1-series aluminum coils and 3-series aluminum coils are two common aluminum coil alloy series, and they have some differences in alloy composition and characteristics.

1 series aluminum coil:
Series 1 aluminum coils belong to the pure aluminum series, mainly composed of aluminum elements, usually adding a small amount of impurity elements as alloying agents. Common 1-series aluminum coil alloys include 1100, 1050 and 1060. The following are the characteristics of 1 series aluminum coils:

High purity: Series 1 aluminum coils have high purity, usually more than 99% aluminum content.
Lightweight: Series 1 aluminum coils are lightweight and have low density, so they have a good lightweight effect.
High conductivity: Series 1 aluminum coils have good conductivity and are often used in electronics, electrical and other fields.
Excellent corrosion resistance: Series 1 aluminum coils have good corrosion resistance to most non-acidic media.
Good machinability: Series 1 aluminum coils are easy to process and form, and are suitable for various processing techniques, such as stamping and stretching.

3 series aluminum coil:
The 3-series aluminum coil belongs to the aluminum-manganese alloy series, which is mainly composed of aluminum and manganese elements, and a small amount of other alloying elements are added. Common 3-series aluminum coil alloys include 3003, 3004 and 3105. The following are the characteristics of 3 series aluminum coils:

Good strength: 3-series aluminum coils have higher strength and hardness, and have more structural strength than 1-series aluminum coils.
Oxidation resistance: 3-series aluminum coils have good oxidation resistance and are suitable for outdoor environments and applications with high durability requirements.
Good formability: 3-series aluminum coils have good formability and are suitable for deep drawing and forming processes.
Corrosion resistance: 3 series aluminum coils have good corrosion resistance to most non-acidic media.

1-series aluminum coils and 3-series aluminum coils differ in alloy composition and properties. Series 1 aluminum coils are pure aluminum, featuring high purity, light weight, high conductivity and good corrosion resistance, and are suitable for electronics, packaging and other fields. Series 3 aluminum coil is an aluminum-manganese alloy with high strength, hardness and oxidation resistance, suitable for structural applications and outdoor environments.