Aluminum Circle

What is Aluminum Circle ?

Aluminum circle (or aluminium disc) is a semi-finished product made from aluminum or an aluminum alloy. As the name suggests, it is a flat, circular-shaped piece of metal that has been precisely cut and rolled to a specific thickness and diameter.

It is the primary starting material for manufacturing a wide range of spun or deep-drawn aluminum products, most notably cookware like pots, pans, and rice cookers.

Shape: Perfectly round (circular).
Form: It can be supplied in various tempers:
O (Annealed) Temper: Soft, malleable, and ideal for deep spinning and forming.
H (Strain-Hardened) Temper: Harder and stronger, used for applications requiring more rigidity.
Alloy: Commonly made from alloys like 1070, 1100 (pure aluminum) for excellent formability and corrosion resistance, or 3003 (manganese alloy) for higher strength and workability.

The Aluminum Circle manufacturing process typically involves these steps:

Melting & Casting: Aluminum ingots are melted and cast into large rectangular slabs.
Hot Rolling: The slab is heated and rolled to reduce its thickness into a coil.
Cold Rolling: The coil is further rolled at room temperature to achieve the precise desired thickness and a smooth surface finish.
Circle Blanking: The cold-rolled aluminum coil is fed into a blanking machine equipped with a circular die, which punches out perfect circles, similar to a cookie cutter.
Edge Trimming (Optional): The edges may be trimmed and smoothed to remove any burrs.
Annealing (Optional): The circles are heated in a furnace to soften them (achieving O temper) if required for the end application.

Aluminium Circle Common Applications :
Aluminum circles are incredibly versatile, but their most famous use is in cookware manufacturing:
Pots and Pans: The circles are placed on a spinning lathe and formed into the shape of a pot.
Lids for Cookware
Non-stick Fry Pans
Rice Cooker Bowls
Pizza Pans and Baking Trays
Other applications include:
Signage: For road signs, nameplates, and decorative signs.
Lampshades & Lighting Reflectors: Their good reflectivity makes them ideal for light fixtures.
Traffic Signs: Their durability and resistance to corrosion are key advantages.
Chemical Equipment: Lining for tanks and containers due to aluminum's corrosion resistance.
Decoration: Used for making decorative items, badges, and tags.

Advantages of Using Aluminum Circles
Excellent Formability: They can be spun, deep-drawn, and stamped into complex shapes without cracking.
Lightweight: Aluminum is about three times lighter than steel.
Good Thermal Conductivity: Heats up quickly and evenly, which is perfect for cookware.
Corrosion Resistance: Forms a protective oxide layer that prevents rust.
Hygienic & Non-Toxic: Safe for contact with food.
Attractive Appearance: Can be easily polished, anodized, or painted for a finished look.
Recyclable: 100% recyclable without any loss of quality, making it an environmentally friendly choice.