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Help CenterCarbon Steel Coil for Shipbuilding ASTM A131 Grade A Hot Rolled 6-25mm
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Hemaokang Steel (Shandong) Co., Ltd., established in 2025 with an annual export value of US$50 million to US$100 million and a team of 51-100 experienced professionals, is proud to offer premium Carbon Steel Coil for Shipbuilding ASTM A131 Grade A Hot Rolled 6-25mm. As an ISO9001-certified supplier, we understand the critical demands of the maritime industry and deliver steel coils that meet rigorous international standards. Our product combines excellent strength, weldability, and toughness, making it an ideal choice for ship hull construction, offshore platforms, and marine structures. With a global footprint spanning North America, South America, Europe, Asia, Africa, and Oceania, we ensure reliable supply and consistent quality.
This ASTM A131 Grade A carbon steel coil is specifically designed for shipbuilding applications where structural integrity and resistance to harsh marine environments are paramount. The hot-rolled process ensures uniform mechanical properties and a smooth surface finish, while the thickness range of 6-25mm offers flexibility for various plate and structural requirements. Below, we highlight key features, technical specifications, and the tangible benefits our product brings to your shipbuilding projects.
Key Features & Technical Specifications
- Material Grade: ASTM A131 Grade A – a standard carbon steel grade for ship hull structures, offering good strength and weldability.
- Processing: Hot rolled, ensuring consistent thickness, improved ductility, and reduced internal stresses.
- Thickness Range: 6mm to 25mm, tailored for shipbuilding plates and structural components.
- Width Options: Standard widths from 1000mm to 2000mm, with custom widths available upon request.
- Surface Quality: Smooth, scale-free surface after hot rolling, suitable for further processing like cutting, welding, or painting.
- Mechanical Properties: Yield strength ≥ 235 MPa, tensile strength 400–520 MPa, elongation ≥ 22% (typical values for Grade A).
- Chemical Composition: Carbon ≤ 0.21%, Manganese ≤ 2.5%, Phosphorus ≤ 0.035%, Sulfur ≤ 0.035% (meets ASTM A131 limits).
- Certification: ISO9001 quality management system ensures traceability and consistent production.
- Application: Ship hulls, bulkheads, decks, offshore platforms, and marine equipment.
| Parameter | Specification |
|---|---|
| Thickness | 6 – 25 mm |
| Width | 1000 – 2000 mm (customizable) |
| Standard | ASTM A131 |
| Grade | Grade A |
| Yield Strength (min) | 235 MPa |
| Tensile Strength | 400 – 520 MPa |
| Elongation (min) | 22% |
| Surface Treatment | Hot rolled, pickled or oiled optional |
Our Carbon Steel Coil for Shipbuilding offers distinct advantages: it complies fully with ASTM A131 requirements, ensuring the material can withstand the dynamic loads and corrosive conditions of marine environments. The hot-rolled structure provides excellent formability, making it easy to cut, bend, and weld during fabrication. Additionally, the wide thickness range allows you to select the exact gauge needed for different parts of a vessel – from thinner plates for superstructures to thicker plates for keel and frames. By choosing our product, you reduce scrap loss and improve production efficiency.
We at Hemaokang Steel are committed to delivering value beyond the product. With an annual export value exceeding US$50 million and a strong presence in over 10 major markets, we have the capacity to handle large orders with consistent quality. Our ISO9001 certification ensures that every coil is tested for chemical composition, mechanical properties, and dimensional accuracy before shipment. We also offer flexible packaging options (bundled, in coils with steel strapping, or wrapped in waterproof paper) to protect the steel during transit.
Trust Hemaokang Steel as your reliable partner for shipbuilding materials. Our experienced team, modern production facilities, and customer-centric approach guarantee that you receive the right product on time. Contact us today to discuss your specific requirements – we are ready to provide competitive pricing, technical support, and tailored solutions for your projects.
Frequently Asked Questions (FAQ)
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Q: What types of ships is this ASTM A131 Grade A coil suitable for?
A: This grade is commonly used for hull structures of cargo ships, tankers, bulk carriers, offshore supply vessels, and smaller fishing boats. It meets the basic strength requirements for most conventional shipbuilding applications. -
Q: Can the coil be used for other marine structures beyond ships?
A: Yes, it is also suitable for offshore platforms, marine terminals, and port equipment where carbon steel with good weldability is required. -
Q: What is the minimum order quantity (MOQ)?
A: Our MOQ is typically 25 metric tons per order, but we can accommodate smaller trial orders for new customers. Please contact us for specific details. -
Q: How long does the delivery take?
A: Standard delivery time is 15–25 working days after order confirmation, depending on the quantity and specification. Rush orders can be arranged with prior agreement. -
Q: Do you provide third-party inspection certificates?
A: Yes, we can arrange inspection by SGS, BV, or other recognized third-party agencies at the buyer's request. Our own ISO9001 system also provides mill test certificates. -
Q: Is the coil edge suitable for welding?
A: The coil is supplied with mill edge (natural edge) as standard. If you need slit edge for easier welding, we can process it upon request at an additional cost. -
Q: Can you supply coils with thickness over 25mm or below 6mm?
A: While our standard range is 6-25mm, we can source other thicknesses from our partner mills. Please inquire for non-standard sizes. -
Q: What packaging is provided to prevent rust during sea freight?
A: We offer standard packaging with steel strapping, plus optional waterproof paper wrapping and rust-proof oil coating. For long voyages, we recommend additional anti-rust protection.
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