DC04 DC06 Deep Drawing Cold Rolled Carbon Steel Coil 0.3mm-3mm Automotive Grade

Our DC04 and DC06 deep drawing cold rolled carbon steel coils deliver the exceptional formability and surface quality demanded by automotive stamping, appliance manufacturing, and precision metal forming industries. Produced through a carefully controlled sequence of pickling, cold reduction, electrolytic cleaning, and hydrogen atmosphere annealing, these coils achieve the optimal combination of low yield strength, high elongation, and uniform grain structure that enables complex deep drawing operations. The advanced cold rolling mill with automatic gauge control ensures thickness consistency within microns across the entire coil width and length. Whether you are stamping automotive door inner panels, refrigerator compressor housings, or intricate electronic enclosures, our deep drawing grade coils provide the reliable, repeatable performance that high-volume manufacturing operations depend on for first-pass quality and minimal downtime.

• Exceptional Deep Drawing Performance: DC04 and DC06 grade cold rolled carbon steel coils are specifically engineered for demanding deep drawing and extra deep drawing applications. With elongation values exceeding 38% (DC04) and 40% (DC06), these coils excel in forming complex geometries without cracking, thinning, or surface defects. The fine-grained ferritic microstructure ensures uniform material flow during multi-stage drawing operations.
• Ultra-Smooth Surface Finish: Achieved through precision cold rolling and bright annealing processes, the surface finish reaches Ra 0.6-1.2 μm roughness levels. This mirror-like quality is essential for automotive exterior panels, appliance housings, and consumer electronics enclosures where post-processing painting or coating requires a flawless substrate.
• Tight Dimensional Tolerances: Thickness tolerance of ±0.02mm and width tolerance of ±1mm ensure consistent material behavior in automated press lines. The precise gauge control across the full coil width eliminates stamping variations that would otherwise require press adjustments between coil changes, maximizing production efficiency and minimizing scrap rates.
• Optimized for Automotive Standards: Our DC04 and DC06 coils meet or exceed EN 10130, JIS G3141, and ISO 3574 specifications for cold rolled low carbon steel sheet. They are qualified for automotive OEM supply chains including body panels, structural stampings, seat frames, fuel tank components, and chassis reinforcement parts where reliability and consistency are non-negotiable.
• Versatile Annealing Options: Available in both batch annealed (BA) and continuous annealed (CA) conditions to match your specific forming requirements. Batch annealing provides optimal deep drawability with maximum elongation, while continuous annealing offers uniform mechanical properties across the entire coil length for high-speed progressive die operations.
• Oil-Coated Corrosion Protection: A light uniform rust-preventive oil film is applied to all surfaces, providing 3-6 months of indoor corrosion protection without interfering with subsequent welding, bonding, or coating processes. Custom oil types and application weights are available to match your downstream manufacturing requirements.
• Complete Quality Traceability: Each coil is identified with a unique heat number and coil ID that traces back to the original steelmaking heat, providing complete metallurgical genealogy. This traceability system supports ISO/TS 16949 quality management requirements for automotive supply chains and facilitates root cause analysis when needed.

DC04 and DC06 deep drawing cold rolled carbon steel coils are the material of choice for applications requiring severe forming without intermediate annealing. Primary applications include automotive body panels (door inners, roof panels, quarter panels, floor pans), fuel tank halves, oil sumps and pans, brake booster shells, washing machine drums and cabinets, refrigerator liners and door panels, kitchen sink bowls, fire extinguisher bodies, compressed gas cylinder halves, lighting fixture housings, and deep-drawn electronic chassis components. The exceptional drawability permits single-stage forming of geometries that would require multi-stage processing with lesser grades, reducing tooling investment and per-part manufacturing cost. These grades are also widely specified for hydroforming applications where uniform elongation under biaxial stress is critical to part integrity.

Each coil is protected with anti-rust VCI paper and heavy-duty waterproof polyethylene wrapping, then secured with circumferential and radial steel strapping. Edge guard rings protect coil edges from mechanical damage during handling and transit. Coils are palletized on wooden skids or steel cradles for forklift handling. Container loading includes timber blocking, steel lashing straps, and dunnage to prevent shifting. Every shipment includes complete mill test certificates per EN 10204 3.1, surface quality inspection reports, dimensional conformance certificates, and fumigation certificates where required. Our quality system is certified to ISO 9001:2015 with additional compliance to IATF 16949 automotive quality management standards. Third-party inspection and testing by SGS, Bureau Veritas, or TUV Rheinland is available at customer request.