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Among the aluminum foil materials, 8011 aluminum foil and 8021 aluminum foil are commonly used. Although they are all 8 series aluminum alloys, there are some differences in the composition of the two alloys, so there is a certain difference in performance and use.
1. Chemical composition comparison
8011 aluminum foil chemical composition (mass fraction) /%
| Alloy | Si | Cr | Cu | Mn | Fe | Zn | Mg | Ti | Others | Al | |
| Single | Total | ||||||||||
| 8011 | 0.5~0.9 | ≤0.05 | ≤0.10 | ≤0.20 | 0.6~1.0 | ≤0.10 | ≤0.05 | ≤0.08 | 0.05 | 0.15 | Rem |
8021 aluminum foil chemical composition (mass fraction) /%
Alloy | Si | Cr | Cu | Mn | Fe | Zn | Mg | V | Ti | Others | Al | |
Single | Total | |||||||||||
8021 | ≤0.15 | - | ≤0.05 | - | 1.2~1.7 | - | - | - | - | 0.05 | 0.15 | Rem |
It can be seen that the 8011 aluminum foil contains Mn and Mg elements, and the 8021 aluminum foil does not contain these two elements, so the strength and corrosion resistance of the 8011 aluminum foil is higher than that of the 8021 aluminum foil.
Second, as the bottle cap material, the application field is different
8021 aluminum foil is suitable for capping materials with better deep drawing performance, and 8011 aluminum foil is often used for yogurt caps and other places.
Third, as a medicinal aluminum foil, the use is also different
The 8011 aluminum foil has high strength, but the elongation and puncture resistance in the same state are lower than that of the 8021 aluminum foil. In pharmaceutical packaging, the aluminum foil coating on the back of the capsule board is mostly 8021 aluminum foil, while the blister aluminum and tropical aluminum have higher sealing and elongation requirements for the material, and more are 8021 aluminum foil and 8079 aluminum foil.
Fourth, the scope of application and price are different
8011 aluminum foil is more widely used, and can be used in many fields such as pharmaceutical packaging, food packaging, lunch box materials, tape foil, cable foil, bottle cap materials, etc., and the price is relatively favorable. 8021 aluminum foil is mostly used in the packaging of relatively high lithium battery soft aluminum film and blister medicine, and the price is more expensive.
Henan Henry is a professional aluminum foil manufacturer. It is one of the top ten aluminum foil manufacturers in China. Whether you want to buy medicinal aluminum foil, bottle caps, lunch boxes, tape foil, battery soft foil or cable foil, Henan Henry will be your best choice.
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