Raw Materials · Aluminum Products

Aluminum Circle

A circle is a blank that has already been cut to the diameter a press needs, so the customer's first operation is forming rather than blanking. Thickness, temper and diameter tolerance decide whether the draw goes cleanly.

Blanks instead of sheet. Circles arrive at the press diameter, so the blanking step and its scrap stay at the rolling mill rather than in the customer's plant.
Temper set for the draw. O and H12 for deep drawing, harder tempers where the part has to hold its shape after forming. The temper is the forming specification.
Diameter and thickness tolerance. Both are quoted, because a circle that is slightly oval does not sit in the die the same way twice.
Earring and surface control. Earing in the draw and surface marks from handling are the two defects that show up after forming, and both are controlled before dispatch.

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The Forms We Supply

Four routes cover most of what we quote. Each is a different mill or process route, so the size window and the lead time differ even where the grade looks similar.

Cookware circles

O-temper circles in 1100 and 3003, sized to the press so the first operation is the draw rather than the blanking.

Pots, pans, pressure cookers

Lighting and reflector blanks

Circles spun or pressed into cones and reflectors, with the thickness and flatness the forming process needs.

Luminaires, reflectors, housings

Electronic and heat-spreader discs

Disks for capacitors, heat sinks and shielding, where conductivity and flatness matter as much as the alloy.

Capacitors, heat sinks, shielding

General press blanks

Standard diameters for plates, badges and general press work, saving a blanking operation on the customer's floor.

Badges, plates, general press work

Size Range and Standard

Circles are quoted by alloy, temper, thickness and diameter. The temper and the thickness tolerance are what decide whether the draw succeeds.

Swipe the table sideways for the notes →

Parameter	Range	What decides it
Thickness	0.3 – 4.0 mm	Deep-drawn cookware uses thicker stock than a lighting reflector.
Diameter	100 – 980 mm	The press sets the diameter; the tolerance on it sets the die clearance.
Temper	O, H12, H14, H16, H18	O for deep drawing, H14–H18 where stiffness matters more than forming.
Alloys	1050, 1060, 1100, 3003, 3004, 5052	1100 and 3003 for cookware, 5052 where strength and corrosion resistance matter.
Surface	Mill, protected film, coated	A protective film prevents press marks on visible cookware surfaces.
Packing	Pallets or crates, interleaved	Circles are packed flat and interleaved so edges are not dented in transit.

Products' Properties and Advantages

Four properties make a circle the right input for a drawing or spinning operation.

Drawability

Soft temper and consistent thickness let the blank flow into the die without tearing, which is the whole point of buying a circle rather than a square blank.

Thickness consistency

A thickness variation across the blank turns into a variation in the wall of the drawn part, and the press cannot compensate for it.

Surface quality

Any mark on the blank is stretched by the draw and appears on the finished part, so surface control is part of the specification.

Conductivity

Aluminum circles are used for heat spreaders and electrical components because the substrate conducts as well as forms.

How We Help Customers

Circle orders are decided by alloy, temper, thickness and diameter. The first two decide whether the part forms at all.

State the forming process

Deep drawing, spinning or blanking change the temper and the thickness tolerance that will work.

Fix alloy and temper together

1050 and 1100 for cookware draws, 3003 for general work, 5052 where the part needs more strength.

Give the diameter with its tolerance

The press and the die clearance set how tight the diameter has to be.

Agree the surface and the packing

Film for visible surfaces, interleaved packing so the edges arrive undented.

Real Applications

Circles are the input to cookware, lighting and any part that starts life as a round blank.

Cookware and kitchenware

Pots, pans and pressure-cooker bodies drawn from O temper circles in 1100 or 3003.

Lighting and reflectors

Housings and reflector blanks where the circle is spun or pressed into a conical form.

Electronics and heat spreaders

Disks for capacitors, heat sinks and shielding, where conductivity and flatness matter.

Signage and industrial parts

Round blanks for plates, badges and general press work where a standard diameter saves a blanking operation.