Cold‑Rolled Coils (CRC)

Description

1. Product Overview
Cold‑Rolled Coils (CRC) are high‑precision flat steel products manufactured by pickling, cold‑rolling, and annealing hot‑rolled steel to achieve superior surface finish, dimensional accuracy, and mechanical consistency. They serve as the foundational material for automotive body panels, home appliances, metal furniture, and electrical enclosures, where surface quality and tight tolerances are non‑negotiable. With exceptional formability and uniform thickness, CRC enables manufacturers to reduce downstream processing costs while improving end‑product performance—making it a strategically critical commodity in global industrial supply chains.

2. Key Specifications & Technical Characteristics

• Chemical Composition (typical, per JIS G3141 / EN 10130):

  • C: ≤0.12%

  • Mn: ≤0.60%

  • P: ≤0.040%

  • S: ≤0.035%

• Grades: SPCC, SPCD, SPCE, DC01, DC03, DC04, or equivalent drawing and deep‑drawing qualities

• Purity / Consistency: Fully killed steel, inclusion‑controlled for uniform mechanical properties

• Physical Characteristics:

  • Form: Coiled sheet

  • Thickness range: 0.12 mm – 3.50 mm

  • Width range: 600 mm – 1,500 mm

  • Coil ID: 508 mm / 610 mm

  • Coil weight: 5–15 MT (customizable)

  • Surface finish: Bright (semi‑gloss) / Matte / Oiled or dry as specified

• Packaging Options:

  • Anti‑rust VCI paper interleaving

  • Galvanized steel strapping

  • Waterproof reinforced wrapping + wooden pallet / export seaworthy package

• Shelf Life: 6 months indoors (≤60% humidity, no corrosive atmosphere); 3 months in standard warehouse without oxidation

3. Core Industrial Applications

• Automotive (Tier 1 & Tier 2): Inner and outer body panels, chassis components, oil pans, wheel covers – CRC provides superior surface quality for painting and welding, reducing rework by 15‑20% versus hot‑rolled substitutes.

• Home Appliances: Refrigerator shells, washing machine drums, microwave cavities, air conditioner casings – excellent deep‑drawability allows complex shapes without cracking, lowering scrap rates.

• Construction & Metal Furniture: Office filing cabinets, shelving systems, light gauge framing – uniform thickness enables automated roll‑forming at higher line speeds (up to +12% efficiency).

• Electrical Enclosures & Electronics: Switchgear boxes, server racks, battery casings – magnetic properties and clean surface ensure reliable grounding and powder coating adhesion.

Why better than alternatives: Compared to hot‑rolled steel, CRC eliminates scale, delivers ±0.02 mm thickness tolerance, and provides a ready‑to‑paint surface, eliminating pickling and rough grinding steps. Compared to galvanized steel where corrosion is not critical, CRC reduces material cost by 18‑25% without sacrificing formability.

4. Competitive Advantages

• Quality consistency: Real‑time thickness control (AGC system) and inline surface defect detection (laser/hole inspection) – guaranteed zero edge wave, center buckle, or sliver defects above 0.05 mm depth.

• Supply reliability: Dual‑source mill partnerships (South Korea, Japan, China, Vietnam) with 99.2% on‑time delivery rate over 24 months.

• Logistics capability: Rail + sea consolidation from major ports (Busan, Shanghai, Rotterdam, Houston) – lead times 4‑6 weeks for standard grades.

• Price competitiveness: Fixed quarterly pricing with automatic market‑aligned adjustments for bulk contracts; freight absorption above 500 MT per month.

• Sustainability: Up to 42% recycled content in feedstock; ISO 14001‑certified mills; Scope 3 emissions data available upon request.

• Technical support: Full material test reports (MTR), weldability/suitability guides, and dedicated metallurgical engineer for troubleshooting.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT per grade and thickness (one full container load)

• Loading capacity (per 20ft standard container): Up to 22 MT (theoretical); practical max per container type:

  • 20ft dry container: 20 MT

  • 40ft dry container: 25 MT (coils must be split into two stacks)

  • 40ft HC: 26 MT (with reinforced flooring)

• Note: For coil weights >12 MT, use flat rack or open‑top containers (capacity up to 28 MT, subject to road/port crane limits).