Description
Factory-Direct Hot Rolled Carbon Steel Coil — Every coil is rolled and tested in-house with full chemistry and mechanical reports before shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S235JR / S355JR / Q235B / SS400 / ASTM A36 Hot Rolled Carbon Steel Coil |
| Product Type | Steel Coil / Plate |
| Steel Grade | S235JR, S355JR, SAE1006, Q235B, SS400, ASTM A36, Q195–Q345, SGCC, CGCC, TDC51D+ZM, TDC52D, TS350GD, TS550GD, DX51D+Z |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Section Shape | Coil / Plate |
| Thickness | 2.0 mm – 25 mm |
| Width | 600 mm – 1500 mm |
| Technique | Hot Rolled / Cold Rolled |
| Surface Treatment | Dull finish, Oiled |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Skin Pass | Yes |
| Application | Shipbuilding, Boiler, Container manufacturing, Pipe making, Cold rolled product feedstock, Construction, Transport, Gas containers, Appliances |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Pipe Manufacturing | ERW and SSAW feedstock for structural hollow sections and fluid transport tubes |
| Shipbuilding & Pressure Vessel | Boiler plate, container plate, deck structures |
| Construction & Infrastructure | Building frames, scaffolding tubes, transport equipment chassis |
| Cold Rolling Feedstock | Galvanized coil and cold rolled sheet production |
| General Engineering | Gas containers, appliance shells, small tool blanks |
Grade Equivalence Across EN, ASTM, JIS, and GB Costs More Than You Think
S235JR, SS400, ASTM A36, and Q235B are not interchangeable on paper — and customs officers know it.
Buyers often assume these mild steel grades are equivalent because their yield strengths sit in a similar range. In practice, chemical composition limits, impact testing temperatures, and elongation requirements differ across EN 10025, ASTM A36, JIS G3101, and GB/T 700. A coil stamped S235JR shipped to the EU without a proper EN 10204 3.1 certificate gets held at the port, regardless of whether the steel physically meets the order. We have seen entire shipments delayed because the mill test certificate referenced GB/T 700 Q235B instead of EN 10025 S235JR — the material was fine, but the documentation was not. [NEED_CITE: steel grade equivalence between EN 10025 and ASTM A36]
Matching Coil Width and Thickness to Pipe Making and Fabrication Lines
A Hot Rolled Carbon Steel Coil S235JR S355JR SS400 A36 Supplier must deliver width and thickness that match the customer’s slitting and forming line without secondary trimming. Our 600–1500 mm width range with ±1% tolerance covers standard ERW pipe mill feed from 2-inch to 16-inch OD, while the 2.0–25 mm thickness span handles both light-gauge structural tubes and heavy-wall pressure vessel shells. Skin pass treatment improves surface flatness for decoiling and feeding, reducing edge wave defects that cause weld line misalignment on high-speed pipe mills.
Structural Compliance and Certification for Regulated Markets
Engineering projects governed by EN 1993 or AISC require traceable material certification from melt to finished coil. Hot rolled coils in S355JR for European structural work must carry CE marking per EN 10210 or EN 10219, with chemistry and mechanical test results traceable to heat number. For North American projects, ASTM A36 or A572 coils need mill test certificates conforming to ASTM A6/A6M requirements. Our in-house physical and chemical laboratory tests every heat before release, and third-party inspection through SGS or BV is arranged on request for buyers who need independent verification. [NEED_CITE: EN 10219 cold-formed hollow section certification requirements]
Steel Grade Selection: S235JR vs. S355JR vs. Q235B vs. SS400
The S-series (EN 10025) and Q-series (GB/T 700) represent different national standard systems. S235JR and Q235B occupy similar yield strength positions in their respective systems but differ in phosphorus and sulfur limits and Charpy impact test conditions. S355JR offers higher yield strength for load-bearing frames and bridge components where S235JR would require thicker sections. SS400 (JIS G3101) and ASTM A36 (ASTM A36/A36M) are general structural grades widely accepted in Japan and the US respectively. Hot rolled carbon steel coils in these grades share similar weldability and formability, but the correct grade must be specified on the purchase order and confirmed on the mill test certificate to avoid rejection at destination.
The Hidden Cost of Wrong Grade Documentation on a Hot Rolled Carbon Steel Coil Order
Ordering S355JR and receiving Q345B with a GB-only mill test certificate means the coil cannot be used on an EU-regulated project without re-certification — which is usually impossible after the material has left the mill. Structural engineers signing off on EN 1993 compliance will reject material without EN 10204 3.1 documentation, regardless of actual chemistry. The cost is not just the replacement coil; it is the idle crane, the delayed erection schedule, and the re-inspection fees. [NEED_CITE: EN 10204 inspection document types for steel products]
Why Procurement Teams Source Hot Rolled Carbon Steel Coil From Us
Every Hot Rolled Carbon Steel Coil S235JR S355JR SS400 A36 Supplier claims full certification, but few operate their own physical and chemical laboratory to verify every heat before shipment. We participated in drafting China’s cold-formed steel industry standards in 2018 and hold 41 invention patents — not for marketing, but because we roll and test in the same facility. Our 2,800+ specification coverage means you can source S235JR coil for pipe making and S355JR plate for structural frames in a single order with unified documentation. Full international certifications including ISO 9001:2015, Lloyd’s CE (EN 10210/EN 10219), and Singapore FPC clear customs in the EU, Middle East, and Southeast Asia. Custom slitting to non-standard widths, cut-to-length, and professional container loading with anti-damage measures are standard, not extras.
