AA1100, AA3003, AA3005 Coated Aluminium Coil

01/05 2026

Coated aluminum coils are essential materials across diverse industries, valued for their durability, lightweight properties, and excellent corrosion resistance. Among the various grades, AA1100, AA3003, and AA3005 coated aluminum coils is know due to their distinct characteristics and tailored alloy compositions.

Coated aluminum coils are aluminum strips that come with a protective organic or inorganic coating layer. This coating serves to improve corrosion resistance, weather durability, aesthetics, and functional attributes like paintability and adhesion.

Different Aluminum Association (AA) alloys dictate the coil’s mechanical properties, temper, and chemical makeup, making certain grades better suited for specific purposes. Below we explore AA1100, AA3003, and AA3005 coated aluminum coils in detail.

Alloy Compositions and Chemical Properties

The following table summarizes chemical compositions of AA1100, AA3003, and AA3005 alloys as per ASTM B209 standards, characterizing each alloy’s basic elements (% by weight):

Element	AA1100	AA3003	AA3005
Aluminum (Al)	99.0+	96.8-99.0	96.8-99.0
Copper (Cu)	≤0.05	≤0.10	≤0.20
Manganese (Mn)	≤0.05	1.0-1.5	0.8-1.5
Silicon (Si)	≤0.40	≤0.6	≤0.35
Iron (Fe)	≤0.95	≤0.7	≤0.7
Zinc (Zn)	≤0.10	≤0.10	≤0.10
Magnesium (Mg)	N/A	≤0.10	0.2-0.8

AA1100 is almost pure aluminum, prized for excellent corrosion resistance, thermal and electrical conductivity but lower strength. The addition of manganese in AA3003 and magnesium in AA3005 enhances strength and work-hardening capabilities, with both grades maintaining good corrosion resistance.

Temper and Mechanical Specifications

Coated aluminum coils undergo tempering processes influencing hardness, strength, and ductility. The commonly provided temper classes and performance parameters are summarized:

Alloy	Standard Temper	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
AA1100	H14, H16, H18	90-120	35-55	10-35
AA3003	H14, H16, H18	95-145	55-90	8-20
AA3005	H14, H16, H18	100-165	50-110	8-15

H14: Partial hard, obvious strength increase, moderate elongation.
H16: Higher strength, less ductile.
H18: Full hard, maximum strength, minimal elongation – suitable when high rigidity is required.

Functions and Unique Features

AA1100 Coated Aluminum Coil

As a commercially pure aluminum coil, AA1100 offers:

Superior corrosion resistance, especially against chemical exposures.
High malleability and formability, making it ideal for complex shapes.
Excellent thermal and electrical conductivity.
Strong adhesion to coating layers ensuring long-lasting surface finishes.

AA3003 Coated Aluminum Coil

This alloy’s combination of manganese provides:

Enhanced mechanical strength without sacrificing corrosion resistance.
Improved resistance to coastal and mildly corrosive environments.
Good workability suitable for bending, tinning, and welding.
Effective performance in applications subject to moderate structural stress.

AA3005 Coated Aluminum Coil

AA3005 incorporates magnesium, leading to:

Increased strength compared to AA1100 and AA3003.
High resistance to atmospheric corrosion.
Good fatigue-resistant properties.
Stability in exterior environments, resistant to rain, UV, and pollutants.

The coating on these coils often includes layers like primers, PE/PVDF finishes, or polyester coatings customized to match functional and aesthetic needs – critical in roofing, cladding, and automotive applications.

Application Areas

Due to their distinct properties and coating advantages, AA1100, AA3003, and AA3005 coated aluminum coils see extensive use in:

Construction Industry: Wall panels, roofing sheets, ventilation ducts, rain gutters, and curtain walls benefit from corrosion resistance and flexible formability.
HVAC Systems: Ducting components, tubing cladding, and heat exchanger enclosures.
Automotive and Transportation: Lightweight body panels, trims requiring strength and weather durability.
Electrical Equipment: Protective casings, components where thermal conductivity is prized, particularly for AA1100.
Packaging and Food Industry: Containers and foils where hygiene, chemical inertness, and surface finishes are critical.
Signage and Displays: Superior coloration, gloss finish, and long-lasting printability of coated surfaces aid visual and marketing executions.

Implementation Standards and Quality Specifications

Acceptance of coated aluminum coils follows industry-standard testing regulations emphasizing dimensional consistency, coating adherence, and mechanical properties. Commonly referenced standards include:

Standard Code	Description
ASTM B209	Aluminum and aluminum-alloy sheet and plate
ASTM D3359	Adhesion Porcelain Chip Resistance Test
GOST 17622-91	Technical requirements for aluminum coils
EN 13523	Paint coating tests for substrates (adhesion, impact, bend tests)
ISO 9001	Quality management system for manufacturing

Customers are encouraged to confirm specification compliance regarding thickness tolerance, coating weight (usually 15~25 microns per side for organic coatings), and finish required upfront.

Feature	AA1100	AA3003	AA3005
Main Alloying Elements	≥99% Al (virtually pure)	Al + 1.0-1.5% Mn	Al + 0.8-1.5% Mn, 0.2-0.8% Mg
Typical Temper	H14, H16, H18	H14, H16, H18	H14, H16, H18
Corrosion Resistance	Excellent	Very good	Very good to Excellent
Tensile Strength (MPa)	90-120	95-145	100-165
Coating Options	PE, PVDF, Polyester, Metallic finishes	PE, PVDF, Polyester, Metallic finishes	PE, PVDF, Polyester, Metallic finishes
Surface Finish	Smooth, bright, matt	Smooth, textured, customized	Smooth or textured
Primary Applications	Electrical, Chemical, Roofing, HVAC	Roofing, Cladding, Furniture, Duct	Roofing, Cladding, Automotive, Exterior panels