Aluminum Circle Plate

Aluminum Circle Plate is a round, flat plate made of aluminum alloy or high-purity aluminum. Due to its excellent corrosion resistance, lightweight properties, thermal/electrical conductivity, and formability, aluminum circles are widely used in manufacturing industries.

Aluminum Circle Plate is essentially a semi-finished raw material, used as the “starting blank” for producing round metal products through processes such as spinning or deep drawing.

Aluminum Circle Plate Specifications

Aluminum circles are usually cut from aluminum coils or aluminum sheets. Depending on different applications, they are available in various sizes and temper grades.

Aluminum Circle Plate Alloys and Their Advantages

Selecting the appropriate aluminum alloy “grade” is critical to the manufacturing process:

• 1050 / 1060 / 1100 / 1070: These are “pure” aluminum alloys. They are very soft with excellent ductility, making them ideal for complex spinning or deep drawing processes and less prone to cracking.
• 3003: The addition of manganese gives this alloy higher strength than the 1000 series aluminum alloys. It is the “workhorse” of the cookware industry because it combines strength with good formability.
• 5052: Contains magnesium, offering high strength and excellent marine-grade corrosion resistance. It is commonly used for structural components or road signs.

O temper: Most suitable for deep drawing (cookware, lighting fixtures, automotive parts).

H12/H14/H32/H34: Semi-hard tempers, suitable for moderate forming with higher strength requirements.

Surface treatments help prevent scratching, oxidation, or provide a decorative appearance.

Aluminum Circle Plate Applications

Aluminum circle plates are widely used across multiple industries:

• Cookware and kitchenware: Pots, frying pans, lids, baking trays. High-formability alloys such as 1070 in O temper are ideal choices.
• Lighting: Due to aluminum’s high reflectivity, it is commonly used to manufacture reflectors, lamp shades, and LED housings.
• Signage: Round traffic signs, nameplates, and street signs (typically 1000 or 3000 series).
• Electronics and electrical: Heat sinks, enclosures, capacitors. High-thermal-conductivity alloys such as the 1100 series are preferred.
• Packaging industry: Food containers, aerosol cans, beverage cans (aluminum can ends).
• Industrial and machinery: Circular plates used for tanks, drums, chimneys, and chemical processing equipment.
• Decoration and construction: Ceiling panels, architectural components (anodized or brushed surface finishes).
• Automotive: Wheel rims, fuel tank components, and heat shields.

Cookware Aluminum Circle Plate

In the cookware industry, aluminum is highly favored for its fast and even heat conduction. These circles are typically processed into pots, frying pans, and pressure cookers through deep drawing or spinning.

• Common alloys: 1050, 1100 (pure aluminum) or 3003 (manganese alloy with higher strength).
• Key features: Food grade, non-toxic, safe for cooking.
• High ductility: Ideal for deep drawing (stretching metal into deep pot shapes) without cracking.
• Surface quality: Smooth surface suitable for applying non-stick coatings, ceramic coatings, or enamel.
• Processing and treatment: Surfaces are anodized to form a dense oxide layer, enhancing corrosion and wear resistance; some are additionally coated with non-stick layers (such as PTFE/Teflon) to meet non-stick cooking requirements; flatness must be ensured to avoid uneven heating.

Lighting Aluminum Circle Plate

Aluminum circles are standard materials for manufacturing lamp reflectors and shades. They can be polished to a mirror finish, making them ideal for controlling light direction.

• Common alloys: 1050, 1060, 1070.
• High reflectivity: Can be anodized to enhance light output and prevent oxidation.
• Heat dissipation: Efficiently dissipates heat from bulbs or LED chips.
• Spinnability: Easy to process into conical or hemispherical reflectors.
• Processing and treatment: Reflective aluminum discs require mirror polishing; outdoor lighting discs require anodized coloring or powder coating to resist sunlight and rain exposure.

Aluminum Circle Plate for Road Sign

Traffic signs and road signs require durability and the ability to remain rust-free in harsh outdoor environments.

• Common alloys: 3003, 5052 (higher magnesium content provides superior corrosion resistance).
• Weather resistance: Highly resistant to moisture and salt spray.
• Surface treatment: Usually chemically cleaned or treated to ensure perfect adhesion of reflective vinyl films or coatings.
• Strength: 5052 alloy provides sufficient rigidity to remain flat even under strong wind conditions.
• Processing and treatment: Chemical oxidation plus film lamination is applied—first forming an oxide layer to enhance adhesion, then applying high-reflectivity film to ensure nighttime visibility; edges must be rolled and reinforced to prevent injury and deformation.

Spinning Aluminum Circle Plate

“Spinning” refers to a metal forming process in which a disc is rotated at high speed on a lathe and shaped over a mandrel using roller tools.

