Carbon Steel Checkered Plate — Factory Direct Supplier | Huaxia-Steel
Huaxia-Steel supplies carbon steel checkered plate (tread plate, diamond plate) in grades Q235B, SS400, A36, and S235JR with tear-drop, diamond, and lentil patterns. Thickness ranges from 2.0mm to 12.0mm base metal, with pattern height 0.8 – 1.5mm. Checkered plate combines structural strength with anti-slip properties, eliminating the need for separate floor coatings in industrial environments.
Product Overview
Checkered plate is manufactured by hot rolling carbon steel slab with patterned work rolls that emboss the raised diamond or tear-drop design into the surface. The pattern provides slip resistance (coefficient of friction 0.4 – 0.6 dry, 0.3 – 0.4 wet) while the base plate provides load-bearing capacity. Common applications include flooring, stair treads, vehicle decks, and platform construction.
Specifications
| Parameter | Standard Range | Tolerance |
|---|---|---|
| Base Thickness | 2.0 – 12.0 mm | ±0.20 mm (t ≤ 3mm); ±0.30 mm (t > 3mm) |
| Pattern Height | 0.8 – 1.5 mm | ≥ 0.7 × nominal |
| Width | 1,000 – 1,800 mm | +20 mm / 0 mm |
| Length | 2,000 – 12,000 mm | +50 mm / 0 mm |
| Pattern Type | Tear-drop, Diamond, Lentil | — |
| Flatness | ≤ 8 mm/m | — |
Weight Calculation
Theoretical weight includes base plate + pattern allowance:
| Base Thickness | Theoretical Weight (kg/m²) |
|---|---|
| 2.0 mm | 17.8 – 18.5 |
| 3.0 mm | 26.6 – 27.5 |
| 4.5 mm | 39.5 – 40.8 |
| 6.0 mm | 52.5 – 54.0 |
| 8.0 mm | 69.8 – 71.5 |
| 10.0 mm | 87.0 – 89.0 |
Note: Actual weight varies by pattern geometry and rolling mill calibration. Ordering by theoretical weight is standard practice; invoicing by actual scale weight available on request.
Available Grades
| Grade | Standard | Yield Strength | Application |
|---|---|---|---|
| Q235B | GB/T 3277 | ≥ 235 MPa | General construction, platforms, stairs |
| SS400 | JIS G3101 / JIS G3193 | ≥ 245 MPa | Export to Japan, Southeast Asia |
| A36 | ASTM A36 | ≥ 250 MPa | US standard projects, ship decks |
| S235JR | EN 10025-2 / EN 10029 | ≥ 235 MPa | European projects, CE marking |
Manufacturing Standards
- GB/T 3277: Hot-rolled checkered steel sheet and strip (Chinese standard)
- JIS G3193: Dimensions, mass and permissible variations of hot rolled steel plates, sheets and strips
- ASTM A786 / A786M: Hot-rolled carbon, low-alloy, high-strength low-alloy, and alloy steel floor plates
- EN 10029: Hot-rolled steel plates 3mm thick or above — tolerances on dimensions and shape
Applications
- Industrial flooring: Factory walkways, platform decks, mezzanine floors
- Transportation: Truck beds, trailer floors, ship decks, bus step treads
- Stairs and ladders: Stair treads, ship gangways, fire escapes
- Architectural: Feature walls, decorative panels, non-slip entryways
- Mining and construction: Equipment platforms, scaffolding boards, trench covers
Quality Assurance
- Pattern geometry check: Pattern height and pitch measured with depth gauge and template
- Base thickness verification: Ultrasonic thickness gauge on unpatterned underside
- Tensile test: One per heat; yield strength and elongation recorded
- Bend test: 180° bend (d = 2a) to confirm ductility per GB/T 232
- Surface inspection: No cracks, laminations, or scale inclusions affecting pattern integrity
- Coating adhesion: For painted/galvanized orders, cross-hatch test per ASTM D3359
Surface Treatments and Finishes
- Mill finish: As-rolled, black oxide scale (standard, most economical)
- Pickled: Acid-cleaned surface, light grey, improved paint adhesion
- Oiled: Rust-preventive oil film for short-term storage
- Hot-dip galvanized: 60 – 600 g/m² zinc coating (ASTM A123, EN ISO 1461)
- Painted: Epoxy primer + polyurethane topcoat, RAL colors available
Packaging and Shipping
- Standard packing: Mill edge, steel-band strapping (4 bands minimum per bundle), oiled surface
- Export packing: Bundles wrapped in HDPE film; moisture-barrier paper for ocean freight
- Sheet protection: Interleaved with kraft paper for thicknesses ≤ 4mm to prevent scratching
- Container loading: 20’GP: 22 – 25 MT; 40’HC: 26 – 28 MT (bundles secured with timber battens)
- Custom cutting: Plasma, laser, or shear cutting to specified dimensions; chamfered edges on request
Request pricing for carbon steel checkered plate — specify base thickness, grade, pattern type, dimensions, quantity, and required surface treatment. Samples and mill test certificates available on request.
