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Help CenterHot Rolled Carbon Steel Coil ASTM A572 Gr50 4-12mm for Bridge Construction
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Hemaokang Steel (Shandong) Co., Ltd. is proud to offer premium Hot Rolled Carbon Steel Coil ASTM A572 Gr50 in thicknesses from 4 to 12 mm, specifically engineered for demanding bridge construction projects. Our coils combine high strength, excellent weldability, and consistent dimensional accuracy to meet the rigorous requirements of modern infrastructure. With ISO9001 certification and annual export value exceeding US$50 million, we ensure reliable quality and on-time delivery for global customers.
This grade is widely recognized for its superior yield strength and toughness, making it ideal for load-bearing components in bridges, buildings, and heavy machinery. The hot-rolled process delivers a uniform microstructure and scale-free surface, ready for further fabrication. Whether you need standard lengths or custom widths, we provide flexible solutions backed by decades of industry expertise.
Key Features & Technical Specifications
- High Strength-to-Weight Ratio: Minimum yield strength of 345 MPa (50 ksi) enables lighter structural designs without compromising safety.
- Excellent Weldability: Low carbon equivalent (CE) value (≤0.45%) ensures easy welding with standard techniques, reducing fabrication costs.
- Consistent Mechanical Properties: Tensile strength ranges from 450 to 620 MPa, with elongation ≥18% in 200 mm gauge length.
- Dimensional Precision: Thickness tolerance meets ASTM A568/A568M requirements, with camber < 1 mm per 1000 mm length.
- Superior Surface Quality: Hot-rolled finish with minimal scale, suitable for painting, galvanizing, or direct use after cleaning.
- Wide Availability: Standard widths from 1000 mm to 2500 mm, coils up to 30 tons per unit, or cut-to-length plates.
Mechanical & Chemical Properties (Typical)
| Property | Value | Standard |
| Yield Strength (min) | 345 MPa (50 ksi) | ASTM A572 |
| Tensile Strength | 450–620 MPa | ASTM A572 |
| Elongation (in 200 mm) | ≥18% | ASTM A572 |
| Carbon (C) | ≤0.23% | ASTM A572 Gr50 |
| Manganese (Mn) | ≤1.35% | ASTM A572 Gr50 |
| Phosphorus (P) | ≤0.04% | ASTM A572 |
| Sulfur (S) | ≤0.05% | ASTM A572 |
Advantages for Bridge Construction
- Enhanced Structural Integrity: High yield strength reduces the number of beams and supports needed, lowering material and labor costs.
- Fatigue Resistance: Optimized grain structure withstands cyclic loading from traffic and wind, extending bridge lifespan.
- Weathering Option: Can be supplied with improved corrosion resistance for exposed environments (request weathering grade variant).
- Compliance with Global Standards: Meets AASHTO M270 and other bridge-specific specifications on request.
Company & Production Capabilities
Hemaokang Steel (Shandong) Co., Ltd. was established in 2025 and has quickly grown to a team of 51–100 skilled professionals. Our annual export value ranges from US$50 million to US$100 million, serving markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We are ISO9001:2015 certified, ensuring strict quality control from raw material sourcing to final packaging. Our location in Liaocheng, Shandong — a major steel production hub in China — allows us to access competitive pricing and fast logistics.
Every coil is tested in our in-house laboratory for mechanical properties, chemical composition, and dimensional accuracy. We provide mill test certificates (MTC) with each shipment, traceable to the original heat number. Our commitment to excellence has earned us long-term partnerships with contractors and fabricators worldwide.
Frequently Asked Questions (FAQ)
- What is the minimum order quantity (MOQ) for this coil? Our standard MOQ is 25 tons per item, but smaller quantities are available upon request for trial orders.
- Can you provide custom widths or lengths? Yes, we offer slitting to custom widths (min 500 mm) and cut-to-length plates up to 12 meters. Please specify your requirements.
- What surface treatment is available? Standard is hot-rolled black finish. Options include pickled and oiled, shot blasting, or primer coating (additional cost).
- Is this grade suitable for welding in field conditions? Absolutely. With low carbon equivalent, it can be welded using common processes (SMAW, GMAW, FCAW) without preheat for most thicknesses below 20 mm. For thicker sections, consult our technical team.
- Do you have experience exporting to my country? We ship to over 30 countries, including USA, Canada, Germany, UAE, Nigeria, and Australia. We handle all documentation for customs clearance.
- What is the typical lead time? For standard sizes, 15–20 days after receipt of deposit. Custom orders may take 25–30 days.
- How is the coil packed for overseas shipment? Each coil is wrapped with waterproof paper, steel strapping, and protected by edge guards. For container loading, we use steel frames or wooden pallets as needed.
- Can you provide third-party inspection? Yes, we welcome inspections by SGS, BV, or other accredited agencies at buyer’s cost.
Build your bridges with confidence. Contact Hemaokang Steel today for a competitive quotation on ASTM A572 Gr50 hot rolled coils. Our dedicated sales team will respond within 24 hours with technical data, shipping options, and payment terms. Let’s strengthen your next project together.
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