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Help CenterSteel Coil & Strip & Cold Rolled Steel Coil，GB/T 708、GB/T 5213、GB/T 11253、JIS G3141、EN 10130、DIN 1623
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Steel Coil & Strip & Cold Rolled Steel Coil，GB/T 708、GB/T 5213、GB/T 11253、JIS G3141、EN 10130、DIN 1623NegotiableMOQ: 5 Metric Tons -
Steel Coil & Strip & Cold Rolled Steel Coil，GB/T 708、GB/T 5213、GB/T 11253、JIS G3141、EN 10130、DIN 1623NegotiableMOQ: 5 Metric Tons
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Cold Rolled Steel Coil (CRC)
1. Product Overview
Cold Rolled Steel Coil (CRC) is produced by using hot rolled steel coil as raw material. After pickling to remove scale, the material is rolled at room temperature (below recrystallization temperature) through multiple passes. Subsequent processes such as annealing and tempering are applied to optimize its properties. Different from hot rolled products, it undergoes no high-temperature heating during production, featuring smooth surface, precise dimensions and excellent stamping performance. It is a key base material for precision manufacturing and deep processing.
2. Production Process
Raw Material Preparation: Adopt high-quality hot rolled steel coils, mainly low-carbon steel grades such as Q195 and Q235, with sound surface condition.
Pickling: Remove hot rolling scale and rust thoroughly with acid solution to prevent surface defects in subsequent rolling.
Cold Rolling: Roll the material to target thickness at ambient temperature with a reduction rate of 40% - 80%, while improving surface finish and dimensional accuracy.
Annealing: Hard cold rolled coils have high hardness and poor ductility. Annealing eliminates work hardening and restores plasticity and toughness for bending, stamping and other deep forming processes.
Finishing: Including leveling for flatness and surface roughness control, slitting to required width/length, and oiling for anti-rust treatment before warehousing.
3. Main Specifications
3.1 Dimension Range
Thickness: 0.2 - 4.0 mm (Common: 0.3 - 2.5 mm; customized thickness from 0.06 mm to 4.0 mm available)
Width: 600 - 2000 mm (Common: 1000 - 1800 mm, e.g. 1250 mm, 1500 mm)
Inner Diameter: Standard 508 mm (20 inch) / 610 mm (24 inch)
Coil Weight: Regular 3 - 13.5 tons (Common: 5 - 10 tons; max. 26 tons)
3.2 Dimensional Tolerance (Based on 1.0mm thickness)
Standard Precision: Thickness tolerance ±0.04 mm; Width tolerance 0 ~ +5 mm
High Precision: Thickness tolerance ±0.025 mm; Width tolerance 0 ~ +3 mm, suitable for precision processing
3.3 Surface Quality
Appearance: Silvery metallic luster, free of scale, pitting, scratches and peeling. Surface roughness Ra: 0.4 - 1.5 μm.
Surface Grade:
Grade Ⅰ: Super clean surface without visible defects, for automotive outer panels and high-end home appliance panels.
Grade Ⅱ: Slight scattered fine scratches or color difference permitted, for home appliance inner panels, furniture and hardware products.
Grade Ⅲ: Minor non-impairing defects allowed, for general stamping parts and packaging materials.
4. Common Grades & Execution Standards
4.1 Equivalent Grades
| Application | GB (China) | JIS (Japan) | DIN/EN (Europe) |
|---|---|---|---|
| General Purpose | DC01 | SPCC | St12 / EN10130 |
| Drawing Grade | DC02 | SPCD | St13 |
| Deep Drawing Grade | DC03 | SPCE | St14 |
| Extra Deep Drawing Grade | DC04 | SPCEN | St15 |
| Super Extra Deep Drawing Grade | DC05 / DC06 | - | - |
4.2 Main Standards
National Standard (GB): GB/T 708, GB/T 5213, GB/T 11253
International Standards: JIS G3141, EN 10130, DIN 1623
5. Mechanical Properties (Annealed Condition, Typical Values)
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) (L0=50mm) |
|---|---|---|---|
| DC01 / SPCC | ≤280 | 270-410 | ≥28 |
| DC02 / SPCD | ≤240 | 270-390 | ≥30 |
| DC03 / SPCE | ≤240 | 270-370 | ≥34 |
| DC04 / SPCEN | ≤210 | 270-350 | ≥38 |
Features: Moderate strength, excellent plasticity and formability. Resistant to cracking during bending and deep drawing, ideal for complex component manufacturing.
6. Product Advantages
Premium Surface Quality: Free of scale, easy for electroplating, spraying and enamelling with strong coating adhesion.
High Dimensional Accuracy: Strict tolerance control for thickness, width and flatness, compatible with automatic precision production lines.
Excellent Formability: Good ductility and toughness after annealing, perfect for stamping, bending and deep drawing.
Uniform Material Structure: Compact internal structure and fine grains ensure stable mechanical performance during processing.
Good Anti-rust Performance: Surface oiled for temporary rust protection, convenient for storage and transportation.
7. Application Fields
Automotive Industry: Car body inner & outer panels, doors, hoods, chassis parts, wheel hubs (mainly DC04 / SPCE for deep drawing).
Home Appliances: Shells of refrigerators, washing machines, air conditioners, microwave panels, electric cooker liners and other structural parts.
Furniture Industry: Metal furniture, office desks, cabinets, shelves and decorative panels.
Hardware Products: Tools, locks, lamps, kitchenware, stamping parts and packaging barrels.
Electronic Industry: Enclosures for precision instruments, electronic structural parts, battery casings and terminals.
Construction & Decoration: Interior decorative panels, suspended ceilings, partition walls, ventilation ducts and elevator interior panels.
8. Packaging & Marking
8.1 Packaging
Standard Package: Horizontal packing with inner moisture-proof paper + plastic film, reinforced with steel protectors and steel straps to avoid collision and moisture.
Premium Package: Additional waterproof film and foam padding for high-end products such as automotive and home appliance panels.
Custom Package: Vertical packing, enhanced anti-rust oil and vacuum packaging are available on request.
8.2 Marking
Labels are attached on both inner and outer sides of coils, clearly marked with steel grade, dimension, standard, batch number, weight, production date and mill logo for full traceability.
9. Delivery & Storage
Delivery Condition: Annealed (most common), hard rolled and skin passed. Hard rolled coils are mainly used for simple bending or as raw material for galvanizing.
Storage Requirements: Store indoors in dry, ventilated and moisture-proof warehouse. Avoid outdoor stacking, rain and direct sunlight. Place coils horizontally to prevent deformation and keep away from corrosive substances.
Lead Time: 5 - 7 working days. Regular specifications are in stock; customized products are available upon production.
10. Quality Assurance
Raw Material Control: Adopt premium hot rolled coils from major domestic steel mills to guarantee original quality.
Full Inspection: Strict tests on dimension, surface, mechanical properties and chemical composition. Mill test certificates are provided with each shipment.
After-sales Service: Professional technical support, sample confirmation and quality problem handling are available.
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