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Steel Coil & Strip & Cold Rolled Coil，DCO1、DCO3、DC04、DC05NegotiableMOQ: 5 Metric Tons -
Steel Coil & Strip & Cold Rolled Coil，DCO1、DCO3、DC04、DC05NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip & Cold Rolled Coil，DCO1、DCO3、DC04、DC05NegotiableMOQ: 5 Metric Tons
-
Steel Coil & Strip & Cold Rolled Coil，DCO1、DCO3、DC04、DC05NegotiableMOQ: 5 Metric Tons
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Steel Coil & Strip & Cold Rolled Coil，DCO1、DCO3、DC04、DC05NegotiableMOQ: 5 Metric Tons
Detailed Specification of Cold Rolled Coil
1. Product Introduction
Cold Rolled Coil (CRC) is produced by taking hot rolled coil as raw material. After pickling to remove scale, the material is cold rolled at room temperature (below recrystallization temperature), followed by annealing, temper rolling and other processes to form high-precision thin steel coil. Products delivered in sheet form are called cold rolled steel sheets, while coiled products are named cold rolled steel strips.
2. Production Process
Hot Rolled Coil → Pickling (Descaling) → Cold Continuous Rolling → Annealing (Stress Relief) → Temper Rolling → Finishing → Packaging & Warehousing
Cold Continuous Rolling: Rolling at room temperature, free of oxide scale, with smooth surface and precise dimensions.
Annealing: Restore plasticity and toughness, and improve stamping performance.
Temper Rolling: Enhance flatness and uniform surface roughness of the steel sheet.
3. General Specifications
3.1 Dimension Range
Thickness: 0.2–4.0 mm (Common: 0.3–3.0 mm)
Width: 600–2000 mm (Common: 800–1850 mm)
Inner Diameter: φ508 mm / φ610 mm
Coil Weight: 6–13.5 MT
3.2 Dimensional Tolerance (Take 1.0 mm base sheet as example)
Thickness Tolerance: ±0.03 mm
Width Tolerance: 0–+2 mm
Flatness: ≤3 mm/m
4. Material Grades & Executive Standards
4.1 Common Grade Comparison
| GB/T 5213 | EN 10130 | JIS G3141 | DIN 1623 | Application |
|---|---|---|---|---|
| DC01 | DC01 | SPCC | ST12 | General Purpose |
| DC03 | DC03 | SPCD | ST13 | Shallow Drawing |
| DC04 | DC04 | SPCE | ST14 | Deep Drawing |
| DC05 | DC05 | SPCF | ST15 | Extra Deep Drawing |
4.2 Main Chemical Composition (wt%, DC01/SPCC)
| C | Mn | P | S |
|---|---|---|---|
| ≤0.15 | ≤0.60 | ≤0.035 | ≤0.035 |
4.3 Typical Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| DC01 | ≤280 | 270–430 | ≥28 |
| DC03 | ≤240 | 270–410 | ≥34 |
| DC04 | ≤210 | 270–390 | ≥38 |
5. Product Features
Excellent Surface Quality: Free of oxide scale and pits with smooth surface (Ra 0.4–1.5 μm), suitable for electroplating, spraying, color coating and other secondary processing.
High Dimensional Accuracy: Strict tolerance on thickness, width and flatness, ideal for precision manufacturing.
Superior Mechanical Performance: Balanced strength, toughness and stamping property to meet complex forming requirements.
Stable Material Uniformity: Dense internal structure with low anisotropy, avoiding cracking during processing.
6. Surface Quality Grade
Grade Ⅰ (High Grade): Defect-free surface, applied to automotive outer panels, home appliance shells and other high-end appearance parts.
Grade Ⅱ (Standard Grade): Slight scratches and color difference allowed, for inner panels and structural parts.
Grade Ⅲ (Industrial Grade): Minor tiny defects permitted, for general stamping and welding components.
7. Application Fields
Automotive Industry: Car doors, engine hoods, chassis parts and interior brackets.
Home Appliance Industry: Shells and inner containers of refrigerators, washing machines and air conditioners.
Hardware Products: Anti-theft doors & windows, metal furniture, lamps, kitchenware and metal drums.
Architectural Decoration: Elevator cars, indoor partitions, suspended ceilings and ventilation ducts.
Industrial Containers: Food cans, chemical barrels and battery casings.
Substrate for Coating & Plating: Base material for hot-dip galvanized, galvalume and color coated steel sheets.
8. Packaging & Marking
8.1 Packaging
Adopt horizontal packaging with moisture-proof and rust-proof treatment, wrapped with plastic film and fixed with steel bands. Ordinary, fine and customized packaging are available.
8.2 Marking
Inner labels (on coil inner side) and outer labels (on packaging) are attached. Marked contents include steel grade, dimension, batch number, weight, production date, executive standard and manufacturer information.
9. Delivery Terms
Delivery Lead Time: 5–7 days. Regular specifications are in stock; special specifications can be customized.
Shipping: Moisture-proof and anti-collision measures are taken during transportation.
Quality Assurance: Products comply with national and international standards. Mill test certificates are provided, and third-party inspection is acceptable.
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