Description
Factory-Direct Hot Rolled Steel Coil Supply — Q195 through Q345 grades rolled in-house with mill test certificates issued per batch, shipped FOB/CIF/DDP to 50+ countries without broker markups.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q235 Q345 A36 Hot Rolled Steel Coil |
| Product Type | Steel Coil |
| Steel Grade | Q195, Q235, Q235B, Q345, Q345B, A36, SS400, St37, St37-2, St35, St35.4, St42, St52.4 |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Section Shape | Coil / Plate (slit-to-width available) |
| Thickness | 0.75–200 mm |
| Width | 600–2000 mm |
| Length | Customized |
| Coil ID | 508 / 610 mm |
| Technique | Hot Rolled |
| Surface Treatment | Hot Rolled / Coated |
| Tolerance | ±1% |
| Processing Service | Bending, Welding, Decoiling, Cutting, Punching |
| Application | Construction, Shipbuilding, Machinery, Pressure Vessels, Automotive, Bridges |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Structural beam fabrication, industrial plant frames, pipeline support brackets |
| Construction Companies | Bridge deck plates, building column bases, scaffolding components |
| Machinery Manufacturers | Equipment chassis, conveyor frames, crane boom sections |
| Shipbuilding | Hull plate forming, deck stiffeners, bulkhead panels |
| Pressure Vessel Fabricators | Tank shells, heat exchanger plates, storage vessel bodies |
What Negative Tolerance Overshoot Costs on a Heavy Plate Order
A coil that passes mill specs but fails third-party thickness verification at destination port can trigger full-batch rejection, re-cutting fees, and weeks of schedule delay.
When hot rolled steel coil arrives at a Southeast Asian EPC site and an independent inspector flags thickness deviation beyond ±1%, the entire shipment gets quarantined. The contractor faces re-cutting costs, emergency air-freight for replacement plates, and liquidated damages from the project owner. I have watched a Q235B花纹卷 order get held for two months because the negative tolerance exceeded 0.3 mm — a gap that no mill test certificate from the original supplier could explain away. [NEED_CITE: EN 10219 dimensional tolerance requirements for hot rolled structural steel]
How Thickness Range and Width Match Structural Fabrication Demands
A 0.75–200 mm thickness span covers everything from light-gauge machine guards to heavy bridge deck plates, while 600–2000 mm width accommodates standard decoiling lines without secondary slitting. For a conveyor system fabricator ordering Q345B coil, the ±1% tolerance ensures that laser-cut brackets hold dimensional accuracy after punching and bending. Our in-house physical and chemical lab tests every heat before release, so the mill test certificate matches the actual coil chemistry — not a batch-averaged guess.
Engineering Compliance Across Carbon Steel Grade Systems
Structural designers specifying Q235B under GB standards need equivalence mapping when the same project requires ASTM A36 for North American code compliance or S235JR under EN 10025 for European export. [NEED_CITE: steel grade equivalence between GB Q-series, ASTM A-series, and EN S-series] Hot rolled coil in Q345B meets yield requirements for pressure vessel shells under ASME Section II, while SS400 satisfies JIS G 3101 for general structural use in Japanese-spec industrial plants. CE certification under EN 10210/10219 clears European customs without additional testing, and SGS or BV third-party inspection reports satisfy most EPC contractor quality gates before shipment.
Carbon Steel Grade Selection for Load-Bearing and Formability
The Q-series (Q195–Q345) follows the Chinese yield strength designation system, where the number indicates minimum yield point in MPa — Q195 suits light structural framing, while Q345B carries heavier loads in bridge and building columns. ASTM A36 provides comparable performance for North American projects with established weldability and formability. The St-series (St37, St52.4) aligns with DIN standards for German-engineered machinery frames. Hot rolling produces a mill scale surface that accepts primer coatings directly, while coated treatment options add corrosion resistance for marine environments or outdoor storage yards.
Hidden Costs of Unverified Coil Chemistry and Thickness
Ordering Q235 Q345 A36 hot rolled steel coil from a trader who cannot provide heat-level mill test certificates creates three failure modes: chemistry mismatch causing weld cracks during fabrication, thickness deviation triggering port rejection, and missing CE documentation blocking customs clearance. [NEED_CITE: EN 10204 inspection document types for steel mill test certificates] A structural frame built from off-chemistry Q345B may pass visual inspection but fail ultrasonic testing at the connection nodes, forcing tear-down and re-fabrication months after installation.
