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Help CenterHot Rolled Carbon Steel Coil for Pipeline Welding and Pressure Vessel Manufacturing, SS400 S235JR, 4-16mm
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Hemaokang Steel (Shandong) Co., Ltd. is an export-oriented steel supplier based in Liaocheng, Shandong, China. We supply hot rolled carbon steel coil for pipeline welding and pressure vessel manufacturing, with SS400 and S235JR grades available in thicknesses from 4 mm to 16 mm. Our team understands that fabricators and project owners need reliable material, responsive service, and clear documentation. This product page explains how our coil is produced, what it can be used for, and how we make international purchasing efficient.
What Is Hot Rolled Carbon Steel Coil?
Hot rolled carbon steel coil is a flat steel product manufactured by heating rolled slabs above recrystallization temperature and then passing the material through a rolling mill to achieve the desired thickness. The hot rolling process enhances the steel grain structure and ductility while producing a surface condition suitable for many industrial uses. This coil is widely used in general fabrication, structural work, piping, tanks, and vessel components. It is a practical and cost-effective material because it can be cut, slit, formed, and welded with standard equipment.
The coil is supplied in thicknesses such as 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, and 16 mm. Width can be customized according to the requirements of your downstream process. Additional operations, including slitting, cut-to-length, and edge trimming, can be completed before export. This flexibility makes the material suitable for bending, rolling, flange forming, and welding in a professional fabrication workshop.
Available Steel Grades
- SS400 - A structural carbon steel grade defined under JIS G3101. SS400 is recognized for its balanced tensile strength and broad usability in structural fabrication, tanks, frames, and machine parts. It is widely specified in projects that follow Japanese or Asian design practice.
- S235JR - A structural steel grade under EN 10025-2, commonly used in European and international projects. S235JR delivers good weldability and toughness and is suitable for load-bearing structures, pipe components, and many types of vessel components.
- Dual-grade support - Depending on the engineering design, the coil can be ordered to either standard. This flexibility simplifies procurement for international projects and helps buyers match material to local building codes.
Why These Grades for Pipeline Welding and Pressure Vessel Manufacturing?
Pipeline welding requires steel that can resist cracking during field welding and maintain strength under internal pressure. Pressure vessel manufacturing requires consistent plate thickness and mechanical behavior after bending and welding. SS400 and S235JR provide a balanced combination of tensile strength, ductility, and weldability. These grades also have predictable behavior when flame cut, drilled, or machined. Because both grades are accepted structural materials in many countries, designers and fabricators can source a single coil type for multiple parts.
- Good weldability reduces the risk of weld defects
- Stable strength values help with engineering calculations
- Uniform thickness supports accurate forming and fabrication
- Widely recognized grades facilitate inspection and certification
Mechanical Reference Values
| Parameter | SS400 | S235JR |
|---|---|---|
| Reference standard | JIS G3101 | EN 10025-2 |
| Delivered thickness | 4-16 mm | 4-16 mm |
| Yield strength | 245 MPa for thickness up to 16 mm | 235 MPa for thickness up to 16 mm |
| Tensile strength | 400-510 MPa | 360-510 MPa |
| Weldability | Good | Good |
Values shown are typical reference ranges. Mill test certificates and final inspection data can be supplied with the shipment.
Primary Applications
- Pipe and pipeline components that require welding and bending
- Pressure vessel shells, heads, and reinforcing plates
- Storage tanks for liquids and gases
- Steel structures for industrial buildings and platforms
- Heavy machinery frames, foundations, and supports
- General welded fabrications and metal components
In each application, the coil is processed into flat or shaped parts. Because SS400 and S235JR are established structural grades, engineers can calculate allowable stress according to recognized standards. The thickness range of 4-16 mm supports medium-duty load conditions while remaining practical for cutting and forming.
Custom Processing and Finishing
Hemaokang Steel can arrange a range of processing services before the material is loaded into containers. Slitting can reduce a wide coil to the exact strip width required for spiral pipe welding. Cut-to-length lines can deliver flat sheets or plates in specified dimensions for pressure vessel parts. Edge trimming and deburring can prepare edges for subsequent welding. If a customer needs a pickled or oiled surface for better forming and temporary rust protection, this option can be discussed with the sales team. For most projects, the standard hot rolled surface is sufficient and more economical.
Advantages of Using Coil Form
- Lower handling cost than individual plates in a project with large cutting requirements
- Flexible length selection, which reduces material waste
- Compact packing for economical sea freight
- Easier integration with automated feeding and cutting systems
- Consistent thickness and composition across the full coil
Quality Management and Inspection
Hemaokang Steel operates a quality management system certified to ISO9001. This certification covers our export sales, sourcing, production coordination, documentation, and customer communication. We keep order details centralized so that every coil is correctly specified before it leaves the production line. Mill test certificates are provided with shipment, and third-party inspection can be arranged at the mill or loading port. Common checks include surface condition, dimensional measurements, grade identification, and packaging verification.
Packaging and Shipping
All coils are prepared for international transport with moisture-resistant wrapping, steel strapping, edge protection, and clear identification tags. Each tag includes grade, heat number, thickness, width, coil number, and net weight. For break-bulk and container shipments from Qingdao, we coordinate vehicle positioning, loading supervision, and export documentation. This attention to packaging helps prevent damage during sea voyages and makes receiving inspection easier for the buyer.
Why Buy from Hemaokang Steel?
Hemaokang Steel is located in Liaocheng, Shandong, a region with strong steel processing and equipment manufacturing experience. Our company was established in 2025, but our management team has built a supply network that allows us to deliver competitive prices and consistent quality. We are active in many international markets, including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, Western Europe, and the domestic Chinese market. Our annual export value is between US$50 million and US$100 million, supported by 51-100 employees covering sales, logistics, inspection, and after-sales communication.
When you order from us, you receive a dedicated export team rather than a simple trading link. We help you confirm specifications, prepare samples or trial orders, coordinate third-party inspection, and plan delivery dates in line with your production schedule. We support both one-time purchases and contract-based supply programs. For urgent requirements, we give priority to material availability and loading planning.
Q: Can I order a small trial quantity before committing to a large volume?
A: Yes, trial orders are accepted. Please contact our sales team with the grade, thickness, and width you need, and we will arrange a suitable trial quantity for evaluation.
Q: Do you provide mill test certificates?
A: Yes, mill test certificates are provided with each shipment. Third-party inspection is available upon request and can be arranged before loading.
Q: What is the difference between SS400 and S235JR?
A: These are two structural steel grades from different standards. SS400 follows JIS G3101, while S235JR follows EN 10025-2. In practice, both weld well, but the final choice depends on your project design code.
Q: Can the coil be supplied in a custom width?
A: Yes. We can supply standard width coils or slit coils to a specified width. Please provide the required width, edge condition, and tolerance when making an inquiry.
Q: How is the coil packed for ocean export?
A: Coils are packed with waterproof wrapping, steel strapping, and protective edge guards. Each coil is marked with grade, heat number, dimensions, and net weight before loading.
Q: What is the lead time for hot rolled carbon steel coil?
A: Lead time depends on the grade, thickness, and processing work. Standard coils can be scheduled within a short period, while customized sizes may take longer. We confirm exact delivery time during the quotation process.
Q: Is this coil suitable for pressure vessel manufacturing?
A: It is suitable for pressure vessel components that are designed and manufactured according to the applicable code using SS400 or S235JR. For specific pressure-bearing duties, the project engineer must verify grade, thickness, and standard requirements.
Q: Which markets do you serve?
A: Our export sales cover North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, Western Europe, and Asia. We ship from Qingdao port with regular container and break-bulk options.
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