Documentation & Compliance
- Mill Test Certificate (EN 10204 3.1) documenting S235JR, S355JR, SS400, ASTM A36, or Q235B chemical composition and mechanical properties per heat number
- CE certificate per EN 10210 / EN 10219 for structural steel coils exported to EU member states
- ISO 9001:2015 quality management certificate covering hot rolled and cold rolled coil production
- SGS or BV third-party inspection report available for pre-shipment verification of chemistry, dimensions, and surface quality
- Material traceability from slab heat number through rolling schedule to finished coil, stamped on each bundle
- Full customs documentation including packing list, bill of lading, and certificate of origin for destination clearance
Packaging, Loading & Delivery
- Hot rolled coils in S235JR and S355JR bundled with minimum three steel strips and edge protectors to preserve oiled dull finish during ocean transit
- 600–1500 mm width coils loaded vertically or horizontally in 20ft and 40ft containers depending on coil weight and destination port crane capacity
- Custom slitting to buyer-specified widths with individual coil identification tags showing grade, heat number, thickness, and width
- Surface protection: oiled finish applied at the mill to prevent flash rust during transit; galvanized coils (SGCC, DX51D+Z) wrapped in moisture-barrier paper
- Coil weight and dimensions optimized for container payload to minimize freight cost per ton for pipe making feedstock orders
- FOB, CIF, and DDP shipping terms available with full tracking from Jinan mill to destination port or project site
Start Your Hot Rolled Carbon Steel Coil Inquiry With Verified Documentation
Submit your required grade (S235JR, S355JR, SS400, ASTM A36, Q235B), thickness, width, quantity, and destination port to receive a detailed quotation with mill test certificate sample and production lead time. Non-standard widths, custom slitting, and cut-to-length requests are reviewed within 12 hours. Third-party inspection (SGS/BV) and CE certification confirmation are arranged before production begins.
Request Hot Rolled Carbon Steel Coil Quote With Mill Test Certificate
Send your specifications and destination to receive pricing, documentation samples, and confirmed lead times.
Tel: +86 531 8573 6315 | Mobile/WhatsApp/WeChat: +86 188 5315 7756 | Email: admin@sdxjypipe.com
Frequently Asked Questions
Q: How do S235JR, S355JR, SS400, ASTM A36, and Q235B compare across EN, ASTM, JIS, and GB standards?
A: These grades belong to different national standard systems — EN 10025 (S235JR, S355JR), ASTM A36 (ASTM A36/A36M), JIS G3101 (SS400), and GB/T 700 (Q235B). While their yield strength ranges overlap, chemical composition limits, impact testing temperatures, and elongation requirements differ. We provide mill test certificates referencing the exact standard specified on your purchase order, and third-party inspection (SGS/BV) is available for independent verification.
Q: What documentation is provided for EU and regulated-market imports?
A: Every Hot Rolled Carbon Steel Coil S235JR S355JR SS400 A36 shipment includes EN 10204 3.1 mill test certificates with full chemical and mechanical test results traceable to heat number. CE marking per EN 10210/EN 10219 is provided for EU structural applications. ISO 9001:2015, Lloyd’s CE, and Singapore FPC certifications are maintained for regulated-market clearance.
Q: Can you supply non-standard widths, lengths, or coil weights?
A: Yes. Standard width range is 600–1500 mm, and custom slitting to buyer-specified widths is available. Cut-to-length sheets can be produced from coil. Coil weight is optimized for container loading based on your order quantity and destination port requirements.
Q: What surface treatment options are available for pipe making versus fabrication?
A: Hot rolled coils are supplied with dull finish and oiled surface treatment to prevent flash rust during transit and storage. For pipe making feedstock, oiled hot rolled surface is standard. Galvanized coils (SGCC, DX51D+Z, TDC51D+ZM) are available for applications requiring corrosion protection. Cold rolled options with skin pass treatment provide improved surface flatness for precision fabrication.
Q: How are coils packed to prevent edge damage and moisture during ocean freight?
A: Coils are bundled with minimum three steel strips and edge protectors. Oiled finish provides short-term rust prevention. Galvanized coils are wrapped in moisture-barrier paper. Loading is optimized for container type (20ft or 40ft) based on coil weight and dimensions to prevent shifting during transit.
