Because of their superior formability and barrier qualities, aluminum alloy foils 8011 and 8079, which are both part of the 8xxx series, are frequently used in foil applications. Despite their similarities, their compositions and mechanical characteristics differ greatly, which makes them appropriate for different uses.
The advantage of 8011 is its increased ductility (elongation up to 28%), which permits deep drawing and forming without cracking. Perfect for intricate shapes and embossed foil.
Benefit of 8079: Better puncture resistance for pharmaceutical blister packaging due to its higher tensile and yield strength.
8079's barrier qualities against gases and moisture are improved by having more iron and less silicon.
8011 Aluminum vs. 8079 Aluminum Summary of Key Differences
| Feature | 8011 Aluminum | 8079 Aluminum |
| Strength | Higher | Moderate |
| Formability | Good | Excellent |
| Barrier Properties | Good | Superior |
| Ductility | Excellent (≤28% elongation) | Limited (2.2% elongation) |
| Common Applications | Household foil, bottle caps | Flexible packaging, pharmaceutical foils |
Core Chemical Composition of 8011 Aluminum vs. 8079 Aluminum
8079 has higher iron content and lower silicon content, which enhances mechanical properties.
| Element | 8011 Aluminum | 8079 Aluminum |
| Silicon (Si) | 0.50%～0.90% | 0.05%～0.30% |
| Iron (Fe) | 0.60%～1.0% | 0.7%～1.3% (significantly higher) |
| Copper (Cu) | ≤0.10% | ≤0.05% |
| Others | Zinc ≤0.10%, Titanium ≤0.08% | Zinc ≤0.10% |
8011 Aluminum vs. 8079 Aluminum Physical and Mechanical Properties
| Property | 8011 Aluminum | 8079 Aluminum |
| Strength | Medium | Higher (Increased strength due to higher iron content) |
| Ductility | Good | Better (Outstanding elongation and rolling performance) |
| Surface Requirements | Clean and smooth, no pinholes, heavy metals ≤ 0.25 ppm | Thorough degreasing, fewer holes, Dayne value ≥ 32 (for battery applications) |
8011 Aluminum vs. 8079 Aluminum Thermal and Electrical Properties
| Property | 8011 Aluminum | 8079 Aluminum |
| Thermal Conductivity | 210 W/m·K | 230 W/m·K |
| Electrical Conductivity | 56% IACS | 58% IACS |
| Melting Range | 630°C (Solidus) – 650°C (Liquidus) | 640°C (Solidus) – 650°C (Liquidus) |
Uses for 8011 Aluminum
Food packaging is the industry leader because of its superior formability, resistance to corrosion, and adherence to FDA regulations.
Pharmaceuticals: Deep-draw cavities are needed for blister packaging.
Industrial: creating moisture barriers, electrical shielding, and insulation.
Aluminum foil for the home: Soft (O temper), used for storage and packaging.
Uses for 8079 Aluminum
High-barrier packaging: Excellent resistance to oxygen and moisture, ideal for dry foods and sensitive medications.
Bottle caps and beer labels: Strong enough to not distort when sealed.
Premium packaging features an elegant appearance and a high-gloss surface with a thickness of up to 45 microns.
A Useful Comparison of 8011 and 8079 Aluminum
In the following situations, select 8011:
Formability and ductility are essential (e.g., embossed foil, deep-draw containers).
Aluminum foil that is affordable and versatile is required (e.g., household rolls, food trays).
In the following situations, select 8079:
The integrity of the barrier is essential (e.g., moisture-sensitive drugs, long shelf-life foods).
Higher tensile strength is necessary (e.g., bottle caps, industrial seals).
