Description
Factory-direct hot rolled coil supply — every S235JR, S355JR, SS400, and ASTM A36 batch ships with original mill test certificates and SGS-ready traceability from our Jinan production lines.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | S235JR / S355JR / Q235B / SS400 / ASTM A36 Hot Rolled Carbon Steel Coil |
| Product Type | Steel Coil |
| Steel Grade | S235JR, S355JR, SAE1006, Q235B, SS400, ASTM A36, Q195–Q345 |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Section Shape | Coil / Plate |
| Size Range | Width 600–1500 mm |
| Wall Thickness | 2.0–3.5 mm (2–25 mm range available) |
| 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, Pipe manufacturing, Construction, Transport, Gas containers, Appliances |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Pipe Manufacturing | ERW and SSAW pipe feedstock, oil and gas transmission line blanks |
| Shipbuilding & Container | Deck plates, hull structural sheets, container floor and wall panels |
| Construction & Infrastructure | Building frames, scaffolding planks, purlin blanks, bridge gusset plates |
| Industrial Equipment | Boiler shells, gas container bodies, conveyor frames, machinery base plates |
| Transport & Appliances | Truck body panels, trailer floor sheets, appliance housing blanks |
What Negative Tolerance Really Costs on a Coil Slitting Order
A coil that measures 2.8 mm at the edge but 2.5 mm at the center will ruin every cut piece downstream.
I watched a Dammam workshop return an entire container of Q235B hot rolled coil because the slitting line kept producing blanks below minimum gauge. The supplier had quoted on theoretical weight, but actual thickness ran eight percent under spec. Every piece the workshop cut failed their client’s acceptance test. The re-rolling bill, the return freight, the idle press time — all of it traced back to one unchecked tolerance claim. [NEED_CITE: hot rolled coil thickness tolerance standards per ASTM A568 and EN 10051]
When you source a Hot Rolled Carbon Steel Coil Supplier without verified ±1% tolerance control, the hidden cost is never the steel price. It is the scrapped blanks, the delayed project milestones, and the reputation hit when your end client finds out.
Matching Coil Grades to Structural and Fabrication Demands
A Hot Rolled Carbon Steel Coil Supplier covering S235JR through S355JR, SS400, and ASTM A36 in a single order lets EPC contractors standardize procurement across pipe mills, container yards, and structural workshops. The 600–1500 mm width range feeds both narrow slitting lines for ERW pipe and wide decoiling setups for shipbuilding plates. Oiled surface treatment protects the coil during ocean transit without interfering with downstream welding or painting. Our Jinan lines run skin-pass finishing on every coil, which stabilizes flatness and eliminates yield point elongation marks — critical when the coil goes directly into press-brake forming.
Engineering Compliance and Certification Pathways
Structural fabrication for EU projects requires coil material conforming to EN 10025-2, where S235JR and S355JR carry CE marking obligations under the Construction Products Regulation. [NEED_CITE: CE marking requirements for structural steel per EN 10025-2 and CPR Regulation 305/2011] North American buyers specifying ASTM A36 need mill test certificates showing chemical composition and tensile properties traceable to heat number. For shipbuilding applications, classification society rules demand documented traceability from slab to finished coil. Our three-stage in-house inspection covers dimensional checks, surface quality, and mechanical sampling per GB and JIS standards, with SGS or BV third-party verification available before container sealing.
Steel Grade Selection and Hot Rolling Metallurgy
S235JR and S355JR follow the European EN 10025-2 designation system, where the number indicates minimum yield strength in MPa for thickness up to 16 mm — making S355JR the preferred choice for load-bearing structural frames where weight optimization matters. SS400 under JIS G3101 and ASTM A36 under ASME standards serve similar general structural roles but differ in chemical composition limits and impact testing requirements. [NEED_CITE: steel grade equivalence mapping between EN 10025, JIS G3101, and ASTM A36] Q235B under GB/T 700 remains the workhorse grade for domestic Chinese projects and cost-sensitive export orders. Hot rolling above recrystallization temperature produces a mill scale surface that, when combined with oiled or dull finish treatment, provides adequate corrosion resistance for indoor fabrication and short-term outdoor storage. Skin-pass rolling after cooling improves surface flatness and ensures consistent gauge across the coil width — essential for precision slitting into pipe feedstock.
The Hidden Cost of Unverified Coil Procurement
Ordering hot rolled coil without original mill test certificates means your fabricator cannot prove material grade to the project inspector. [NEED_CITE: documentation requirements for structural steel procurement per EN 10204 Type 3.1] Coil with uncontrolled negative tolerance may pass incoming inspection but fail after slitting, when edge zones reveal thickness deviation. Missing CE documentation stops customs clearance at EU ports, turning a CIF delivery into a demurrage bill. The pattern is consistent: the cheapest coil quote becomes the most expensive project line item when certification gaps surface at the wrong stage.
