Hot Rolled Cold Rolled Steel Plate 0.3-200mm Thickness, 600-3000mm Width, Q235 Q345 SS400 S235 S355 ASTM A36, for Construction, Shipbuilding & Machinery
Production Process
The production process begins with the careful selection of raw materials, either steel billet or slab. These materials are then heated in a pushing furnace or walking beam furnace, followed by rough rolling and finish rolling to achieve the target dimensions. After laminar cooling for controlled cooling, the plates are straightened to improve flatness, then cut to size by shearing or flame cutting. Surface inspection, both visual and automated, ensures quality, while ultrasonic testing for internal defects is available upon request. Optional surface treatments such as galvanizing, painting, oiling, or pickling may be applied. Finally, the plates are labeled, packed, and ready for warehousing or shipping.
Product Attributes
Product Name： Steel Plate / Steel Sheet
Process： Hot rolled / Cold rolled
Thickness： 0.3mm – 200mm (hot rolled: 1.5-200mm; cold rolled: 0.3-3.0mm)
Width： 600mm – 3000mm (custom widths available)
Length： 1000mm – 12000mm, or as customer request
Material Grades：
Chinese standard: Q195, Q235, Q345, Q420, Q460
Japanese standard: SS400, SM490, SPHC, SPCC
American standard: ASTM A36, A572 Gr.50, A516 Gr.70, A283 Gr.C
European standard: S235JR, S275JR, S355JR, S355J2
Surface Finish： Black / Hot dipped galvanized / Painted (various colors) / Oiled / Pickled and oiled
Edge Condition： Mill edge / Slit edge / Trimmed edge
Standard： GB/T 3274, GB/T 700, JIS G3101, ASTM A36, EN 10025
Application： Construction, shipbuilding, bridges, pressure vessels, machinery, oil & gas pipelines, structural steel fabrication
Specification Table
Hot Rolled Steel Plate
| Thickness (mm) | Width (mm) | Length (mm) | Common Grades | Surface |
|---|---|---|---|---|
| 1.5 – 3.0 | 600 – 1500 | 2000 – 6000 | Q235, SS400, A36, S235JR | Black / Oiled |
| 3.0 – 6.0 | 600 – 2000 | 2000 – 8000 | Q235, Q345, SS400, A36, S275JR | Black / Oiled |
| 6.0 – 20 | 600 – 2500 | 2000 – 10000 | Q235, Q345, SS400, A36, S355JR | Black / Oiled |
| 20 – 50 | 600 – 2800 | 2000 – 12000 | Q345, SM490, A572 Gr.50, S355J2 | Black |
| 50 – 100 | 600 – 3000 | 2000 – 12000 | Q345, SM490, A572 Gr.50 | Black |
| 100 – 200 | 600 – 3000 | 2000 – 10000 | Q345, A516 Gr.70 | Black |
Cold Rolled Steel Plate
| Thickness (mm) | Width (mm) | Length (mm) | Common Grades | Surface |
|---|---|---|---|---|
| 0.3 – 0.5 | 600 – 1250 | 1000 – 3000 | SPCC, Q195, DC01 | Bright / Oiled |
| 0.5 – 1.0 | 600 – 1500 | 1000 – 4000 | SPCC, Q195, Q235, DC01 | Bright / Oiled |
| 1.0 – 2.0 | 600 – 1500 | 1000 – 5000 | SPCC, Q195, Q235, DC01 | Bright / Oiled |
| 2.0 – 3.0 | 600 – 1500 | 1000 – 5000 | Q235, SPCC | Bright / Oiled |
| Length: | Random lengths (R/L) or single random lengths (SRL), typically ranging from 18 to 24 feet. | |||
| Application | Oil/gas pipe ,aerospace use,machine parts ,furnace ,geological exploration,acid resistance ,bearing |
Packing & Delivery
Packaging Methods:
Standard Packaging: Steel plate and strapping (3-6 straps per bundle)
Interlayer Padding: Kraft paper or plastic film between layers to prevent scratches (optional)
Edge Protection: Corner protectors (optional)
Labels: Each bundle is labeled with material, size, furnace number, net weight, and customer order number
Waterproofing: Waterproof paper and plastic film wrapping available for sea freight (optional)
Shipping Methods:
Containers: 20ft/40ft flat rack containers or open top containers (suitable for oversized steel plates)
Bulk Cargo Ships: Suitable for large quantities (over 100 tons)
Main Port of Loading: Tianjin
Delivery Time: 7-15 days for standard sizes; 20-35 days for custom orders
FAQ
Q1: What is the difference between hot rolled and cold rolled steel plate？
A1: Hot rolled steel plate is processed at high temperature, has a rough surface, and is suitable for structural applications. Cold rolled steel plate is processed at room temperature, has a smoother surface, tighter tolerances, and is used for precision applications like automotive panels and appliances.
Q2: What is the difference between steel plate and steel sheet？
A2: Generally, steel plate refers to thickness ≥ 3mm, while steel sheet refers to thickness < 3mm. However, the definition may vary by region and standard.
Q3: What materials do you offer？
A3: We offer Chinese standard (Q195, Q235, Q345), Japanese standard (SS400, SM490, SPHC), American standard (ASTM A36, A572, A516), and European standard (S235, S275, S355).
Q4: Can you cut plates to custom sizes？
A4: Yes. We offer shearing and flame cutting services to produce custom lengths and widths.