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Help CenterCarbon Steel Coil SS400 Q235B 2.5-16mm Thickness Hot Rolling 400MPa Min Yield Strength Black Surface for Bending
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At Hemaokang Steel (Shandong) Co., Ltd., we supply high-performance carbon steel coils that meet the demanding needs of modern fabrication and construction industries. This hot rolled carbon steel coil in SS400 and Q235B grades offers a reliable combination of strength, formability, and cost efficiency. With a thickness range from 2.5mm to 16mm and a minimum yield strength of 400MPa, it is engineered for bending applications where consistency and durability matter most. As a manufacturer committed to quality, we ensure every coil is produced under strict process control and is ready for further processing in your facility.
Product Highlights
The SS400 and Q235B carbon steel coil combines mechanical strength with excellent bending performance. The hot rolling process refines the grain structure of the steel, improving toughness and ductility, which makes the material easy to cut, stamp, bend, and weld. The black surface is a natural oxide layer formed during hot rolling, offering a clean and consistent finish that is suitable for further coating or painting processes. This coil is a versatile raw material for manufacturers who need predictable performance in structural and general engineering applications.
Key Benefits
- High Strength: Minimum yield strength of 400MPa provides reliable load-bearing capability for structural components.
- Excellent Bending Performance: Good ductility allows tight bending without cracking, even in cold forming processes.
- Wide Thickness Range: From 2.5mm to 16mm, suitable for light, medium, and heavy fabrication work.
- Black Surface Option: The natural mill finish is ideal for applications where the material will be painted, oiled, or further treated.
- Hot Rolled Quality: The rolling process improves mechanical consistency and reduces internal stress compared to cold rolled alternatives.
- Cost Effective: SS400 and Q235B are widely accepted grades that offer a balanced combination of price and performance.
- Wide Compatibility: Can be processed with standard equipment used by metal fabricators, coil processing lines, and construction suppliers.
- Export Ready: Supplied in coils with protective packaging, backed by our export experience from Qingdao port.
Technical Specifications
| Material | Carbon Steel |
| Standard Grades | SS400, Q235B |
| Thickness | 2.5mm - 16mm |
| Width | Customizable (available upon request) |
| Surface | Black (hot rolled oxide finish) |
| Processing | Hot Rolling |
| Min Yield Strength | 400MPa (as specified) |
| Application | Bending, forming, structural fabrication |
Detailed Characteristics
Hot rolled carbon steel coil is produced by heating steel slabs above the recrystallization temperature and then rolling them into coils. This process creates a material with excellent consistency and improved mechanical properties. For SS400 and Q235B, the chemical composition and mechanical properties are well recognized in both Chinese and international standards. The 400MPa minimum yield strength requirement in this specification supports designs that demand stronger components than ordinary low-carbon steel. Bending operations are particularly tolerant because the material retains good elongation and ductility. Whether you are manufacturing purlins, frames, brackets, enclosures, or general metal parts, this coil offers the structural support and workability required to achieve accurate bends and robust final products.
The black surface is characteristic of hot rolled coils that have not been pickled or oiled. This surface condition is often preferred for applications where the steel will be further painted or coated, as the oxide layer provides a good base for adhesion when properly prepared. For projects requiring a bright finish, additional surface treatment processes such as pickling can be arranged upon request. We understand that different buyers have varying requirements, so width and packaging can be customized to suit your specific handling and production needs.
Application Areas
- Structural steel components for buildings and warehouses
- Bent profiles, channels, and angle sections
- Automotive and trailer manufacturing parts
- General metal fabrication and machinery frames
- Storage racks and material handling equipment
- Pipe and tube manufacturing from coiled strips
- Agricultural equipment and implements
- Fencing, guardrails, and infrastructure projects
Quality Assurance and Company Support
Hemaokang Steel (Shandong) Co., Ltd. is an export-focused supplier with an annual export value in the range of US$50 million to US$100 million. Our team of 51 to 100 employees operates with a clear focus on reliable processing, inspection, and logistics coordination. All products are supplied in accordance with our ISO9001 quality management system, which ensures traceable procedures from raw material selection to final shipment. We serve markets across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, Asia, and Europe, giving us a solid understanding of international packaging standards and documentation requirements.
When you order from us, you receive more than just a coil of steel. We provide detailed specifications, responsive communication, and support for your commercial documentation needs. Goods are shipped from Qingdao port, one of China's major international ports, with careful loading and protective packaging to prevent damage during transit. Our goal is to be a long-term steel partner who helps your production stay efficient and your supply chain remain stable.
Frequently Asked Questions
Q1: What are the available thicknesses for this coil?
Our hot rolled carbon steel coil is available from 2.5mm to 16mm. Other thicknesses can be discussed based on the mill production schedule and minimum order requirements.
Q2: Can the coil width be customized?
Yes, coil width is customizable in terms of slit widths. Please provide your exact width requirement to our sales team, and we will confirm feasibility and delivery time.
Q3: Is this steel suitable for bending?
Absolutely. The SS400 and Q235B grades are designed to deliver good ductility and consistent mechanical properties, making them well suited for bending, forming, and stamping operations.
Q4: What is the minimum order quantity (MOQ)?
The MOQ depends on the specific grade, thickness, width, and packaging requirements. Please contact our team, and we will provide a clear quotation based on your project needs.
Q5: Do you provide any quality certifications?
We operate under an ISO9001 quality management system. Mill test certificates and inspection reports can be provided according to your requirements before shipment.
Q6: How is the coil packaged for export?
Coils are packed with waterproof paper, steel strapping, and suitable edge protection to ensure safe ocean transportation. Packaging can be customized for rail or truck transport as well.
Q7: What are the main shipping ports?
We ship mainly from Qingdao port, which ensures convenient access to international shipping routes and efficient export logistics.
Q8: Can I request a sample before placing a bulk order?
Sample orders and trial orders are welcome. Please discuss your product applications with our team, and we will work out the most practical way to evaluate the material.
With a strong focus on product quality, global supply capability, and responsive service, Hemaokang Steel is ready to support your steel procurement needs. Choose our SS400/Q235B hot rolled carbon steel coil for your next bending or structural project, and benefit from a product that combines strength, workability, and dependable delivery. Contact us today to request a quotation or more detailed specifications.
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