DC05 COIL
DC05 Cold Rolled Steel Coil – Technical Specifications and Applications
DC05 cold rolled steel coil (DC05 COIL) is a deep-drawing-grade, low-carbon steel coil based on European standards (EN 10130). It offers excellent formability and surface quality and is widely used in the automotive, home appliance, and hardware industries. Below are its key parameters, processing characteristics, and typical applications.
1. DC05 Steel Coil Core Parameters (EN 10130 Standard)
Performance Parameters Typical Value Range Unit Description
Tensile Strength (Rm) 250 - 360 MPa Low strength, suitable for deep drawing
Yield Strength (Rp0.2) 120 - 210 MPa Easy to plastically deform
Elongation (A80) ≥ 38% - High elongation
Hardness (HV) 80 - 120 HV Soft, easy to process
Thickness Range 0.3 - 3.0 mm, 0.5-2.0 mm is common
Width Range 600 - 1500 mm Custom slitting available
Note:
Chemical Composition: C ≤ 0.06%, Mn ≤ 0.40%, P ≤ 0.025%, S ≤ 0.025%, Al ≥ 0.015% (deoxidized).
Supply status: annealed (+A) or surface passivated (+SP), optional glossy (smooth) or roughened (controllable roughness).
2. Processing characteristics of DC05 steel coils
(1) Stamping formability
Suitable for complex processes such as deep drawing, stretching, bending, etc., such as car doors, fuel tanks, etc.
Key indicators:
Plastic strain ratio (r value) ≥1.6 (the higher the resistance to thinning, the stronger the ability).
Erichsen value ≥9.0mm (test deep drawing performance).
(2) Welding performance
Low carbon content (C≤0.06%) makes it suitable for resistance spot welding (RSW) and laser welding, but heat input needs to be controlled to avoid deformation.
(3) Surface treatment compatibility
Electroplating/spraying: Degreasing and phosphating treatment (such as galvanizing, electrophoretic coating) are required first.
Direct use: High surface quality (Ra≤0.8μm) can be used for exposed parts (such as home appliance panels).
3. Typical application areas
(1) Automobile manufacturing
Covering parts: door inner panels, engine hoods, trunk lids (require high formability + surface quality).
Structural parts: seat frames, fuel tank auxiliary parts (welding + stamping).
(2) Home appliances and electronics
Casings: refrigerator side panels, washing machine drums, microwave oven casings (surface sprayable).
Precision parts: battery casings, electronic brackets (high stamping precision requirements).
(3) General hardware and packaging
Containers: metal cans, food packaging boxes (require high elongation and crack prevention).
Architectural decoration: lightweight metal ceilings, billboard frames (non-load-bearing).
4. Comparison of DC05 steel coil vs. other grades
Grade Tensile strength (MPa) Elongation (%) Applicable scenarios
DC01 270 - 410 ≥ 28 Simple stamping (bracket)
DC04 260 - 380 ≥ 34 Medium stamping
DC05 250 - 360 ≥ 38 Deep drawing of complex parts (car doors, home appliances)
DC06 240 - 350 ≥ 42 Ultra-deep drawing (fuel tank)
Selection suggestion:
If the stamping depth is normal, choose DC04 (lower cost);
If extremely high formability is required, upgrade to DC06.
5. Key points of procurement and quality control
(1) Key test items
Mechanical properties: tensile test (Rm, Rp0.2, A80).
Formability test: cupping test (Erichsen), r value determination.
Surface quality: no scratches, scale, roller marks (in accordance with EN 10130 standard).
(2) Supplier selection
International major manufacturers: ArcelorMittal, ThyssenKrupp, Posco.
Domestic mainstream: Baosteel, Ansteel, Shougang (need to confirm equivalent grades such as SPCE).
(3) Price factors
Affected by iron ore and energy costs, it is usually 5-10% more expensive than DC04, but cheaper than stainless steel/aluminum coils.
Summary
DC05 cold-rolled steel coil is an ideal choice for balancing cost, strength and formability, especially suitable for:
✅ Automotive panels (doors, hoods)
✅ Home appliance housings (refrigerators, washing machines)
✅ Precision metal stampings (containers, brackets)
If further strength reduction is required (such as fuel tanks), DC06 can be selected; if higher strength is required, consider HX340 or DP steel.
