8011 H14/H16/H18 Aluminum Coil For Bottle Caps

8011 aluminum coil belongs to the aluminum-silicon (Al-Si) alloy system, which is a typical industrial pure aluminum extension alloy with good formability, corrosion resistance and machinability. It is often used in scenarios where strength requirements are not high but processing performance is required.

Characteristic of 8011 aluminum coil:

– Corrosion Resistance

8011 alloy surface is easy to form a dense oxide film, and has excellent corrosion resistance in the atmosphere, fresh water and mild chemical media, suitable for outdoor or humid environments.

– Surface treatment adaptability

Easy to perform surface treatment such as anodizing and painting to improve aesthetics and protection.

– Processing Performance

8011 H14: Suitable for light forming processing such as shallow drawing and bending (such as stamping parts).

8011 H16: Suitable for medium-strength bending, rolling and other processing.

8011 H18: High hardness, suitable for rigid parts that need to maintain shape, but the difficulty of forming increases.

8011 aluminum coil contains silicon (Si) elements, while maintaining the corrosion resistance of the aluminum matrix, the hardness is adjusted through work hardening (H14/H16/H18), which just matches the multi-dimensional requirements of bottle caps.

Specific applications of 8011 H14/H16/H18 aluminum coil for bottle caps

1. 1. Beverage bottle caps (such as beer, carbonated beverages)

Common temper: H16/H18

Feature advantages:

– H16: Hardness 40-50HB, tensile strength 130-160MPa, can be formed into a threaded structure by stamping, and can maintain elastic deformation when tightened to ensure sealing;

– H18: Hardness 50-60HB, higher strength, suitable for bottle caps that need to resist external force extrusion (such as sports drink bottle caps) to avoid loosening during transportation;

– Corrosion resistance: The surface oxide film can resist acidic substances in beverages (such as carbonic acid, fruit juice), preventing metal rust from affecting the contents.

Typical cases:

Aluminum beer bottle caps have become the mainstream, replacing traditional iron caps due to their light weight and low temperature resistance (no brittle cracking at -20℃); carbonated beverage bottle caps require H18 state to resist internal air pressure and prevent bottle explosion.

2. 2. Pharmaceutical and cosmetic bottle caps

Common temper: H14/H16

Feature advantages:

H14: Elongation 8-12%, excellent formability, can be processed into thin-walled bottle caps (such as oral liquid bottle caps), and high surface finish, easy to print logos;

H16: Medium hardness is suitable for child-proof opening design (requires specific force to unscrew), and corrosion resistance meets drug contact requirements (such as avoiding reactions with alcohol and drugs);

Environmental protection: 8011 can be recycled and reused, meeting the environmental protection standards of pharmaceutical packaging.

Typical scenarios:

Aluminum pharmaceutical bottle caps are often paired with liner gaskets, using the rigidity of H16 and the elasticity of the gasket to achieve moisture-proof and leak-proof; cosmetic bottle caps (such as essence bottles) are made into special-shaped shapes through the easy processing of H14 to improve aesthetics.

3. 3. Edible oil and condiment bottle caps

Common temper: H16

Characteristic advantages:

Tensile strength 130-160MPa, can withstand repeated opening and closing torque, avoid thread wear;

Resistant to grease corrosion, 8011 alloy has high stability to fatty acid substances, and long-term contact does not affect the sealing performance.

Bottle cap production process and 8011 aluminum coil state selection suggestions:

– Spin-on caps (such as wide-mouth bottle caps): require multiple stretching and forming, select H14 state to ensure ductility;

– Threaded caps (such as bottled water caps): require one-time stamping and forming threads, select H16 state to balance strength and mold loss;

– Anti-theft caps (with tear rings): require a design with a strength difference between the ring body and the cap body, use H18 for the cap body and H14 for the tear ring, which is easy to break when opening.

Industry Trends of 8011 Aluminum Caps

– Lightweight design: Optimize wall thickness (0.2-0.3mm) through H16 state, reducing weight by more than 50% compared with traditional iron caps;

– Anti-counterfeiting technology: Use the anodized properties of aluminum coil surface to make laser anti-counterfeiting logos or color-changing coatings;

– Intelligent integration: Combined with RFID chips (easy to embed in H14 state), used for drug traceability or anti-channeling management.

8011 aluminum coils have become the preferred material for bottle caps in the fields of food, medicine, daily chemicals, etc. due to their adjustable state and comprehensive performance. Especially in high-end packaging scenarios, their metallic texture and functional advantages are difficult to replace.