Cold rolled steel coil is a high-precision steel product processed from hot rolled steel coil through cold rolling at room temperature without heating, a key variant of carbon steel products with excellent surface quality and dimensional accuracy. It is widely compliant with international and national mainstream standards, featuring a smooth and uniform surface, tight dimensional tolerance, superior formability and machinability, and is a core raw material for various manufacturing and processing industries. It can be customized with different thicknesses, widths and surface treatments according to customer requirements, adapting to stamping, bending, welding and other processing technologies.
Características principales
- Excellent Surface Quality: Smooth and clean surface without obvious oxide scale, pits or cracks; can be directly used for surface processing such as painting, electroplating and laminating without complex pretreatment.
- High Dimensional Accuracy: Strict control of thickness, width and flatness tolerances, meeting the precision requirements of high-end manufacturing.
- Superior Mechanical Properties: Higher tensile strength and hardness than hot rolled steel coil, with good ductility, toughness and formability, suitable for complex cold forming processes.
- Good Machinability: Easy to perform stamping, bending, shearing, welding and other processing operations, with stable processing performance and low defective rate.
- Customizable Surface Treatment: Can be processed with pickling, oiling, passivation, galvanizing, etc., to improve corrosion resistance and surface finish.
Production & Manufacturing Process
- Raw Material Preparation: Select qualified hot rolled steel coil (low-carbon steel strip as the main raw material) with uniform chemical composition and stable mechanical properties, and conduct surface cleaning to remove surface oxide scale, oil stains and impurities.
- Cold Rolling: Pass the pretreated hot rolled steel coil through a cold rolling mill at room temperature for multi-pass rolling, control the rolling pressure and speed to reduce the thickness of the steel strip to the nominal size, and form the initial cold rolled steel coil.
- Annealing Treatment: Perform continuous annealing on the cold rolled steel coil after rolling to eliminate work hardening caused by cold rolling, restore the ductility and toughness of the steel, and adjust the mechanical properties to meet different application requirements.
- Leveling & Slitting: Conduct leveling treatment on the annealed steel coil to improve flatness; slit the steel coil into coils with specified widths according to customer needs through a slitting machine.
- Surface Finishing: Carry out surface treatment processes such as pickling, oiling or passivation according to product requirements to enhance corrosion resistance and prevent rust during storage and transportation.
- Inspection & Coiling: Conduct strict quality inspection on the finished steel coil (including dimensional measurement, mechanical property testing, surface quality inspection); after passing the inspection, coil and package the product for storage and delivery.
Parámetros del producto
| Parámetro | Specification | Tolerancia |
| Espesor | 0.10mm – 3.00mm (Customizable) | ±0.005mm – ±0.02mm (depending on thickness) |
| Anchura | 100mm – 1500mm (Customizable) | ±0.5mm – ±2.0mm (depending on width) |
| Coil ID/OD | Inner diameter: 508mm/610mm; Outer diameter: ≤2000mm | Personalizable |
| Weight per Coil | 3t – 15t (Customizable) | ±0.5t |
| Surface State | Oiled, pickled, passivated, bare (Customizable) | No obvious defects, smooth surface |
| Ejecutivo estándar | GB/T 708-2019, ASTM A1008, EN 10130, JIS G3141 | – |
Chemical Composition (wt%, Low-carbon Cold Rolled Steel Coil)
| Elemento | Contenido (fracción de masa) |
| Carbono (C) | ≤0.20% |
| Silicio (Si) | ≤0.50% |
| Manganeso (Mn) | 0.30% – 1.60% |
| Fósforo (P) | ≤0.045% |
| Azufre (S) | ≤0.045% |
| Copper (Cu) | ≤0.30% |
| Hierro (Fe) | Saldo |
Aplicaciones típicas
- Home Appliance Manufacturing: Shells and structural parts of refrigerators, washing machines, air conditioners, microwave ovens, etc., requiring high surface quality and dimensional precision.
- Automobile Industry: Automobile body panels, chassis parts, interior and exterior trim parts, suitable for complex stamping and forming processes.
- Construction & Decoration: Light steel keels, decorative panels, door and window frames, with good formability and surface finish.
- Machinery Manufacturing: Precision parts, hardware accessories, instrument shells, requiring high machining accuracy and mechanical properties.
- Electronic & Electrical Industry: Enclosures of electrical cabinets, electronic components, radiator brackets, with stable size and good corrosion resistance.
- Packaging Industry: Metal packaging materials such as tinplate base material, can body and can cover processing.
Normas aplicables
- Chinese: GB/T 708-2019, GB/T 3280 (for stainless steel cold rolled coil)
- International: ASTM A1008, ASTM A653
- European: EN 10130, EN 10025
- Japanese: JIS G3141, JIS G3131