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| Property | Parameter | Description |
|---|---|---|
| Product Name | Hot Rolled Checkered Steel Coil | Carbon steel coil with raised diamond/tear drop pattern |
| Material Grade | Q235B / SS400 / A36 / S235JR | International grade equivalents |
| Standard Compliance | GB/T 3277, JIS G3131, ASTM A786, EN 10025 | Meets major international standards |
| Manufacturing Process | Hot Rolled + Checkered Pattern Embossing | Continuous hot rolling with patterned rolls |
| Carbon (C) | ≤0.22% | Carbon content for formability and strength |
| Manganese (Mn) | ≤1.40% | Improves strength and hardenability |
| Silicon (Si) | ≤0.35% | Deoxidizer in steelmaking |
| Phosphorus (P) | ≤0.045% | Controlled for ductility |
| Sulfur (S) | ≤0.045% | Low sulfur for weldability |
| Tensile Strength | 370 - 500 MPa | Minimum tensile strength per standard |
| Yield Strength | ≥235 MPa | Minimum yield strength |
| Elongation | ≥26% | Ductility in 50mm gauge length |
| Base Thickness | 1.5 - 8.0 mm | Thickness excluding checkered pattern height |
| Pattern Height | 0.5 - 1.5 mm | Raised pattern above base thickness |
| Width Range | 1000 - 2000 mm | Standard and custom widths available |
| Coil Weight | 3 - 25 tons | Standard coil weight range |
| Pattern Type | Diamond, Tear Drop, Lentil, Round Bean | Multiple anti-slip pattern options |
| Surface Treatment | Oiled / Pickled / Galvanized | Rust prevention and surface options |
| Application | Flooring, Stair Treads, Truck Beds, Platforms | Anti-slip industrial applications |
| Certification | ISO 9001, SGS, EN 10204 3.1 | Quality certifications provided |
| MOQ | 5 tons | Minimum order quantity |
Acceptable Checkered Coil Quality, Dimensional Issue Resolved
Placed a 6-ton trial order for Q235B hot rolled checkered coil, 2mm base thickness, 1000mm width, diamond pattern for re-export to a Southeast Asian construction client. MTC was provided and chemical composition was within GB/T 3277-2016 limits. However, upon inspection at our Singapore warehouse, we found width tolerance on one coil measured at -1.8mm deviation, slightly outside the ±1.0mm tolerance specified. We raised this with the supplier and they acknowledged the issue, providing a partial credit adjustment within 5 business days and confirming tighter QC checks for subsequent production. The remaining coils were within tolerance. Communication during the resolution was responsive. We will consider a follow-up order based on whether the next shipment maintains consistent dimensional control.
Placed a 6-ton trial order for Q235B hot rolled checkered coil, 2mm base thickness, 1000mm width, diamond pattern for re-export to a Southeast Asian construction client. MTC was provided and chemical composition was within GB/T 3277-2016 limits. However, upon inspection at our Singapore warehouse, we found width tolerance on one coil measured at -1.8mm deviation, slightly outside the ±1.0mm tolerance specified. We raised this with the supplier and they acknowledged the issue, providing a partial credit adjustment within 5 business days and confirming tighter QC checks for subsequent production. The remaining coils were within tolerance. Communication during the resolution was responsive. We will consider a follow-up order based on whether the next shipment maintains consistent dimensional control.
