The Natural Aluminum Surface

Mill finish refers to the raw, unprocessed surface of aluminum profiles as they exit the extrusion die. This finish is the natural appearance of aluminum, characterized by its silver tone. Since it undergoes no additional surface treatment, some die lines and marks are often visible, giving it an untreated and functional look.

Key Features of Mill Finish

• Natural Appearance: Displays the natural silver color of aluminum.
• No Surface Treatment: Retains die lines and marks from the extrusion process.
• Oxidation Over Time: Develops a thin layer of aluminum oxide (white scale / powder) when exposed to air and moisture.

Applications

Mill finish aluminum profiles are primarily used in functional or non-decorative contexts:

• Inner Parts of Machines: Ideal for components not exposed to humid air.
• Interior Applications: Common in areas without decorative requirements.
• Cost-Effective Option: Suitable for projects where surface finish is not a priority.

Advantages

• Economical: No additional processing reduces cost.
• Lightweight and Durable: Retains all the inherent benefits of aluminum.
• Versatile: Suitable for applications prioritizing function over aesthetics.

While mill finish aluminum offers a raw and natural look, it is an excellent choice for functional, cost-sensitive, and internal applications, meeting practical needs without additional surface treatments.