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Help CenterBridge Construction Steel Plate＆Steel Sheet & Plate， GB/T 714, GB/T 3274 ， Q345q, Q345qC, Q345qD, Q345qE, Q370q, Q420q
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Bridge Construction Steel Plate＆Steel Sheet & Plate， GB/T 714, GB/T 3274 ， Q345q, Q345qC, Q345qD, Q345qE, Q370q, Q420qNegotiableMOQ: 3 Metric Tons -
Steel Round Bar＆Round Steel，Q235, Q355, SAE1020, SAE1045, A36, C45NegotiableMOQ: 5 Metric Tons
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Steel Round Bar＆Round Steel，Q235, Q355, SAE1020, SAE1045, A36, C45NegotiableMOQ: 3 Metric Tons
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1. Product Name: Bridge Structural Steel Plate, Bridge Steel Plate, Q345q/Q370q/Q420q Bridge Plate, Weathering Bridge Steel, Z-Direction Performance Bridge Plate
2. Standards: GB/T 714-2015, GB/T 47031, ASTM A709, EN 10025-3
3. Material Grades:
- Low Strength: Q235qB/C/D
- Medium Strength: Q345qB/C/D/E, Q370qC/D/E
- High Strength: Q420qC/D/E, Q460q, Q500q, Q690q
- Weathering Type: Q345qNH, Q370qNH, Q420qNH
- Z-Direction: Q345qD-Z25, Q370qE-Z35 (lamellar tearing resistance)
4. Categories:
- By Strength: 235/345/370/420/460/500/690MPa Grade
- By Toughness: B(+20℃), C(0℃), D(-20℃), E(-40℃) Impact Grade
- By Process: TMCP, Normalized(N), TMCP+Tempering, Quenched & Tempered
- By Application: Main Girder Plate, Deck Plate, Pier Plate, Joint Plate, Stiffener Plate
5. Size Range:
- Thickness: 6mm–150mm (Common: 8–100mm)
- Width: 1500–3200mm (Common: 1800–2500mm)
- Length: 6000–18000mm (Custom & Cut-to-Length Available)
- Form: Single Rolled Plate, Sheared Plate, Medium & Heavy Plate
6. Production Process:
- Continuous Cast Billet → Heating → TMCP Rolling → Cooling → Straightening → Cutting → UT Inspection → Heat Treatment → Finishing
- Z-Direction Steel: Strict S&P Control, Ca Treatment, Segregation Improvement, Ensure Through-Thickness Ductility
7. Surface Conditions:
- Black Mill Finish, Shot Blasted, Painted/Coated
- No Cracks, Folds, Scabs, Laminations, Inclusions, Embedded Scale
- Defect Depth ≤ 1/2 Thickness Tolerance, Smooth Ground Areas
8. Performance Features:
- High Strength & Toughness, Stable Low-Temperature Impact (-40℃ Qualified)
- Excellent Weldability, Low Crack Sensitivity (Pcm ≤ 0.22%)
- Superior Fatigue Resistance (≥2,000,000 Cycles Without Cracking)
- Atmospheric/Marine Corrosion Resistance (Weathering Grade), Z-Direction Lamellar Tearing Resistance
- Good Flatness, Uniform Thickness, Dense Internal Structure, UT Qualified
9. Applications:
- Highway/Railway Bridges: Main Girders, Decks, Piers, Caps, Bearing Plates
- Sea/River Crossings: Steel Box Girders, Trusses, Joint Plates, Stiffeners
- Urban Elevated Roads: Steel Box Girders, Crash Barriers, Support Structures
- Heavy-Duty Bridges: Railway, Combined Road-Rail, Long-Span Suspension/Cable-Stayed Bridges
10. Packing & Transportation:
- Wooden/Steel Pallets + Moisture-Proof Film + Steel Strapping
- Export: Container/Bulk Vessel, Moisture, Pressure & Impact Resistant
- Marking: Grade, Size, Heat No., Batch No., Quality Certificate No.
11. Quality Requirements:
- Yield/Tensile/Elongation/Impact Meet GB/T 714
- Z-Direction Reduction of Area ≥25%/35% (Z25/Z35)
- 100% UT Inspection, No Laminations, Flakes, Cracks
- MTC, UT Report & Mechanical Test Report Available
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