GNEE STEEL Successfully Delivers High-Performance Q345qE Steel for Russia's International Airport Channel Sea-Crossing Bridge
GNEE STEEL has successfully delivered the first batch of customized high-performance Q345qE steel for the key structural materials of the channel sea-crossing bridge project at Russia's international airport. This order required overcoming stringent technical requirements and high production challenges. Professional testing confirmed that the steel's performance significantly exceeds the project design standards, particularly excelling in low-temperature impact toughness and yield-to-tensile strength ratio.
As the primary access route for the airport, the sea-crossing bridge imposes exceptionally demanding technical requirements on its structural materials. The selected Q345qE-grade bridge steel plate meets multiple extreme performance criteria:
- Transverse & longitudinal tensile properties fully comply with standards.
- Low-temperature impact toughness at -40°C achieves ≥120J in both transverse and longitudinal impact tests.
- Yield-to-tensile strength ratio is strictly controlled to ≤0.85 to ensure safety under extreme loads such as strong winds and earthquakes.
Upon receiving the order, GNEE STEEL's technical center swiftly formed a cross-disciplinary team to address industry challenges, including optimizing core microstructure and surface performance in thick plates. This breakthrough provided critical technical support for project advancement.
The experience and data gained from this high-performance Q345qE steel project serve as valuable technical reserves for future major infrastructure projects in harsh environments, particularly in cold regions and large-span bridges. Moving forward, GNEE STEEL will further enhance production capacity and delivery efficiency to offer superior products and services to clients.
What is the steel Q345qE?
Q345qE under GB/T 714-2008 standard is a bridge steel grade. As a leading supplier and exporter, we can supply Q345qE hot rolled plates with thickness up to 100mm. Welcome to contact us email: alloy@gneesteelgroup.com if you are interested in our bridge steel Q345qE plate.
Q345qE is a low-alloy high-strength structural steel with a yield strength between 345 MPa and 400 MPa. This steel has good low-temperature impact toughness and, due to its high strength, light weight, and ease of processing, is widely used in various building structures, such as bridges, high-rise buildings, and factories.
Q345qE steel properties
Q345qE steel has high strength, toughness and withstands the load and impact of locomotives, and must have good fatigue resistance, certain low temperature toughness and atmoSPHEric corrosion resistance. Low notch sensitivity.
Q345qE steel chemical composition (%)
| Grade | C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | Mo | N | Als |
| Q345qE | ≤0.18 | ≤0.55 | 0.90-1.70 | ≤0.020 | ≤0.010 | ≤0.06 | ≤0.08 | ≤0.03 | ≤0.80 | ≤0.50 | ≤0.55 | ≤0.20 | ≤0.012 | ≥0.015 |
Q345qE steel mechanical properties
| Grade | Yield strength(MPa) min for Thickness in mm | Tensile strength min. | Elongation | V-type impact test | ||
| ≤50 | >50≤100 | Mpa | % min | Test temperature ℃ | Impact absorption energy KV₂/J | |
| Q345qE | 345 | 335 | 490 | 20 | 0 | 47 |
Applications of Q345qE Steel Plate
Q345qE steel bridge plate is a specialized thick steel plate designed for manufacturing bridge structural components. It is produced using dedicated carbon steel and low-alloy steel grades for bridge construction. Q345qE steel is widely used in construction due to its high strength, excellent toughness, and corrosion resistance.
Key applications include:
- Bridge construction – widely used in main girders, bridge decks, and support structures due to its superior mechanical properties.
- High-rise buildings – commonly employed as primary load-bearing components in reinforced concrete structures.
- Industrial plant construction – serves as a major material for large-scale support structures.
The material's exceptional performance makes it ideal for critical infrastructure projects requiring durability and reliability under demanding conditions.
GB/T 714 Q345qE bridge steel plate and sheet are delivered in hot rolled, controlled rolled, normalized or normalized rolled condition. As a leading supplier of Q345qE bridge steel, we can supply deep processing service like cutting, welding, drilling, grinding and heat treatment.
