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Steel Plates for Bridge Construction - Mill Direct Supplier
China
Supplier's customization ability
- Drawing-based customization
- Sample-based customization
- Full customization
Minimum order quantity: 1 ton
Shipping total: To be negotiated
- Lead time:
- confirmed with the quotation
- Packaging:
- standard export packing
- Samples:
- available on request
Product details
Technical Specifications of Steel Plates for Bridge Construction
| Property | Parameter | Description |
|---|---|---|
| Product Name | Steel Plates for Bridge Construction | High-strength structural steel plates engineered for highway, railway, and cable-stayed bridge applications |
| Material Grade | ASTM A709 Gr.36/50/70W; EN 10025 S355J2+N; GB/T 714 Q345qD/Q420qE; JIS G3106 SM490Y | International equivalent grades available; weathering steel grades (Gr.50W, S355J0WP) for corrosion-resistant applications |
| Standard Compliance | ASTM A709/A709M; EN 10025-2/-5; GB/T 714-2015; JIS G3106; AASHTO M270 | Fully compliant with bridge design codes including AASHTO LRFD and Eurocode 3 |
| Chemical Composition (C) | ≤ 0.23% (max) | Low carbon content ensures superior weldability and toughness in bridge structures |
| Chemical Composition (Mn, Si, P, S) | Mn: 0.80–1.65%; Si: 0.15–0.50%; P: ≤ 0.025%; S: ≤ 0.015% | Controlled Mn/Si ratio enhances strength; ultra-low P/S minimizes brittleness and lamellar tearing risk |
| Chemical Composition (Cr, Ni, Mo, V) | Cr: ≤ 0.50%; Ni: ≤ 0.50%; Mo: ≤ 0.10%; V: ≤ 0.10% | Micro-alloying elements improve hardenability, fatigue resistance, and atmospheric corrosion resistance |
| Tensile Strength | 485–760 MPa (ASTM A709 Gr.50); 470–630 MPa (EN S355J2) | High tensile strength meets dynamic load and fatigue cycle requirements per AASHTO and Eurocode standards |
| Yield Strength | ≥ 345 MPa (Gr.50 / S355); ≥ 250 MPa (Gr.36 / S235) | Minimum yield strength guaranteed at specified thickness; Z-direction (Z35) grades available for through-thickness loading |
| Elongation | ≥ 18–21% (gauge length 200 mm) | Adequate ductility ensures energy absorption under seismic and impact loading conditions |
| Charpy Impact Toughness | ≥ 34 J at −20°C (Gr.50W); ≥ 27 J at −40°C (Q420qE) | Low-temperature impact toughness critical for bridges in cold climates; tested per ASTM A370 / EN ISO 148-1 |
| Thickness Range | 6 mm – 150 mm | Wider plates available for main girders and box girders; ultra-thick plates (>100 mm) for tower base connections |
| Width & Length | Width: 1,500–4,200 mm; Length: 6,000–18,000 mm | Custom cutting to net shape available; camber and flatness tolerance per EN 10029 Class C or ASTM A6 |
| Surface Finish | As-rolled (AR); Normalized (N); TMCP; Quenched & Tempered (QT) | TMCP process preferred for high-strength grades ≥ Q420q; shot-blast Sa 2.5 pre-treatment optional |
| Certification | CE Marking; Lloyd's Register; DNV GL; BV; CCS; Third-party mill test reports (EN 10204 3.1/3.2) | Full traceability with heat number, ladle analysis, and mechanical test certificates supplied per order |
| Application | Highway bridges, railway bridges, cable-stayed bridges, suspension bridges, steel box girders, orthotropic deck plates | Suitable for primary load-bearing members, stiffeners, diaphragms, and connection plates |
| Packaging | Bare bundle with steel strapping; rust-preventive oil coating; wooden dunnage for sea freight | Export seaworthy packaging available; edge protectors applied to prevent transit damage |
| MOQ | 25 metric tons per grade/thickness | Mixed grades accepted within one order; spot stock available for standard grades (S355J2, Q345qD) with lead time 7–15 days |
Steel Plates for Bridge Construction - Mill Direct Supplier
Steel plates for bridge construction serve as the structural backbone of modern infrastructure, bearing dynamic traffic loads, environmental stress, and decades of continuous service. Sourcing the right grade directly from a certified mill is not simply a procurement decision — it is an engineering imperative. Our mill-direct supply chain eliminates intermediary markups, ensuring that civil engineers, EPC contractors, and government procurement agencies receive certified structural plates that comply with ASTM A709, EN 10025-5, and GB/T 714 standards. Whether your project demands weathering steel for exposed superstructures, high-strength low-alloy (HSLA) plates for girder fabrication, or thick-section base plates for pier foundations, our production capabilities cover thickness ranges from 6 mm to 200 mm and widths up to 4,200 mm. Every plate ships with full mill test reports, third-party inspection options, and traceability documentation — giving your project team complete confidence from procurement through installation.
What Are Steel Plates for Bridge Construction?
Steel plates for bridge construction are flat-rolled, heavy-gauge structural steel products engineered to withstand combined static and dynamic loading in bridge superstructures, substructures, and deck systems. They are produced to tightly controlled chemical compositions and mechanical properties, typically featuring a minimum yield strength of 345 MPa (Grade 50) up to 690 MPa for high-performance applications, ensuring structural integrity across service lives exceeding 100 years.
Steel Plates for Bridge Construction — Technical Specifications
Our bridge-grade steel plates are produced under rigorous quality protocols. The table below summarizes the key mechanical and dimensional parameters available from our mill, covering the most commonly specified grades in international bridge projects.
| Parameter | Standard Grade (ASTM A709 Gr.50) | Weathering Grade (A709 Gr.50W) | High-Performance (HPS 70W) |
|---|---|---|---|
| Minimum Yield Strength | 345 MPa (50 ksi) | 345 MPa (50 ksi) | 485 MPa (70 ksi) |
| Tensile Strength Range | 450 – 620 MPa | 485 – 655 MPa | 585 – 760 MPa |
| Minimum Elongation (2 in.) | 21% | 21% | 19% |
| Thickness Range | 6 mm – 150 mm | 6 mm – 100 mm | 6 mm – 65 mm |
| Max Width | 4,200 mm | 4,200 mm | 3,500 mm |
| Charpy Impact (–12°C) | 34 J minimum | 34 J minimum | 48 J minimum |
| Applicable Standards | ASTM A709 / EN 10025-2 | ASTM A709 / EN 10025-5 | ASTM A709 / AASHTO M270 |
| Surface Finish | As-rolled / Shot-blasted | As-rolled / Shot-blasted | As-rolled / Primer-coated |
All plates undergo ultrasonic testing per ASTM A578 Level B upon request, and chemical composition is continuously monitored to maintain carbon equivalent (CE) values below 0.45 for optimal weldability — a critical parameter for field and shop fabrication of bridge girders and box sections.
Get a Competitive Quote for Steel Plates for Bridge Construction
Partner with a mill-direct supplier that understands the precision demands of bridge engineering. Share your project specifications — grade, thickness, quantity, and delivery schedule — and our technical sales team will respond with a tailored, cost-effective proposal within 24 hours. We support projects from feasibility through final delivery, including cut-to-size processing, third-party inspection coordination, and export documentation.
- 24/7 customer support available
- Free samples for quality evaluation
- Competitive pricing for bulk orders
- Professional technical consultation
Contact us today to get your free quote within 24 hours!
