8011, 8021 and 8079 aluminum foils are widely used materials in the 8XXX series of aluminum alloys. Due to differences in composition, performance and processing characteristics, they occupy an important position in the fields of packaging, medicine, industry, etc. All three have good corrosion resistance and processing performance, but there are significant differences in strength, flexibility and specific application scenarios.
The following will compare and analyze them in detail in terms of alloy composition, performance characteristics and typical uses.
1. Alloy composition
8011 aluminum foil: The main alloying elements are iron and silicon, iron 0.5 - 0.9%, silicon 0.4 - 0.8%. The content of other trace elements is low, and it has good comprehensive performance.
8021 aluminum foil: iron content 0.8 - 1.2%, silicon 0.3 - 0.7%. But it contains a higher proportion of trace elements, which enhances tear resistance and toughness. 8079 aluminum foil: It is an extremely pure aluminum material with an aluminum content of up to 99.97%, iron 0.9 - 1.3%, silicon 0.05 - 0.3%, and few impurities. Contains small amounts of other elements, emphasizing flexibility and ductility.
2. Mechanical properties
8011 aluminum foil: moderate strength, good tensile strength and ductility, suitable for general packaging purposes.
8021 aluminum foil: slightly higher strength, excellent tear resistance and sealing, more suitable for pharmaceutical and high barrier packaging.
8079 aluminum foil: characterized by good ductility and flexibility, suitable for scenarios requiring ultra-thin aluminum foil.
3. Processing performance
8011: Good forming performance, suitable for secondary processing such as compounding, coating and printing.
8021: Excellent processing performance, especially suitable for deep drawing and composite processes.
8079: Best processing performance, suitable for difficult processing requirements, especially the production of extremely thin aluminum foil.
4. Corrosion resistance
8011: It has good corrosion resistance and can meet the requirements of ordinary packaging and household foil.
8021: It has outstanding corrosion resistance, especially in pharmaceutical packaging where there are higher requirements for moisture and oxidation resistance.
8079: Corrosion resistance is similar to 8011, but it focuses more on the advantages of toughness and ductility.
5. Elongation and puncture resistance
8011 aluminum foil: Compared with 8079 aluminum foil, the elongation and puncture resistance are relatively lower.
8021 aluminum foil: It has high elongation and puncture resistance, and is suitable for applications that require high performance of these two properties.
8079 aluminum foil: It also has good elongation and is suitable for applications requiring higher ductility.
6. Application areas
8011 aluminum foil: used for food packaging, industrial packaging and building insulation.
8021 aluminum foil: used for pharmaceutical packaging, high-end food packaging and moisture-proof packaging of electronic products.
8079 aluminum foil: used in capacitor manufacturing, electronic labels and electronic shielding materials.
In summary, 8011, 8021 and 8079 aluminum foils each have their own unique composition, performance and application occasions. The choice of aluminum foil should be determined according to the specific use environment and performance requirements.
8011 aluminum foil, 8021 aluminum foil and 8079 aluminum foil are one of the key products of MC Aluminum. The thickness range of production is 0.018mm-0.2mm, and the width can be controlled in 100-1650mm according to customer requirements. The product surface is clean, uniform in color, and has no spots. , flat and without voids, exported to many countries and regions overseas, with preferential prices and short delivery time.