Description
Factory-Direct Hot Rolled Chequered Coil — In-house physical and chemical laboratory verifies every coil’s chemical composition and surface pattern depth before shipment.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | A36 Hot Rolled Steel Chequered Coil |
| Product Type | Hot Rolled Chequered Steel Coil |
| Steel Grade | A36, Q235, Q235B, Q345, Q345B, Q195, St37, St37-2, St42, St35.4, St52.4, St35, SS400 |
| Standard | AISI, ASTM, BS, DIN, GB, JIS |
| Thickness | 3–200 mm |
| Width | 600–2000 mm |
| Length | Customized |
| Coil ID | 508 / 610 mm |
| Technique | Hot Rolled |
| Surface Treatment | Chequered pattern |
| Tolerance | ±1% |
| Processing Service | Welding, Punching, Cutting, Bending, Decoiling |
| Application | Construction, Shipbuilding, Machinery |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Construction & Infrastructure | Industrial floor plates, stair treads, walkway grating for EPC plant projects |
| Shipbuilding & Marine | Anti-slip deck plates for cargo holds and vessel gangways |
| Machinery & Transport | Truck bed liners, equipment platforms, factory workshop flooring |
| Pressure Vessels & Bridges | Structural base plates and maintenance access platforms |
| Automotive Manufacturing | Loading ramp surfaces and cargo area floor panels |
What Negative Tolerance Really Costs on a Chequered Coil Order
A 0.4 mm thickness deviation on a 3.8 mm chequered coil means an entire container gets rejected at destination port.
When procurement teams order hot rolled chequered coils without specifying tolerance bands clearly, mills may apply maximum negative tolerance to reduce raw material cost. The buyer pays by theoretical weight but receives significantly less steel. On a 3.54 mm or 4.5 mm chequered coil, the raised diamond pattern already complicates ultrasonic thickness measurement — if the base plate is under-gauge, structural load capacity drops and floor plate deflection exceeds design limits. [NEED_CITE: hot rolled chequered plate thickness tolerance standards]
Matching Chequered Coil to Anti-Slip Flooring Projects
Hot rolled A36 chequered coil delivers the surface friction coefficient required for industrial walkways and stair treads where wet or oily conditions exist. The 3–200 mm thickness range covers everything from light-duty mezzanine flooring at 3.8 mm to heavy machinery platform base plates at 4.5 mm and beyond. Our decoiling and cut-to-length service means the A36 hot rolled steel chequered coil arrives on site as pre-sized sheets, eliminating secondary cutting and reducing scrap loss at the fabrication yard.
Engineering Compliance and Certification Requirements
Structural flooring in EU-bound projects must meet EN 10210 and EN 10219 hot rolled hollow section standards for material traceability and mechanical property verification. The A36 grade conforms to ASTM A36 requirements, while Q235B serves as the domestic equivalent under GB standards — specifying the correct grade designation avoids customs documentation mismatches at destination port. [NEED_CITE: steel grade equivalence between ASTM A36 and EN S235JR] Third-party inspection through SGS or BV provides independent verification of chemical composition and tensile properties for projects requiring auditable supply chains.
Steel Grade Selection and Hot Rolling Process
The A36 carbon steel grade offers minimum 250 MPa yield strength suitable for general structural flooring where extreme load-bearing is not the primary design driver. For heavier industrial applications, Q345B provides higher yield strength while maintaining the weldability and formability needed for on-site fabrication. The hot rolling process with controlled laminar flow cooling ensures consistent chequered pattern depth across the coil width — this matters because uneven pattern height creates tripping hazards and inconsistent friction performance across a walkway surface. Thickness tolerance of ±1% on a 4.5 mm chequered coil means the actual base plate thickness stays within 4.455–4.545 mm, keeping theoretical weight calculations reliable for cost estimation. [NEED_CITE: hot rolled plate thickness tolerance and weight calculation methods]
Hidden Costs of Unverified Chequered Coil Procurement
Ordering chequered coil without mill test certificate traceability creates compounding risks: material grade mismatch fails structural engineering inspection, missing CE documentation delays EU customs clearance by weeks, and excessive negative tolerance means the buyer absorbs weight shortfall as pure financial loss. A single container of 3.8 mm chequered coil rejected for thickness non-compliance costs more in return freight and replacement production than the original order value. [NEED_CITE: steel import customs documentation requirements for EU market]
Procurement Confidence Through Vertical Integration
Our three dedicated production lines with in-house physical and chemical laboratory mean every A36 hot rolled steel chequered coil undergoes incoming material inspection, in-process thickness and pattern verification, and final dimensional audit before release. The 41 invention patents include proprietary rolling technology that maintains consistent chequered pattern geometry across the full 600–2000 mm width range. With 2,800+ specifications in our rolling schedule, non-standard thickness like 3.54 mm or custom pattern pitch can be accommodated without the extended lead times typical of trading companies who must wait for mill campaign runs. CE certification under EN 10210/10219 and ISO 9001:2015 quality management ensure documentation matches the physical product — no last-minute certificate scrambling before vessel departure.
Documentation & Compliance
- Mill test certificate documenting A36 chemical composition including carbon, manganese, silicon, sulfur and phosphorus content per ASTM A36 requirements
- CE certificate confirming conformity with EN 10210/10219 hot rolled structural steel standards for EU market customs clearance
- ISO 9001:2015 quality management system certificate covering the full production and inspection workflow
- SGS or BV third-party inspection report verifying thickness, width, surface pattern quality and mechanical properties upon buyer request
- Heat number traceability linking each chequered coil to its original slab chemistry and rolling parameters
- Complete customs documentation package including packing list, bill of lading and certificate of origin
Packaging, Loading & Delivery
- A36 chequered coils bundled with minimum three steel straps and edge protectors to prevent pattern damage during handling and ocean transit
- Surface oiled or wrapped with waterproof paper based on destination climate to prevent rust formation on the hot rolled finish during container shipping
- Container loading optimized for 600–2000 mm width coils with wooden cradles and chocking to prevent coil shift in 20ft and 40ft containers
- Decoiling and cut-to-length service available before shipment, with sheets stacked and banded for direct installation at project site
- Each coil marked with heat number, steel grade A36, thickness, width and coil weight for site identification and inventory tracking
- FOB, CIF and DDP shipping terms available with professional loading plans for 50+ countries including EU, North America, Middle East and Southeast Asia
Start Your Chequered Coil Procurement
Submit your thickness, width, steel grade and destination port requirements to receive a detailed quotation including unit price, production lead time and applicable certification documentation. Our technical team responds within 12 hours with mill test certificate samples and loading optimization options for your specific order volume.
Request A36 Hot Rolled Steel Chequered Coil Quotation
Send your specifications via email to admin@sdxjysteel.com or contact us at +86 188 5315 7756 (WhatsApp/WeChat available) to confirm certification requirements and delivery schedule for your project.
