Aluminum Circle Disc for Traffic Sign and Road Sign

Aluminium circles for road sign are an indispensable fundamental material in transportation infrastructure construction, mainly used for manufacturing various traffic signs such as speed limit signs, prohibition signs, directional signs, etc. As a professional manufacturer of aluminum circles for road signs, we are committed to providing high-quality products that meet international standards to meet the global demand for road construction and traffic safety facilities.

Our aluminum circles for road signs adopt advanced production processes and high-quality alloy materials, featuring excellent weather resistance, corrosion resistance, and mechanical properties, capable of long-term use in various harsh environments. The products undergo strict quality control to ensure that every aluminum circle meets international standards and customer requirements, providing reliable protection for road traffic safety.

Our products are made of high-quality materials and advanced processes, featuring lightweight and high strength, good corrosion resistance, and excellent processing performance to meet various road sign application needs.

Haomei Aluminum's aluminum circle products are widely used in the manufacturing of various traffic signs and road signs. The commonly used aluminum alloy for Aluminum Circle Disc for Traffic Sign and Road Sign is 1100 H14. The surface of the product undergoes chemical degreasing and polishing treatment to ensure a high-quality natural luster.

What Type of Aluminum is Used for Road Signs?

Generally, 1100 aluminum alloy is used. Although 1100 aluminum circles have relatively low strength, their excellent corrosion resistance makes them suitable for road signs in general environments.

1100 aluminum alloy is an ideal choice for making road signs in general environments, providing sufficient durability and cost-effectiveness.

Specification of aluminum circle for traffic sign

• Alloy: 1100
• Temper: H14
• Diameter: 50mm to 1600mm
• Thicknesses: 0.5mm to 6.0mm
• Ready-stamped blanks such as discs, triangles, squares, rectangles etc.
• Sheets in a maximum size of 2, 000mm x 6, 000mm.

Our aluminum circles for road signs are available in the following high-quality aluminum alloy materials:

• 1060 Pure Aluminum: With aluminum content above 99.6%, it features excellent corrosion resistance, electrical and thermal conductivity. Suitable for general road sign applications where high strength is not required.
• 3003 Aluminum Alloy: Belonging to the aluminum-manganese series, it has moderate strength and good corrosion resistance and processing performance, making it an ideal material choice for aluminum circles for road signs.
• 5052 Aluminum Alloy: Belonging to the aluminum-magnesium series, it has high strength and excellent corrosion resistance, especially outstanding in marine environments. Suitable for road signs requiring higher material performance.

Haomei Aluminum Circles for Road Sign

Common Specifications for Aluminum Circles

Our aluminum circles for road signs are available in a variety of standard specifications to meet the needs of different types and sizes of traffic signs:

Diameter Specifications

• 24 inches (approximately 600mm)
• 31.5 inches (approximately 800mm)
• 39.4 inches (approximately 1000mm)
• Other custom sizes available upon request

Thickness Specifications

• 0.04 inches (approximately 1.0mm)
• 0.06 inches (approximately 1.5mm)
• 0.08 inches (approximately 2.0mm)
• 0.12 inches (approximately 3.0mm)
• Other custom thicknesses available upon request

Road Sign Shape Design

Our aluminum circles for road signs are mainly available in the following standard shapes:

• Circle: The most commonly used shape, suitable for speed limit signs, prohibition signs, etc.
• Triangle: Side lengths usually 27.6 inches (700mm), 35.4 inches (900mm), or 43.3 inches (1100mm), suitable for warning signs.
• Octagon: Opposite sides typically 23.6 inches (600mm) or 31.5 inches (800mm), suitable for stop/yield and other special signs.
• Square/Rectangle: Customizable in various sizes according to customer requirements, suitable for street name signs, directional signs, etc.

Surface Treatment for Aluminum Circles for Road Sign

To enhance the service life and visual performance of road signs, we offer a variety of surface treatment options:

• Anodizing: Creates an oxide film on the surface of the aluminum circle through an electrochemical process to improve corrosion and wear resistance.
• Reflective Film Lamination: Applies various types of reflective films on the surface of the aluminum circle, including engineering grade, high intensity grade, and micro-prismatic reflective films.
• Chemical Etching: Enhances the surface adhesion and durability of the reflective film by chemically treating the surface of the aluminum circle.
• Coating: Available in various colors according to customer requirements, such as powder coating, liquid coating, etc.

Advantages of Aluminum Circles for Road Sign

Lightweight and High Strength

With an excellent strength-to-weight ratio and a density of approximately 2.7g/cm³, much lower than traditional materials like steel, greatly reducing the sign's weight for easier transportation and installation.

Strong Corrosion Resistance

The naturally formed oxide film on the surface of the aluminum circle provides excellent corrosion protection. After anodizing, the oxide film can reach 10-20μm in thickness, significantly enhancing corrosion resistance.

Excellent Processing Performance

Featuring good plasticity and workability, it is easy to cut, stamp, bend, and weld, meeting various sign shapes and structural requirements.

Excellent Surface Performance

The specially treated surface of the aluminum circle has excellent flatness and smoothness, providing an ideal base for reflective film lamination or printing.

