Aluminum Closure Sheet: 3104 VS 3105

In the field of bottle cap manufacturing, 3104 and 3105 aluminum alloys are commonly used bottle cap materials, each showing unique performance and application characteristics. A deep understanding of their characteristics will help companies make better decisions when choosing materials.

3104 aluminum

3104 aluminum foil belongs to the Al-Mg-Mn series of heat-treatable non-strengthening alloys. In its chemical composition, the magnesium content is between 0.8 and 1.2, and the manganese content is between 0.8 and 1.4. This composition gives it many excellent properties.

Deep drawing performance: 3104 has good deep drawing performance and can reduce the amount of material used in the process of thinning, stretching and lightweighting. In the production process of the material of the can lid and bottom, strict process control enables the product to have suitable strength and formability. Its tensile strength is greater than or equal to 275MPA, and the elongation can reach 20%. This means that in the complex stamping process, 3104 can better adapt to the mold shape, is not prone to defects such as cracks, and ensures a high pass rate in the production of bottle caps.

Corrosion resistance: For the food and beverage industry, the corrosion resistance of bottle caps is crucial. 3104 can maintain chemical stability with the beverages and foods it contacts, avoiding reactions that affect product quality and safety. When storing acidic beverages (such as carbonated beverages), 3104 bottle caps can resist corrosion for a long time, maintain a good sealing effect, and ensure that the taste and quality of the beverage are not affected.

Wide applications: In addition to the common can lids, 3104 is also used to manufacture lamp holder parts. In the field of construction, 3104 aluminum alloy can be used as exterior wall materials, roofing materials, etc.

3105 Aluminum sheet

3105 aluminum coil belongs to aluminum-manganese alloy and is a type of 3xxx aluminum alloy coil. Its strength is slightly higher than that of industrial pure aluminum, and it performs well in many aspects.

Rust-proof and conductive properties: 3105 aluminum has good rust-proof properties, which can effectively prevent bottle caps from rusting in a humid environment and ensure the long-term beauty of the bottle appearance. Due to the addition of 0.3% copper element, its conductivity can reach 41%. This feature has advantages in some packaging scenarios that require electrostatic protection, and can effectively avoid the safety hazards caused by static electricity accumulation.

Processing performance: In the annealed state, 3105 aluminum has high plasticity. Its good weldability enables it to be reliably connected with other parts during the production of bottle caps. When manufacturing modular bottle caps, 3105 can be firmly combined with other metal or plastic parts through welding to form a complete bottle cap structure.

Wide applications: 3105 alloy is widely used in the manufacture of sealing packaging for products such as alcoholic beverages, beverages, cosmetics and medicines. These industries have high requirements for the sealing, safety and appearance quality of bottle caps, and 3105 can meet these requirements well. In cosmetic packaging, 3105 bottle caps can be designed with exquisite appearance to enhance the overall grade of the product; in pharmaceutical packaging, its good sealing and chemical stability can ensure the quality and safety of the medicine during the shelf life.

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