TM、T、QT |
| JIS G 3101 | SS490、SS540 | 6～120 | 6～100 | AR |
We Value Every Customer
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Phone
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Email
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Jinqiao Economic Development Zone, Yi'an District, Tongling City, Anhui Province (within Donglian Town)
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