Description
Factory-Direct Chequered Coil — every batch shipped with original mill test certificates and heat-number traceability.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | A36 Hot Rolled Steel Chequered Coil |
| Product Type | Steel Coil (Chequered / Tread Plate Coil) |
| Steel Grade | A36, Q235, Q235B, Q345, Q345B, Q195, SS400, St37, St37-2, St35.4, St52.4, St35, St42 |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Section Shape | Coil / Plate (Chequered Pattern) |
| Thickness | 3–200 mm |
| Width | 600–2000 mm |
| Length | Customized |
| Coil ID | 508 / 610 mm |
| Technique | Hot Rolled |
| Surface Treatment | Chequered pattern (diamond / lentil / bean) |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Application | Industrial flooring, walkways, construction, shipbuilding, machinery |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Anti-slip stair treads, mezzanine flooring, scaffolding platforms |
| Industrial Manufacturing | Factory floor plating, conveyor walkways, machine base covers |
| Shipbuilding & Marine | Deck plating, engine room flooring, gangway treads |
| Logistics & Warehousing | Truck bed liners, loading ramp surfaces, storage platform covers |
What Missing Mill Certificates Cost on a Chequered Coil Shipment
A pretty material sheet means nothing if the yield strength cannot hold the floor load.
Global buyers sourcing chequered coil for industrial flooring or structural walkways repeatedly face the same trap: the supplier sends a clean-looking test report, but the steel fails on-site when the SGS inspector pulls a random sample. The chemistry is off, the grain structure is inconsistent, and the coil gets rejected at the port — or worse, after it has already been cut and welded into place. [NEED_CITE: steel material traceability requirements for structural flooring applications]
When you are ordering an A36 hot rolled chequered steel coil for a warehouse mezzanine or a ship deck, the gap between “looks like A36” and “certified A36 with heat-number traceability” is the difference between a project that passes inspection and one that gets torn out and re-ordered at triple the cost.
How Chequered Pattern Depth Matches Industrial Flooring Loads
The raised diamond or lentil pattern on a hot rolled chequered coil is not cosmetic — it provides the anti-slip coefficient that flat plate cannot deliver in wet or oily industrial environments. For warehouse floors, factory walkways, and ship engine rooms, the pattern height and base thickness together determine whether the surface can withstand forklift traffic, chemical exposure, and constant foot traffic without wearing smooth. Our A36 hot rolled chequered steel coil is produced in thicknesses from 3 mm to 200 mm and widths up to 2000 mm, covering everything from light-duty catwalks to heavy-load truck bay flooring. Each coil is decoiled, cut, and punched to the exact dimensions your site requires — no secondary cutting waste on the ground.
Engineering Compliance for Chequered Plate in Structural Applications
When chequered coil is specified for load-bearing flooring in construction or infrastructure projects, the steel grade must conform to the structural design code governing the project — whether that is ASTM A36 for North American specs, Q235B / Q345B for Chinese GB-standard projects, or S235JR / S355JR for European EN 1993 compliance. [NEED_CITE: steel grade equivalence mapping between ASTM A36 and EN S235JR] The chequered pattern does not change the structural properties, but the base plate thickness and tolerance directly affect load calculations. Our production runs full chemical and mechanical testing per batch, and every coil ships with an original mill test certificate documenting the exact heat number, yield behavior, and tensile results — not a generic template.
Steel Grade Selection Across ASTM, GB, and JIS Systems
A36 is the ASTM carbon structural steel grade most commonly specified for general construction and industrial flooring in North American and international projects. Its GB equivalent is Q235B, and its JIS equivalent is SS400 — all three share similar carbon content ranges and yield behavior, making them interchangeable for non-critical structural applications where anti-slip flooring is the primary requirement. For heavier load conditions, Q345B (GB) or S355JR (EN) provides higher yield strength while maintaining the same weldability and formability. Our hot rolled chequered coil production covers A36, Q235B, Q345B, SS400, and the St37 / St52 DIN series in a single order, so multi-standard projects do not need to source from separate suppliers. The hot rolling process ensures the chequered pattern is integrally formed into the surface — not welded or glued on — giving it the durability to resist pattern flattening under repeated traffic.