Why Project Procurement Teams Source Hot Rolled Coil Through Us
Our three dedicated production lines roll Q195 through Q345 grades in 2,800+ specification combinations, eliminating the need to split orders across multiple mills. The in-house physical and chemical lab performs real-time spectrometer analysis and tensile testing before any coil leaves the facility — the mill test certificate reflects actual test data, not supplier-declared values. We hold CE certification under EN 10210/10219, ISO 9001:2015 registration, and Singapore FPC approval, so European and Southeast Asian projects clear customs with complete documentation. Custom non-standard widths and thicknesses are available without the high minimum order quantities that typical mills impose. Professional loading plans optimize container weight distribution for 20-ton-per-coil shipments, and door-to-door logistics coordination handles port clearance at destination.
Documentation & Compliance
- Mill test certificate documenting Q235B chemical composition (C, Mn, Si, P, S) and mechanical properties (yield strength, tensile strength, elongation) per GB/T 700
- CE certificate confirming Q345B hot rolled coil compliance with EN 10219 structural hollow section requirements for European market entry
- ISO 9001:2015 quality management system certificate covering hot rolled steel coil production and inspection processes
- SGS or BV third-party inspection report verifying thickness tolerance, surface quality, and dimensional accuracy before shipment
- Material traceability by heat number linking each coil to ladle analysis, rolling schedule, and test results
- Customs documentation package including commercial invoice, packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Hot rolled steel coil bundled with galvanized steel straps and edge protectors to prevent coil edge damage during ocean transit
- Mill scale surface treated with anti-rust oil coating to prevent corrosion during container shipping to tropical ports
- Container loading optimized for 508/610 mm coil ID with wooden saddles and chocking to prevent rolling during vessel transit
- Custom slit-to-width service available for 600–2000 mm range, with coils labeled by heat number, steel grade, and thickness
- FOB Jinan/Qingdao port, CIF destination port, or DDP door-to-door delivery with real-time shipment tracking
- Coil identification tags showing steel grade (Q235B/Q345B/A36), thickness, width, coil weight, and heat number for site traceability
How to Request a Quotation for Your Coil Specification
Submit your required steel grade, thickness, width, quantity, and destination port via email or WhatsApp, and receive a detailed quotation within 12 hours including unit price, mill test certificate availability, production lead time, and shipping terms. For non-standard thickness or custom slit widths, our technical team provides a feasibility assessment and alternative grade recommendations if your first choice exceeds current rolling capacity. Confirm CE certification requirements and third-party inspection needs before contract signing to ensure complete documentation for your project’s quality gate.
Frequently Asked Questions
Q: Can you provide mill test certificates for Q235B and Q345B hot rolled steel coil?
A: Yes, every coil shipment includes an original mill test certificate documenting chemical composition and mechanical properties per GB/T 700 or EN 10025, with heat-level traceability from ladle analysis to final inspection.
Q: What is the minimum order quantity for custom slit widths?
A: The MOQ is 1 Ton for standard widths (600–2000 mm), and custom slit-to-width orders follow the same MOQ with typical production lead times for non-standard dimensions.
Q: Do you arrange third-party inspection before shipment?
A: Yes, we coordinate SGS or BV inspection at our facility before loading, covering thickness measurement, surface quality, dimensional accuracy, and visual inspection per your project specification.
Q: Can you supply Q235 Q345 A36 hot rolled steel coil with CE certification for European projects?
A: Our hot rolled steel coil production holds CE certification under EN 10210/10219, and we provide complete CE documentation including Declaration of Performance and factory production control certificates for EU customs clearance.
Q: What shipping terms do you offer for heavy coil cargo?
A: We provide FOB, CIF, and DDP shipping options with professional container loading plans optimized for coil weight distribution, real-time tracking, and door-to-door logistics coordination to 50+ countries.
Start Your Hot Rolled Steel Coil Procurement
Send your specification sheet — steel grade, thickness, width, quantity, and destination — to receive a quotation with mill test certificate preview and production schedule within 12 hours.
Email: admin@sdxjysteel.com
WhatsApp: +86 188 5315 7756