Why Buyers Return for Repeat Coil Orders
Factory-direct pricing from our Jinan mill eliminates trader margins on every ton, with volume discount structures reviewed every six months for recurring partners. Every Hot Rolled Carbon Steel Coil shipment carries original mill test certificates documenting chemical composition and mechanical properties per the specified grade standard. Our 2,800+ specification inventory covers standard widths and thicknesses for immediate dispatch, while custom orders in non-standard gauges run through our three production lines with typical lead times of 15–25 days. CE certification under EN 10210/EN 10219 and ISO 9001:2015 registration ensure documentation readiness for EU, Middle East, and Asian port authorities. Professional export teams optimize container loading plans for coil weight distribution and handle complete customs documentation, reducing port-side delays.
Documentation & Compliance
- Mill test certificate documenting S235JR, S355JR, SS400, or ASTM A36 chemical composition and mechanical properties per EN 10025-2 or ASTM A36, traceable to heat number
- CE certificate covering EN 10210 and EN 10219 structural steel product requirements for EU market customs clearance
- ISO 9001:2015 quality management certificate validating production process control and inspection protocols
- SGS or BV third-party inspection report available on request, covering dimensional verification, surface quality, and mechanical testing before shipment
- Material traceability by heat number from slab reheating through coiling, supporting project-specific quality audits
- Complete customs document package including packing list, bill of lading, and certificate of origin for destination port clearance
Packaging, Loading & Delivery
- Hot rolled coil bundled with three steel straps and edge protectors, oiled surface preserved with waterproof wrapping for ocean transit
- Coil width 600–1500 mm loaded in single or double rows per container weight limit, with wooden chocks preventing radial shift during vessel rolling
- Dull finish and oiled treatment applied at mill exit, maintaining surface integrity through 30-day port storage and container stuffing
- Heat number and grade identification stenciled on each coil end face, matching mill test certificate for site receiving inspection
- FOB, CIF, and DDP shipping terms available, with container loading plans optimized for 20-foot and 40-foot heavy-test equipment
- Custom cut-to-length plate orders decoiled, sheared, and stacked with interleaved protective paper before bundle wrapping
Starting Your Coil Procurement with Verified Documentation
Submit your specification sheet — grade, thickness, width, quantity, and destination port — and receive a competitive bulk quotation within 12 hours, including mill test certificate samples and container loading confirmation. Our engineering team reviews non-standard gauge or width requests against production line capability and provides lead time confirmation before contract signing.
Request Factory-Direct Coil Pricing with Mill Test Certificates
Send your hot rolled coil specifications to admin@sdxinjiyuan.com or contact via WhatsApp at +86 188 5315 7756 for bulk quotation and certification documentation.
Frequently Asked Questions
Q: How do S235JR, S355JR, SS400, and ASTM A36 compare for structural applications?
A: S235JR and S355JR follow EN 10025-2 with minimum yield strength of 235 MPa and 355 MPa respectively. SS400 under JIS G3101 and ASTM A36 serve equivalent general structural roles but differ in chemical limits and impact testing. We supply all four grades from stock with full cross-reference documentation for your project specification.
Q: What documents accompany each coil shipment?
A: Every batch ships with original mill test certificates showing chemical composition and mechanical properties traceable to heat number. CE certificates under EN 10210/EN 10219 and ISO 9001:2015 documentation are provided for EU and international customs clearance. SGS or BV third-party inspection reports are available on request before container sealing.
Q: Can you supply non-standard thickness or width beyond the listed range?
A: Standard stock covers 2.0–3.5 mm thickness and 600–1500 mm width. The extended 2–25 mm range is available through production orders with typical lead times of 15–25 days. Minimum order quantity starts from 1 ton for trial orders, with volume pricing for full-container bulk procurement.
Q: What is the difference between hot rolled and cold rolled coil for my application?
A: Hot rolled coil offers cost efficiency and suitability for structural fabrication, pipe manufacturing, and shipbuilding where surface finish is secondary. Cold rolled coil provides tighter tolerance and smoother surface for appliance housings and precision-formed components. Both options carry oiled or dull finish treatment for transit protection.
Q: How do you optimize container loading for heavy coil shipments?
A: Our export team prepares container loading plans based on coil weight, width, and destination port crane capacity. Coils are secured with steel straps, edge protectors, and wooden chocks to prevent movement during ocean transit. We coordinate with shipping lines for heavy-test containers and provide real-time tracking through delivery.