The Hidden Cost of Tolerance Drift on Chequered Coil
When a chequered coil is ordered at 6 mm base thickness but arrives at 5.4 mm due to unchecked negative tolerance, the load-bearing capacity drops and the project engineer must either reject the material or recalculate the entire floor structure. [NEED_CITE: impact of plate thickness tolerance on structural load capacity] Beyond the structural risk, the weight discrepancy triggers customs disputes at the destination port — the declared tonnage does not match the actual weight, and the buyer pays penalties or faces shipment holds. Every A36 hot rolled chequered steel coil we ship is measured and certified at ±1% thickness tolerance, with the actual weight documented on the packing list and bill of lading.
Why Project Buyers Source Chequered Coil Directly from Our Mill
We operate three hot rolling lines in Jinan with a standing inventory covering over 2,800 specifications — including chequered coil in A36, Q235B, and Q345B across the full 3–200 mm thickness range. Every coil is tested in our in-house lab before shipment, and the original mill test certificate travels with the cargo — not emailed weeks later. For buyers who need third-party verification, we arrange SGS or BV inspection at the mill before container loading. Our export team handles the full documentation package — commercial invoice, packing list, bill of lading, certificate of origin — and optimizes container loading to fit maximum tonnage within standard 20ft and 40ft units. Volume buyers receive tiered pricing with six-month discount reviews, and we support split shipments against blanket orders for projects with phased delivery schedules.
Documentation & Compliance
- Mill test certificate documenting A36 / Q235B chemical composition and mechanical properties per ASTM A36 or GB/T 700, with heat number traceability
- CE certificate per EN 10210 / EN 10219 for projects requiring European structural compliance
- ISO 9001:2015 quality management certificate covering the full production and inspection process
- SGS or BV third-party inspection report available on request, covering dimensional checks, surface quality, and mechanical testing
- Material traceability by heat number stamped on each coil and documented on the test certificate
- Full customs document package: packing list with actual weight, bill of lading, certificate of origin, and commercial invoice
Packaging, Loading & Delivery
- Chequered coils bundled with galvanized steel strips and edge protectors to prevent pattern damage during ocean transit
- Anti-rust oil applied to the chequered surface before wrapping, with waterproof kraft paper and steel sheet outer protection
- Container loading optimized for 20ft and 40ft units based on coil width and weight, maximizing payload within port weight limits
- Decoiling and cut-to-length service available before shipment, delivering flat chequered plates in exact project dimensions
- Heat number and steel grade clearly marked on each coil ID tag and outer wrapping for site identification
- FOB, CIF, and DDP terms available with door-to-door logistics coordination for major port destinations
Ready to Verify Our Chequered Coil Against Your Project Spec
Submit your required steel grade, thickness, width, pattern type, and destination port — we return a detailed quotation with mill test certificate samples, SGS inspection options, and container loading plans within 12 hours. For non-standard thickness or custom pattern requirements, we provide a technical feasibility review and lead time confirmation before you commit.
Request Your Chequered Coil Quote with Mill Test Certificate
Send your specifications to admin@sdxinjiyuan.com or reach us on WhatsApp at +86 188 5315 7756 for a factory-direct quotation and sample arrangement.
Frequently Asked Questions
Q: What is the difference between A36, Q235B, and SS400 for chequered coil?
A: A36 (ASTM), Q235B (GB), and SS400 (JIS) are carbon structural steel grades with similar chemical composition and yield behavior, making them interchangeable for general industrial flooring and anti-slip walkway applications. We produce chequered coil in all three grades and can supply cross-reference documentation for your project engineer.
Q: Can you provide SGS or BV third-party inspection for chequered coil orders?
A: Yes. We arrange SGS or BV inspection at our mill before shipment, covering dimensional verification, surface pattern quality, and mechanical property testing. The inspection report is issued independently and travels with the cargo.
Q: What is the MOQ for custom thickness or non-standard width chequered coil?
A: Standard specifications are available from 1 ton from our ready stock. Custom thickness, width, or pattern requirements are produced to order with typical production lead times depending on the specification and quantity.
Q: How do you ensure the chequered pattern depth is consistent across the coil?
A: The chequered pattern is integrally formed during the hot rolling process using precision rollers, not added as a separate layer. Each production batch undergoes in-house dimensional inspection to verify pattern height, base thickness, and surface uniformity before the coil is approved for shipment.
Q: Do you handle export documentation and customs clearance support?
A: Yes. Our export team prepares the complete documentation package — commercial invoice, packing list with actual weight, bill of lading, certificate of origin, and mill test certificate — and coordinates container loading optimization to ensure smooth customs clearance at your destination port.
