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Help CenterSteel Coil & Strip & Cold Rolled Coil，SPCC、DC01、St12、SPCD、DC02、St13
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Detailed Specification of Cold Rolled Steel Coil
Cold Rolled Steel Coil (CRC) is produced by using hot rolled steel coil as raw material. After pickling to remove oxide scale, it is continuously rolled at room temperature. Featuring smooth surface, precise dimension, high strength and excellent stamping performance, it is a fundamental metal material widely used in automobile, home appliance and light industry industries.
1. Production Process
Main process flow: Hot rolled steel coil → Pickling → Cold rolling → Annealing (optional) → Finishing → Slitting & Packaging
Cold rolling: Continuous rolling at normal temperature to control thickness accurately with smooth surface free of oxide layer.
Annealing treatment: Non-annealed hard cold rolled coil owns high hardness but poor ductility; annealed coil restores good ductility and stamping property to meet complex forming requirements.
2. Main Technical Specifications
2.1 Dimension Range
Thickness: 0.06–3.2mm, conventional size 0.3–2.5mm
Width: 750–1650mm, common width 1000/1250/1500mm
Inner diameter: 508mm (mainstream), 610mm
Coil weight: 6–26 tons, regular weight 6–13.5 tons
2.2 Common Steel Grades
| Grade | Steel Grade | Main Application |
|---|---|---|
| General Grade | SPCC, DC01, St12 | Simple bending and stamping, home appliance shell, furniture |
| Drawing Grade | SPCD, DC02, St13 | Medium stamping, electrical fittings, hardware parts |
| Deep Drawing Grade | SPCE, DC03, St14 | Deep drawing forming, automotive inner panel, oil tank |
| Extra Deep Drawing Grade | SPCEN, DC04-DC06 | Complex deep drawing, automotive outer panel and covering parts |
2.3 Mechanical Properties
Yield Strength: 180–280MPa
Tensile Strength: ≥270MPa
Elongation: 28%–38%
Hardness: Hard rolled coil HRB＞90; annealed coil HRB 50–70
2.4 Surface Quality Grade
FA (O1): Ordinary surface with slight defects allowed
FB (O3): High-grade surface, suitable for painting and electroplating
FD (O5): Premium surface without defects, used for high-end appearance parts
3. Product Features
Superior surface finish: Smooth surface without oxide scale and rust, easy for painting and electroplating.
High dimensional accuracy: Strict thickness and width tolerance with good flatness.
Adjustable physical performance: Annealed coil has good ductility; hard rolled coil has high strength and hardness.
Excellent processability: Available for bending, punching, welding and coating.
4. Application Fields
Automobile Industry: Car body panel, door, engine hood, trunk lid
Home Appliance Industry: Refrigerator & washing machine shell, air conditioner backboard
Light Industry & Hardware: Metal furniture, cabinet, door and window, stamping parts
Electric & Electronic Industry: Motor housing, electrical cabinet, precision instrument panel
Construction Decoration: Ceiling board, partition board, ventilation pipe, storage shelf
5. Packaging & Marking
Adopt horizontal packaging, wrapped with anti-rust paper and waterproof plastic film, fixed with iron corner protectors for moisture-proof and rust-proof. Clear marks including steel grade, size, coil weight, batch number, execution standard and production date are attached for traceability.
6. Execution Standards
Chinese Standard: GB/T 708, GB/T 11253
Japanese Standard: JIS G3141
European Standard: EN 10130
American Standard: ASTM A1008
7. Delivery Condition
Annealed cold rolled coil: Good ductility, ideal for stamping and bending
Hard cold rolled coil: High hardness, used for simple processing or galvanizing raw material
Finished coil: Better surface quality and higher dimensional precision
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