3003 Aluminum Coil

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Description
Selection Guide
Aluminum Tempers

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.

Performance Requirement Service Environment Typical Applications Recommended Alloys Technical Notes
Excellent formability & deep drawing Indoor, mild outdoor Food packaging, roofing sheets, deep-drawn components 1050, 1060, 1100 Very high ductility, low strength, ideal for cold forming
Balanced strength & corrosion resistance Outdoor, humid environments Roofing, cladding, insulation jacketing 3003, 3004 Mn-alloyed series, good workability and corrosion resistance
Higher strength for structural use Outdoor, light structural loads Transportation panels, industrial housings 5052, 5754 Mg-alloyed, stronger than 3xxx, excellent corrosion resistance
Marine & high corrosion resistance Marine, coastal, chemical exposure Shipbuilding, tanks, pressure vessels 5083, 5086 Outstanding resistance to seawater corrosion
High strength & machinability Mechanical load, precision parts Automotive parts, machine components 6061, 6082 Heat-treatable, good balance of strength and machinability
Maximum strength-to-weight ratio High-stress structural environments Aerospace, high-performance structures 7075 Very high strength, reduced corrosion resistance
Good thermal & electrical conductivity Heat transfer, electrical use Heat exchangers, bus bars, radiators 1050, 1070 High aluminum purity improves conductivity
Temper Processing Condition Tensile Strength (MPa) Elongation (%) Formability Level Typical Coil Applications
O Fully annealed ~90–110 25–35% High Deep drawing, spinning, food & chemical packaging
H12 Light strain hardened ~110–130 15–25% Medium–High Light forming, insulation jacketing
H14 Half-hard ~140–160 6–12% Medium Roofing sheets, cladding, general forming
H24 Strain hardened & stabilized ~150–170 8–15% Medium Pre-painted coils, building materials
T6 Heat-treated & artificially aged ~240–310* 6–10% Low Structural parts (limited coil applications)

*T6 values mainly apply to heat-treatable alloys such as 6061.

Note: Actual mechanical properties shall be subject to the specific alloy, temper, thickness, and applicable standard (ASTM / EN / GB).

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