3004 Color Coated Aluminum Coil

3004 color coated aluminum coil is a new type of metal material produced using 3004 aluminum alloy as the base metal. After cleaning, chromizing, roller coating, and high-temperature baking, its surface is coated with various paint layers such as PE and PVDF.

3004 aluminum alloy belongs to the Al-Mn series. As a commonly used anti-rust aluminum sheet, it contains a small amount of magnesium, making it part of the aluminum-magnesium-manganese family.

3004 coated aluminum coil not only maintains the lightweight characteristics of aluminum but also offers slightly higher strength than 3003 color coated aluminum coil. With surface coating treatment, it has excellent weather resistance and decorative effects. It is widely used in building curtain walls, roofing systems, home appliance shells, food packaging, ceilings, roller shutter doors, and more.

Common Tempers

• H14: Semi-hard, suitable for stamping and bending parts.

• H16: Higher strength, suitable for stretching and roll forming.

• H18: Full hard temper, used for applications requiring high rigidity.

• O: Annealed soft temper, ideal for deep drawing and stretching.

Specifications of 3004 Coated Aluminum Coil

Mechanical Properties

Chemical Composition (%)

Features of 3004 Color Coated Aluminum Coil

1. High Toughness & Anti-Deformation Base Metal

With a manganese content of 1.0-1.5%, it provides outstanding tensile strength, elongation, impact resistance, and bending resistance. Suitable for large-span roofing and complex forming environments without cracking.

2. Excellent Corrosion Resistance

3004 alloy itself has good rust resistance. Combined with a high-performance coating, it can resist more than 4,000 hours of salt spray, ultraviolet aging, acid and alkali corrosion, and is not easy to fade or powder in coastal, high temperature and high humidity environments.

3. High Strength and Commutation

Compared to pure aluminum, 3004 alloy boasts higher strength while retaining excellent deep-drawing and forming properties, making it easy to process by shearing, stamping, and bending.

4. Excellent Decorative Properties

The coating offers a rich variety of colors, providing over 80 standard colors, including RAL color charts and swatches. Gloss levels are selectable, and it can mimic various textures (such as wood grain and stone grain) to meet diverse architectural aesthetic needs.

5. Lightweight and Energy-Saving

Aluminum has a low density and is lightweight, which helps reduce the structural load on buildings and lower transportation costs.

6.Environmentally Friendly and Weather-Resistant

The coating has excellent weather resistance, is not prone to fading, and the aluminum is 100% recyclable, meeting green building material standards.

Types of Color Coating and Their Characteristics

3004 color-coated aluminum coils can be coated with different types of coating systems depending on the application. The most common types are as follows:

1. PE (Polyester) Coated Aluminum Coil

PE coatings, based on weather-resistant polyester, offer advantages such as good adhesion, high gloss, and a variety of colors, making them widely used in interior ceilings, roller shutters, advertising boards, and appliance back panels.

• Lifespan: 5-10 years

• Features: Low cost, strong decorative effect, moderate weather resistance.

2. PVDF (Fluorocarbon) Coated Aluminum Coil

PVDF coatings are made of fluorocarbon resin (Kynar 500 or Hylar 5000), offering excellent resistance to UV rays, corrosion, and aging, making them suitable for long-term outdoor use.

• Service life: 20-30 years

• Features: Long-lasting color, resistant to acid and alkali corrosion, and excellent self-cleaning properties.

• Applications: Building exterior walls, roofing systems, curtain wall panels, marine components, etc.

3. Epoxy Coating

It is mainly used for special purposes such as food packaging, beverage cans, and the inner walls of cosmetic containers. It has excellent adhesion and chemical stability and meets food contact safety standards.

Technical Parameters of Color Coated Aluminum Coil

Applications of 3004 Color Coated Aluminum Coil

1. Building Decoration

Roofing systems: Suitable for large public buildings like airports, stations, stadiums

Curtain wall panels: For ACP, honeycomb panels, and solid aluminum panels

Interior decoration: Ceilings, partition walls, and interior cladding

2. Industrial Manufacturing

Home appliances: Refrigerator side panels, air-conditioner panels, washing machine bodies

Transportation: Car and train interior panels, insulation panels

Other uses: Grain silos, storage tanks, packaging containers

Production Process

The production process of 3004 color-coated aluminum coils includes:

1. Base aluminum coil selection

2. Alkali cleaning and degreasing

3. Chemical pretreatment (chromium / non-chromium)

4. Coating application (primer + topcoat)

5. Baking and curing

6. Cooling and recoiling

7. Final inspection

After these processing steps, the surface of the aluminum coil is coated with paint of various colors, which can be categorized into single-coat, double-coat, or even triple-coat processes depending on the application requirements.

Coating thickness:

• Single coat: 4μm-20μm;

• Double coat: 25μm-28μm;

• Triple coat: 35μm-38μm.