• Common alloys: 1050, 1100, 3003 (usually in “O” temper, the softest/annealed condition).
• Crack-free: The metal must be soft enough to “flow” over the mold during rotation.
• Fine grain structure: Critical for achieving a smooth surface after spinning and preventing “peeling” or rough textures.
• Applications: Industrial transmission turntables, laboratory equipment platforms, small mechanical rotating parts, trophies, gas cylinders, etc.
• Processing and treatment: Precision turning and milling are required to ensure roundness and flatness; components with high rotational accuracy requirements must undergo dynamic balancing inspection and correction; surfaces can be anodized for corrosion resistance or blackened to improve wear resistance.

Aluminum Circle Plate Advantages

• Lightweight yet strong
• Excellent corrosion resistance (especially 5052, 1060, and 1100 alloys)
• High thermal and electrical conductivity
• Easy to form and suitable for deep drawing
• Customizable diameter, thickness, temper, and surface treatment
• Environmentally friendly and recyclable

Aluminum Circle Plate Manufacturing Process

• Melting and casting: Aluminum is melted and cast into large aluminum ingots.
• Rolling: The aluminum ingots are rolled into thin coils (hot rolling or cold rolling).
• Circle blanking: High-speed punching machines (similar to giant cookie cutters) punch the coils into circular blanks.
• Annealing: The circles are usually heat treated (annealed) to achieve the “O” temper, softening the material for subsequent forming.

How to Choose an Aluminum Circle Plate

Choosing the right aluminum circle plate (also known as aluminum discs or blanks) mainly depends on your manufacturing process—such as spinning, deep drawing, or stamping—and the final application of the product.

Select the Right Aluminum Alloy

The alloy determines the strength, corrosion resistance, and thermal conductivity of the circle.

Choose the Proper Manufacturing Process (CC vs. DC)

CC Aluminum Circle Plate: Best for spinning. It is generally more cost-effective but may have slightly less consistent grain structure for complex deep-drawing.

DC Aluminum Circle Plate: Best for deep-drawing and stamping. It has a more uniform grain size, which prevents "orange peel" textures or cracking when the metal is stretched deeply into shapes like high-walled pots.

Determine Dimensions and Temper

Thickness: Usually ranges from 0.3 mm to 10 mm. Cookware typically requires a thickness of 1.0 mm to 5.0 mm to ensure durability and good thermal conductivity.

Diameter: Standard size range is 100 mm to 1200 mm. Choose a diameter slightly larger than the “developed” surface area of the final product to allow for trimming.

Temper (hardness): O (annealed): The softest condition, ideal for deep drawing and complex spinning.

H12/H14: Partially hardened; suitable for flat signage or shallow forming that requires higher rigidity.

Haomei Aluminum: Your Trusted Partner for Aluminum Circle Plates

Surface Quality

The aluminum circles we produce feature smooth surfaces free from scratches, oil stains, oxidation spots, or burrs, ensuring smooth processing and subsequent treatments.

Grain Size

High-quality circles adopt a fine-grain structure, preventing “orange peel” texture after forming caused by coarse grains, and ensuring excellent deep processing performance.

Dimensional Tolerance

Each batch of aluminum circles is strictly controlled for thickness and diameter consistency, inspected with precision micrometers to ensure dimensional accuracy meets customer requirements.

Anodizing Suitability

If you plan to color or harden the surface, the aluminum circles we supply (such as 3003 or high-purity 1xxx series) are anodizing-grade materials that effectively avoid streaks and defects, enhancing subsequent surface treatment results.

Frequently Asked Questions about Aluminum Circle Plate

What materials of aluminum circles do you offer?

How to choose the appropriate thickness and temper for Aluminum Circle Plate?

It is recommended to select based on application + processing method:

• Deep-drawn parts (such as cookware, containers): Choose 1060 / 3003 in O temper for best ductility
• Structural / load-bearing parts: Choose 3003 H18 / 5052 H32 for higher strength
• Heat dissipation / conductive parts: Choose 1060 H14 to balance conductivity and strength

Haomei Aluminum provides free material selection consultation and can recommend the optimal solution based on your specific products and processes.

How do you ensure the quality of aluminum circles? Do you provide quality inspection reports?

Haomei Aluminum has established a full-process quality control system with 7 inspection checkpoints from raw materials to finished products:

• Raw material inspection: Chemical composition and mechanical property testing for each batch of aluminum coils
• Process control: Laser thickness measurement, online flatness monitoring, and real-time parameter adjustment
• Finished product inspection: Full inspection of dimensional accuracy, surface quality, edge burrs, and forming performance
• Quality commitment: Factory inspection reports provided; support for third-party authoritative testing (such as SGS); all products comply with RoHS / REACH environmental standards.

What surface treatments and packaging options do you offer?

Surface treatments: Film coating, polishing, anodizing, spraying, passivation, etc., to meet different requirements

Packaging options:

• Standard export packaging: Moisture-proof paper + bubble wrap + rigid cardboard + wooden pallets, suitable for sea / air shipment
• Customized packaging: Designed according to customer requirements, such as individual carton packaging, special markings, etc.
• Protective measures: Foam separators placed between circles to prevent collision and scratching during transportation

Stock of Aluminum Circle Plate