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As a manufacturer of aluminum circles and aluminum discs, we produce 1100 O mill finish aluminum circles in diameters from 100mm to 1200mm for customers requiring stable formability, clean surfaces, and reliable dimensional consistency. Our 1100 aluminum disc is supplied in the fully annealed O temper, making it suitable for deep drawing, spinning, pressing, stamping, and other cold-forming operations.

The 1100 O aluminum circle is widely used in cookware production, lighting components, traffic signs, decorative parts, chemical equipment, and general industrial fabrication. By controlling raw material selection, rolling, annealing, blanking, inspection, and packaging within our manufacturing process, we help customers maintain consistent downstream production performance.

Product Overview

1100 aluminum is a commercially pure aluminum alloy with a minimum aluminum content of 99.0 percent. It provides good corrosion resistance, thermal conductivity, electrical conductivity, and workability. In O temper, the material has been annealed to obtain high ductility and low forming resistance, which are important for products that require drawing into deep cookware bodies, spinning into lampshades, or pressing into shaped industrial components.

Our mill finish aluminum circle retains the natural rolled surface of the aluminum sheet or coil. It is not painted, anodized, or coated unless a separate finishing requirement is specified. The mill finish is appropriate for customers that will perform their own surface treatment, coating, polishing, non-stick processing, or mechanical finishing after forming.

For customers evaluating alternative 1000 series materials, our 1000 Series Aluminum circle range also includes other commercially pure grades selected for different forming, conductivity, and cost requirements.

Performance Characteristics

Excellent Formability

It offers outstanding deep-drawing properties and ductility, resisting cracking during cold-working processes such as deep drawing, stretching, spinning, and bending. It is particularly well-suited for manufacturing deep-drawn and spun components requiring complex shapes, such as cookware and lamp shades.

Superior Surface Quality

The rolled surface is flat and smooth, free from defects like oil stains or scratches. This high-quality surface responds exceptionally well to subsequent treatments, such as anodizing, polishing, and coating—further enhancing corrosion resistance and achieving an attractive decorative finish.

Good Corrosion Resistance

The surface of 1100 aluminum alloy naturally forms a dense protective oxide layer, providing excellent resistance to atmospheric and marine environments; it withstands salt spray testing for over 240 hours without significant corrosion.

High Thermal and Electrical Conductivity

With a thermal conductivity of approximately 222 W/(m·K) and electrical conductivity of ≥59% IACS, it is an ideal material for applications requiring rapid and uniform heat transfer, such as heat dissipation substrates and cookware.

Lightweight and Eco-friendly

Its low density makes the material lightweight and easy to transport and process. It is 100% recyclable, aligning with green manufacturing principles. Additionally, the material is non-toxic and complies with safety standards for food-contact applications.

Technical Parameters

The following table shows our standard manufacturing range for 1100 O mill finish aluminum circles. Final tolerances and supply conditions can be confirmed according to the customer's drawing, forming method, and end-use requirements.

Chemical Composition and Material Characteristics

The performance of a 1100 aluminum circle begins with alloy chemistry. We use qualified aluminum input material and maintain production controls to ensure that the finished disc meets the agreed alloy specification. The main alloying element in 1100 aluminum is not intentionally added for strengthening; instead, the material remains close to pure aluminum, which supports excellent workability.

In practical manufacturing, the O temper is especially relevant. Annealing reduces the work hardening generated during rolling and produces a softer structure. This allows the aluminum circle to flow more evenly during deep drawing and spinning. For cookware manufacturers, this can help reduce the risk of cracking at the wall, flange, or corner radius when tooling, lubrication, and process parameters are correctly set.

Manufacturing Process for 1100 Aluminum Discs

We manufacture 1100 aluminum circles through a controlled production route designed for forming applications. The process starts with aluminum coil or sheet selected according to alloy, thickness, surface, and mechanical property requirements. Material is then processed through cutting, blanking, annealing, inspection, and packing stages.

1. Raw Material Selection

We select 1100 aluminum coil or sheet with verified chemical composition and suitable surface condition. The input material must have stable thickness, controlled edge quality, and consistency across the coil length. This is essential because variation in the parent material can affect circle flatness, drawing performance, and finished product appearance.

2. Annealing to O Temper

For O temper products, the material is annealed under controlled conditions. Proper annealing is necessary to achieve the ductility required for deep drawing aluminum discs. Our process parameters are adjusted based on thickness, coil condition, and intended forming severity.

3. Circle Blanking

The annealed material is blanked into circular discs using equipment selected according to diameter, thickness, and order volume. We control blanking conditions to maintain circularity and minimize excessive edge burr. For large diameter aluminum discs, handling and stacking procedures are also adjusted to prevent surface damage and deformation.

