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Help CenterSteel Coil & Strip & Cold Rolled Steel Coil，GB/T 709、GB/T 15675、EN 10130、JIS G3141、ASTM A1008
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Cold Rolled Steel Coil (CRC) Product Specification
1. Product Overview
Cold rolled steel coil is produced by taking hot rolled steel coil as raw material. After pickling to remove scale, the material is continuously rolled at room temperature (below recrystallization temperature). Compared with hot rolled steel coil, it features smooth surface, high dimensional accuracy and superior strength and hardness, serving as a key basic material for automotive, home appliance and light industries.
2. Production Process
Hot rolled steel coil → Pickling (descaling) → Cold continuous rolling → Annealing (optional, to improve ductility) → Finishing → Slitting & Packaging
Key processes: Cold continuous rolling (to enhance precision and strength at room temperature); Annealing (to eliminate work hardening and recover stamping performance)
Delivery form: Coiled material or cut flat sheets
3. Main Technical Specifications
3.1 Dimension Range
Thickness: 0.06–3.2 mm (commonly 0.2–2.0 mm)
Width: 750–1650 mm (commonly 1000–1500 mm)
Inner diameter: 508 mm / 610 mm (standard: 508 mm)
Max outer diameter: 2000 mm
Coil weight: 3–26 tons (commonly 6–15 tons)
3.2 Common Grades & Stamping Classes
| Grade Class | GB / EN Standard | JIS Standard | Main Characteristics |
|---|---|---|---|
| Ordinary Grade | DC01 | SPCC | Suitable for simple bending and welding, limited ductility |
| Drawing Grade | DC02 | SPCD | For medium stamping and moderate deformation |
| Deep Drawing Grade | DC03 | SPCE | Excellent deep drawability, for automotive inner panels and home appliance casings |
| Extra Deep Drawing Grade | DC04 / DC05 | SPCEN | Superior deep drawability, for complex outer panels |
| Super Extra Deep Drawing Grade | DC06 | — | Interstitial-Free (IF) steel, ultimate stamping performance |
3.3 Typical Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation after Fracture (%) |
|---|---|---|---|
| DC01 | ≤280 | 270–410 | ≥28 |
| DC03 | ≤240 | 270–390 | ≥34 |
| DC04 | ≤210 | 270–370 | ≥38 |
3.4 Surface Quality
Surface finish: Bright (B), Matte (M), Skin-passed (S). Free of scale and pits; surface roughness Ra ≤ 1.6 μm
Surface grade: FA (Premium), FB (Standard), FC (General), matching different coating requirements
4. Executive Standards
Chinese Standard: GB/T 709, GB/T 15675
European Standard: EN 10130
Japanese Standard: JIS G3141
American Standard: ASTM A1008
5. Product Features
Excellent surface condition: No oxidation formed during cold rolling, high smoothness, ideal for electroplating, spraying and enameling.
High dimensional accuracy: Thickness tolerance ±0.02 mm, width tolerance ±1 mm, good flatness.
Adjustable mechanical properties: Annealed products have good ductility; tensile strength can be customized within 270–980 MPa.
Wide processing adaptability: Available for shearing, stamping, bending and welding for complex forming.
6. Application Fields
Automotive industry: Door panels, side panels, trunk lids, hoods, cross members and longitudinal beams (DC04–DC06)
Home appliance industry: Casings of refrigerators, washing machines and air conditioners, microwave oven inner tanks (DC01–DC03)
Light industry & construction: Furniture components, decorative panels, ventilation ducts, lamp housings
Electronics & electrical machinery: Small motor cores, electrical enclosures, precision stamped parts
Substrate for coated steel: Raw material for hot-dip galvanized, galvalume and color coated steel coils
7. Packaging & Marking
Packaging: Horizontal packing with moisture-proof anti-rust film, cardboard and steel strapping to prevent collision and rust.
Marking: Grade, dimension, weight, batch number, executive standard and production date are marked on coil surface.
8. Storage & Transportation
Storage: Store indoors in dry and ventilated areas with relative humidity ≤ 60%. Keep away from rain, moisture and corrosive substances; place horizontally or vertically.
Transportation: Cover with moisture-proof materials. Handle with care to avoid impact, dragging, surface scratch and deformation.
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