Among the aluminum foil materials, 8011 aluminum foil and 8021 aluminum foil are commonly used alloys. Although both belong to the 8 series aluminum alloy, there are some differences in the composition of the two, so there are also certain differences in performance and use. But what is the difference between these two kinds of aluminum foil? Next, I will give you a detailed answer：
8011 aluminum foil introduction:
8011 is a series of aluminum plates, belonging to the 8××× series alloy aluminum plates, which are added with Al-Fe-Si elements, and its alloy properties have relatively high advantages in the total alloy elements exceeding 1%. 8011 is often used to make aluminum foil, its performance is better than pure aluminum foil, it is widely used in aluminum foil, and aluminum sheet is not commonly used.
8011 aluminum foil chemical composition:
| 8011 aluminum foil chemical composition (mass fraction) /% | |||||||||||
| Alloy | Si | Cr | Cu | Mn | Fe | Zn | Mg | Ti | Other | AL | |
| Single | All | ||||||||||
| 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 | Margin |
8021 aluminum foil
The thickness range of 8021 aluminum foil produced by MC Aluminum is 0.018mm-0.2mm, and the width can be controlled at 100-1650mm according to customer requirements. 8021 aluminum foil is the main product of food packaging and battery soft packaging aluminum foil. 8021 aluminum foil has excellent moisture-proof performance, light-shielding and extremely high barrier ability. Non-toxic and tasteless, safe and hygienic. Aluminum foil after compounding, printing and gluing is widely used as packaging material.
8021 aluminum foil chemical composition:
| 8021 aluminum foil chemical composition (mass fraction) /% | ||||||||||||
| Alloy | Si | Cr | Cu | Mn | Fe | Zn | Mg | V | Ti | Other | ||
| Single | All | Al | ||||||||||
| 8021 | ≤0.15 | - | ≤0.05 | - | 1.2~1.7 | - | - | - | - | 0.05 | 0.15 | Margin |
The difference between 8011 aluminum foil and 8021 aluminum foil:
1. 8011 aluminum foil contains Mn and Mg elements, but 8021 aluminum foil does not contain these two elements, so the strength and corrosion resistance of 8011 aluminum foil are higher than 8021 aluminum foil;
2. The strength of aluminum foil 8011 is high, but the corresponding elongation and puncture resistance under the same state are lower than 8021 aluminum foil. 8021 aluminum foil and 8079 aluminum foil are mostly used for blister aluminum and tropical aluminum that require higher performance and elongation;
3. The use of aluminum foil 8011 is more extensive, and can be used in many fields such as pharmaceutical packaging, food packaging, lunch box materials, tape foil, cable foil, milk cap material, bottle cap material, etc., while 8021 aluminum foil is relatively expensive and is mostly used for requirements Relatively high lithium battery soft pack aluminum-plastic film and blister drug packaging.