8021 aluminum foil is a common aluminum alloy material with the following characteristics:

8021 aluminum alloy composition:

Aluminum (Al): About 99%.
Silicon (Si): about 0.05%.
Iron (Fe): about 0.35%.
Copper (Cu): about 0.10%.
Manganese (Mn): about 0.10%.
Magnesium (Mg): about 0.05%.
Zinc (Zn): about 0.10%.

8021 aluminum foil physical properties:
Density: 2.71 g/cm³.
Melting point: about 660°C.
Linear expansion coefficient: 23.1 μm/m °C (20-100 °C).
Thermal conductivity: 125-150 W/m·K.

8021 aluminum foil alloy features:

Barrier performance: 8021 aluminum foil has excellent barrier performance and can effectively isolate external environmental factors such as moisture, oxygen, odor, light and microorganisms.
Corrosion resistance: It has good corrosion resistance and can resist the erosion of various chemical substances.
Hygienic and safe: in line with international hygienic standards and food safety requirements, non-toxic, tasteless, suitable for pharmaceutical and food packaging and other fields.
Suitable for high temperature environment: It has high temperature resistance and is suitable for high temperature sterilization and heat sealing packaging.
Mechanical behavior:

Strength: 8021 aluminum foil has good strength and can maintain stable mechanical properties during processing and use.
Extensibility: With good extensibility, it can be easily folded, cut, formed and sealed.
Machinability: easy to process and form, suitable for various processing techniques, such as stamping, stretching, etc.

The alloy composition and characteristics of 8021 aluminum foil make it a high-quality material widely used in pharmaceutical packaging, food packaging and electronics, providing good barrier properties, mechanical properties and corrosion resistance.