4. Inspection and Sorting

Each production batch is inspected for key requirements such as alloy identification, temper condition, thickness, diameter, surface cleanliness, edge quality, and packing integrity. Where required, we can work with customer-specified inspection plans or provide documentation aligned with the purchase order.

Forming Performance and Surface Quality

A 1100 O aluminum circle is often selected when formability is more important than high mechanical strength. Its soft temper is suitable for customers producing deep-drawn or spun components. Common operations include pressing, drawing, embossing, bending, trimming, and edge rolling.

The mill finish surface should be clean and free from defects that would interfere with the customer's intended application. However, the acceptance standard should always reflect the final product and subsequent processing. For example, cookware producers may focus on drawing behavior and compatibility with non-stick coating preparation, while lighting manufacturers may prioritize surface uniformity before polishing, painting, or anodizing.

For demanding visual surfaces, customers should specify any requirements for scratches, roller marks, oil residue, surface waviness, or protective interleaving. For heavy forming applications, customers should provide the drawing depth, final shape, tooling design, and lubrication method when requesting material recommendations.

Typical Applications

Our 1100 O mill finish aluminum circles are used in a broad range of fabricated products. The final application determines the preferred thickness, diameter, surface condition, and tolerance level.

Cookware and Kitchenware

1100 O aluminum discs are widely used as blanks for frying pans, saucepans, stockpots, pressure cooker parts, baking tools, and kitchen accessories. The O temper supports deep drawing and spinning, while aluminum's thermal conductivity supports even heat transfer in suitable cookware designs.

Lighting and Electrical Components

The material is used for lampshades, reflector housings, lighting covers, electrical enclosures, and heat-transfer components. Depending on the final finish, the mill finish aluminum circle may be spun, polished, painted, or anodized after forming.

Traffic Signs and Industrial Panels

Larger diameter discs can be processed into round signs, identification plates, display panels, and industrial covers. Aluminum offers corrosion resistance and low weight, making it practical for many outdoor and indoor fabricated parts.

General Metal Forming

Other applications include fan components, decorative covers, vessel ends, equipment parts, caps, closures, and fabricated circular blanks. For applications requiring a different balance of strength and ductility, we can also supply 1100 Aluminum Circle products in sizes and conditions tailored to the forming process.

Selecting Diameter and Thickness

Selecting the correct aluminum circle diameter and thickness is important for reducing scrap and maintaining stable production. The blank diameter should be calculated from the final part geometry, drawing ratio, trimming allowance, and tool design. A circle that is too small may not provide adequate material for forming, while an oversized blank can increase trimming loss and cycle time.

Thickness should be selected based on the finished part's structural needs, forming depth, heat-transfer requirement, and surface finish process. Thin discs are often used for lighting, covers, and lightweight stamped parts. Medium and heavier gauges are commonly selected for cookware, industrial vessels, and parts requiring greater rigidity.

As the manufacturer, we recommend that buyers provide the following details when making an inquiry:

• Required alloy and temper.

• Diameter and thickness, including tolerance requirements.

• End-use application and forming method.

• Drawing depth or finished part drawing, if applicable.

• Surface acceptance criteria.

• Required quantity per size and shipment schedule.

• Packaging, labeling, and documentation requirements.

Packaging and Export Supply

We package aluminum circles to protect the material during internal handling, container loading, and international transportation. Depending on disc size and customer requirements, circles may be interleaved with protective paper, stacked horizontally or vertically, secured with suitable strapping, and placed on fumigated wooden pallets where required.

Packaging is designed to reduce the risk of moisture exposure, edge damage, surface abrasion, and shifting during transit. Each package can be marked with relevant product information such as alloy, temper, dimensions, batch identification, net weight, and purchase order reference.

Why Source Directly From Our Factory

Direct factory supply provides clearer control over the technical details that affect downstream performance. We coordinate alloy selection, O temper annealing, disc blanking, dimensional inspection, and packaging as an integrated manufacturing process. This helps us respond efficiently when buyers require customized diameters, thicknesses, tolerance levels, or packing configurations.

Our objective is not simply to supply an aluminum circle, but to manufacture a stable blank suited to the customer's forming operation. For 1100 O mill finish aluminum circles from 100mm to 1200mm, we work with industrial buyers to define the right specification before production and maintain consistency from material preparation through export packing.

Request a Technical Quotation

When requesting a quotation for 1100 O aluminum circles, please send your required diameter, thickness, quantity, application, and destination port. If the discs will be deep drawn or spun, include the finished part drawing or forming information. Our factory team will review the requirement and recommend an appropriate production specification for your aluminum disc order.