3004 Aluminum Foil

3004 aluminum foil is a widely utilized aluminum alloy material, primarily composed of aluminum, manganese, and magnesium. Below are its key characteristics:

1. Physical Properties
- Density: approximately 2.72 g/cm³, making it a lightweight material.
- Melting Point: around 640°C.
- Thermal Conductivity: approximately 160 W/(m·K), indicating excellent thermal conductivity.
- Electrical Conductivity: roughly 40% IACS (International Annealed Copper Standard), suggesting moderate electrical conductivity.
- Coefficient of Thermal Expansion: about 23.1 × 10⁻⁶/°C (between 20-100°C).
- Reflectivity: exhibits high reflectivity for both light and heat, suitable for thermal insulation and reflective applications.

2. Mechanical Properties
The mechanical properties of 3004 aluminum foil vary depending on its temper state (e.g., annealed, hard). Typical values include:

- Annealed State:
 - Tensile Strength: approximately 150-180 MPa.
 - Yield Strength: approximately 60-80 MPa.
 - Elongation: approximately 10-20%, demonstrating good ductility.

- Hard State (H18):
 - Tensile Strength: approximately 200-250 MPa.
 - Yield Strength: approximately 180-220 MPa.
 - Elongation: approximately 2-5%, characterized by high hardness but reduced ductility.

- Other States (H22, H24):
 - Intermediate strength and ductility between the annealed and hard states.

3. Corrosion Resistance
3004 aluminum foil exhibits superior corrosion resistance in most environments, particularly in humid and weakly acidic or alkaline conditions. A dense oxide film (Al₂O₃) forms on the surface, further enhancing its corrosion resistance. This makes it suitable for food packaging and chemical applications.

4. Processing Performance
- Formability: Easily press-formed, stretched, and bent, ideal for complex shape processing.
- Weldability: Compatible with common welding methods such as TIG and MIG welding, offering good weldability.
- Machinability: Moderate machining performance; appropriate cutting tools and lubricants should be used.

5. Fatigue Performance
3004 aluminum foil possesses moderate fatigue strength, making it suitable for dynamic load applications. Its fatigue life under cyclic loading depends on stress levels and surface treatment.

6. Performance in Typical Applications
- Packaging Industry: Excellent barrier and corrosion resistance, suitable for food and pharmaceutical packaging.
- Construction Industry: Moderate strength and good weather resistance, ideal for roofing and wall materials.
- Automotive Industry: Lightweight and corrosion-resistant, suitable for fuel tank and radiator components.

In summary, 3004 aluminum foil combines lightweight and excellent thermal conductivity with adjustable strength and ductility across different temper states. Its outstanding corrosion resistance and processing properties make it a versatile material widely used in packaging, construction, automotive, and other industries.