1 / 2 Inch Diameter Anodized Aluminum Disc

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Anodized aluminum discs are well known for their light weight, corrosion resistance, and excellent thermal conductivity, making them indispensable components in modern industry and daily applications. Among them, 1/2 inch (approximately 12.7 mm) diameter anodized aluminum discs are especially popular due to their precise dimensions and wide versatility. They are widely used in cookware, electronics, lighting, construction, and decorative applications.

What Is an Anodized Aluminum Disc?

An anodized aluminum disc is produced by applying an anodizing surface treatment to an aluminum disc. This electrochemical process forms a dense aluminum oxide layer on the surface, providing the material with several key advantages:

Corrosion Resistance: The oxide layer effectively prevents oxidation and extends service life.
Wear Resistance: Increased surface hardness improves scratch and abrasion resistance.
Aesthetic Appeal: Electrolytic coloring enables a wide range of colors such as black, red, purple, and more.
High Thermal Conductivity: Thermal conductivity remains as high as approximately 93% of base aluminum, making it suitable for cooking and heat dissipation applications.

Common Sizes and Alloy Options

HAOMEI Aluminum supplies anodized aluminum discs with thicknesses ranging from 0.5 to 6.0 mm. Common diameters include 1/2 inch, 12 inch, 14 inch, 24 inch, and 36 inch, with customization available upon request.

Common Aluminum Alloys

1100 Aluminum: 99% purity, ideal for cookware and decorative applications
3003 Aluminum: Excellent formability, suitable for stamping and deep drawing
5052 / 5083 Aluminum: Marine-grade corrosion resistance, ideal for outdoor and harsh environments

Technical Specifications of Aluminum Discs

Alloy	1100, 3003, 5052, 5083, 6061, 8011
Temper	O - H112
Outer Diameter	1/2 inch (12.7 mm)
Diameter Tolerance	±0.01 mm to ±0.05 mm (higher precision available)
Thickness	0.3 mm - 5.0 mm
Thickness Tolerance	±0.02 mm to ±0.1 mm
Flatness	≤ 0.05 mm
Roundness	≤ 0.03 mm
Anodizing Type	Standard anodizing / Hard anodizing (optional)
Oxide Layer Thickness	5-25 μm
Surface Hardness	HV 200-400 (depending on coating thickness)
Surface Colors	Silver, black, red, blue, gold (custom colors available)
Packaging	Standard export wooden cases or pallets
MOQ	1-3 tons

Performance Characteristics of Anodized Aluminum Discs

Lightweight with High Strength: Low density combined with suitable alloy selection and surface treatment meets various structural and functional requirements.
Excellent Corrosion Resistance: The anodized layer resists moisture, oxidation, and mild chemical exposure, suitable for both indoor and outdoor use.
Enhanced Wear Resistance: Increased surface hardness significantly reduces scratching and abrasion.
High Thermal Conductivity: Aluminum conducts heat efficiently, approximately 60% that of copper.
Weather Resistance: Sealed anodized dyes provide strong UV resistance, maintaining color vibrancy even after long-term sun exposure.
Decorative Value: Uniform metallic luster and rich color options enhance aesthetic and branding appeal.
Electrical Insulation: The anodized layer is electrically insulating, serving as a natural barrier against short circuits or electrostatic discharge in electronic applications.
Safe and Eco-Friendly: The anodizing process uses no heavy metals. Finished products are lead-free, nickel-free, non-toxic, and easy to clean without leaving fingerprints.

Anodizing Process Overview

Anodizing is the core value of 1/2 inch aluminum discs, and the typical process includes:
Degreasing and Cleaning: Removal of oil and contaminants to ensure surface cleanliness
Chemical Pretreatment: Surface conditioning for uniform anodizing results
Electrolytic Oxidation: Formation of a dense aluminum oxide layer
Coloring (Optional): Black, silver, red, blue, and other custom colors
Sealing Treatment: Enhances corrosion resistance and service life

The anodic oxide layer thickness generally ranges from 5 to 25 μm, offering excellent protection without significantly affecting dimensional accuracy-ideal for small, precision components.

Applications of Anodized Aluminum Discs

1. Cookware Manufacturing

Used in pot lids, cookware bodies, pressure cookers, and frying pans, ensuring uniform heat distribution due to excellent thermal conductivity.

2. Lighting and Electronics

Lamp Reflectors: High reflectivity improves lighting efficiency in embedded and industrial lighting systems.

Electronic Heat Sinks: Efficient heat dissipation ensures stable equipment operation.

Capacitor Housings: Provide electromagnetic shielding and component protection.

3. Construction and Decoration

Interior Decoration: Suitable for ceilings and furniture panels, offering high surface hardness and stain resistance.

Outdoor Signage: Excellent weather resistance makes them ideal for road signs and public facilities.

4. Automotive and Aerospace

Fuel Tank Caps and Aircraft Components: 5xxx and 6xxx series alloys provide high strength and corrosion resistance for demanding environments.

Pricing and Customization

Because these are products with small batch or high customization requirements, the price often depends on the thickness, color complexity (e.g., custom colors are more expensive than standard colors), and minimum order quantity (MOQ). If you require extremely high precision or complex custom engraving, it is best to choose a supplier that offers precision CNC cutting and professional laser engraving services.