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3003 aluminum coil is one of the most widely used aluminum alloys in the 3xxx series. It is a non-heat-treatable aluminum alloy with manganese as the primary alloying element, offering a balanced combination of formability, corrosion resistance, and cost efficiency.
Because of its stable performance and ease of processing, 3003 aluminum coil is commonly selected for general-purpose applications where moderate strength and good workability are required.
Why 3003 Aluminum Coil Is Widely Used
Compared with carbon steel, stainless steel, and other aluminum alloys, 3003 aluminum coil has several practical characteristics that influence material selection:
Lightweight Material
Density is about one-third of steel, making it suitable for weight-sensitive structures.
Good Corrosion Resistance
Naturally forms an oxide layer, performing well in atmospheric and mildly corrosive environments without additional coating.
Excellent Formability
Easily bent, rolled, stamped, and profiled, making it ideal for coil-based continuous processing.
Stable Mechanical Properties
Provides sufficient strength for non-structural applications while remaining easy to fabricate.
Cost-Effective Alloy
Lower cost compared with high-strength aluminum alloys and stainless steel.
Common Specifications
Thickness: 0.2 mm – 6.0 mm
Width: 100 mm – 2600 mm
Inner Diameter (ID): 508 mm / 610 mm
Surface: Mill finish, coated, anodized, embossed
Edge: Mill edge or slit edge
Typical Chemical Composition of 3003 Aluminum (wt%)
| Element | Content (%) |
|---|---|
| Aluminum (Al) | ≥ 96.7 |
| Manganese (Mn) | 1.0 – 1.5 |
| Silicon (Si) | ≤ 0.60 |
| Iron (Fe) | ≤ 0.70 |
| Copper (Cu) | 0.05 – 0.20 |
| Zinc (Zn) | ≤ 0.10 |
| Others | ≤ 0.15 |
Mechanical Properties (Typical Range)
| Property | Typical Value |
|---|---|
| Tensile Strength | 110 – 285 MPa |
| Yield Strength | 40 – 145 MPa |
| Elongation | 10% – 35% |
| Density | ~2.73 g/cm³ |
| Melting Point | ~655 °C |
*Mechanical properties vary depending on temper.
Temper Conditions & Their Practical Meaning
3003 aluminum coil is supplied mainly in O and H tempers:
O (Annealed):
Maximum ductility, suitable for deep drawing and complex forming.
H12 / H14 / H16 / H18:
Increasing strength achieved through cold working, used when higher rigidity is required.
3003 aluminum cannot be strengthened by heat treatment; strength adjustment relies on cold work.
Processing Characteristics of 3003 Aluminum Coil
Cold Rolling Compatibility
Suitable for continuous rolling, slitting, and leveling lines.
Weldability
Can be welded using common aluminum welding methods.
Surface Treatment Adaptability
Compatible with coating, anodizing, embossing, and laminating processes.
Dimensional Stability
Good flatness after processing, suitable for sheet conversion.
Typical Applications of 3003 Aluminum Coil
3003 aluminum coil is widely used in:
Roofing and wall cladding systems
Aluminum composite panels (ACP)
Heat exchanger fins and components
HVAC ducting and insulation jacketing
Packaging and container components
General sheet metal fabrication
3003 Aluminum Coil vs Other Common Materials
vs Carbon Steel:
Lighter weight, better corrosion resistance, easier forming.
vs Stainless Steel:
Lower strength and corrosion resistance, but significantly lower cost and weight.
vs 5052 Aluminum:
3003 offers better formability, while 5052 provides higher strength and marine resistance.
FAQ – 3003 Aluminum Coil
Q1: Is 3003 aluminum coil suitable for outdoor use?
Yes, it performs well in outdoor and atmospheric environments.
Q2: Can 3003 aluminum coil be anodized?
Yes, but appearance may vary compared with 6xxx series alloys.
Q3: Is 3003 aluminum coil food safe?
It is commonly used in food-related applications when appropriate surface treatment is applied.
Q4: What is the most common temper for 3003 aluminum coil?
H14 is widely used due to its balance of strength and formability.