Round Aluminum Sheet Disc Plate 0.5/1/1.5/2~5mm Thick Aluminium Discs 50~300mm

Measure the opening or mounting area your disc needs to cover or fit into, then select the next size up if you need overlap, or an exact match if it must fit flush inside a recess. All diameters listed are outer diameters. The discs are solid with no center hole, so you can drill to any center dimension you need.

For purely decorative applications such as engraving blanks or craft medallions, 0.5 mm – 1 mm is typically sufficient and keeps weight low. For load-bearing or structural uses — such as backing plates, cover flanges, or heat spreaders — 2 mm – 5 mm provides meaningfully more rigidity. When in doubt, choose a thicker option; aluminum is easy to thin down with a sander or mill but cannot be added back.

Aluminum naturally forms a thin oxide layer that provides moderate corrosion resistance in dry and sheltered outdoor conditions. For prolonged direct exposure to rain, salt spray, or humidity, we recommend applying an anodizing treatment or a compatible outdoor-rated coating after purchase. The bare mill-finish surface is not rated for marine or continuously wet environments without additional treatment.

Yes. Aluminum is one of the more machinable metals and works well with standard drill bits, hole saws, jigsaws with metal-cutting blades, lathes, and CNC routers. Use cutting fluid or lubricant when drilling thicker variants (3 mm and above) to extend tool life and achieve cleaner holes. Always clamp the disc securely before machining.

Yes. Aluminum sheet discs are well-suited for both anodizing and powder coating. Anodizing enhances corrosion resistance and allows color dyeing; powder coating adds a durable decorative finish. Both processes require the surface to be clean and free of oils before treatment. The mill finish on these discs can be lightly sanded or degreased prior to finishing.

Weight varies significantly with both diameter and thickness. As a general reference, a 50 mm × 1 mm aluminum disc weighs approximately 5–6 g, while a 300 mm × 5 mm disc can weigh approximately 950–1,000 g (roughly 2.1 lb). If weight is a critical factor for your application, contact us to confirm the specific variant weight before ordering.

Each listing variant is priced and sold per individual piece (Qty: 1). If you need multiple discs of the same or different sizes, simply adjust the quantity in your cart or add multiple variants. For larger volume requirements, contact us to discuss availability.