High Recyclability

Aluminum is a highly recyclable material, and recycling consumes only about 5% of the energy required to produce primary aluminum. Our aluminum circles for road signs are made from 100% recyclable materials.

1100 Aluminum Circle Disc for Traffic Sign and Road Sign Chemical Compositions

1100 Aluminum Circle Disc for Traffic Sign and Road Sign Mechanical Properties

What is circle shape traffic signs?

Circular traffic signs are typically used to convey regulatory or restrictive information. Although traffic sign systems may vary from country to country, common uses for circular traffic signs include:

• Prohibition Signs: Red circular borders indicate prohibited actions, such as no parking or no left turn.
• Mandatory Signs: Blue circular borders indicate mandatory instructions, such as must turn right or must adhere to a speed limit.

The design and color choices of these signs are intended to attract the driver’s attention and ensure compliance with road rules for safety.

Why use aluminum signs?

• Strong Weather Resistance: Aluminum has excellent corrosion resistance, maintaining the clarity and readability of signs under various weather conditions, including rain, snow, and sunlight.
• Lightweight: Aluminum is lightweight, making it easy to transport and install while reducing the load on support structures.
• Durability: Aluminum signs are resistant to wear and tear, less prone to scratches or damage, making them suitable for long-term use.
• Easy to Work With: Aluminum is easy to process and shape, allowing it to be made into various shapes and sizes to meet different traffic sign requirements.
• Aesthetic Appeal: Aluminum can undergo various surface treatments, such as painting and anodizing, enhancing the visual appeal and reflective capability of the signs.

Typical Thickness of Aluminum Circle Disc for Traffic Sign and Road Sign

Different thicknesses ensure durability and adaptability of the signs in various application environments.

• 0.063" Aluminum Circle Disc for Traffic Sign and Road Sign: Suitable for signs that require lightweight and easy processing, ideal for standard indoor or outdoor applications.
• 0.080" Aluminum Circle Disc for Traffic Sign and Road Sign: Offers better strength and durability, suitable for more demanding environments and situations, including signs in high-traffic areas.
• 0.125" Aluminum Circle Disc for Traffic Sign and Road Sign: Provides excellent strength and impact resistance, perfect for extreme conditions, such as traffic signs and signs in heavy industrial environments.

These aluminum signs can be customized according to specific needs to meet different application scenarios and requirements.

Applications of Aluminum Circle Disc for Traffic Sign and Road Sign

Aluminum Circles as Traffic Signs

• Highway Signs

  Such as speed limit signs, prohibition signs, directional signs, service area signs, etc.

• Urban Road Signs

  Such as intersection directional signs, lane indication signs, parking signs, etc.

• Brushed aluminium strip

  Such as curve warning signs, intersection signs, livestock crossing signs, etc.

• Airport Road Signs

  Such as entrance signs, exit signs, parking space signs, speed limit signs, etc.

• Parking Lot Signs

  Such as entrance signs, exit signs, parking space signs, speed limit signs, etc.

• Scenic Area Road Signs

  Such as scenic spot directional signs, scenic introduction signs, safety warning signs, etc.

What other road sign applications?

Our aluminum circle products are currently used for the production of: regulatory traffic signs, warning traffic signs, guide signs, street name signs, route marker signs, expressway signs, highway signs, welcome signs, information signs, recreational and cultural interest signs, emergency management (civil defense) signs, temporary traffic control (construction or work zone) signs, school signs, railroad and light rail signs, bicycle signs.

Production Process and Quality Control of Aluminum Circles for Road Signs

Raw Material Preparation

High-quality aluminum ingots and alloy elements are selected and mixed according to strict formulations.

Melting and Casting

The prepared raw materials are added to the melting furnace and heated to 700-750℃. After refining, degassing, and filtering, they are cast into ingots.

Hot Rolling

The ingots are heated to 400-500℃ and then hot rolled to gradually reduce thickness and improve material structure and mechanical properties.

Cold Rolling

The hot-rolled aluminum plates are further cold rolled to control final thickness and surface quality.

Heat Treatment

Annealing, solution treatment, or aging treatment is carried out as needed to adjust the hardness and strength of the material.

Cutting and Blanking

The aluminum sheets are cut into required sizes, usually square first, then further processed into circles or other shapes by precision blanking or spinning.

Surface Treatment

Anodizing, chemical etching, reflective film lamination, etc., are performed according to customer requirements.

Quality Inspection

Each batch of products undergoes strict quality inspection, including dimensional accuracy, surface quality, mechanical performance, etc.

Packing and Warehousing

Products that pass inspection are packaged according to standards and stored for shipment.

Strict Quality Control for Aluminum Circles for Road Signs

We have established a complete quality control system to ensure every aluminum circle meets high-quality standards:

• Raw Material Inspection: Strict inspection of each batch of raw materials, including chemical composition analysis and mechanical property testing.
• Process Control: Multiple quality control points are set in the production process to monitor and record key process parameters in real time.
• Finished Product Inspection: Comprehensive inspection of each batch of finished products, including dimensional accuracy, surface quality, mechanical performance, etc.
• Quality Traceability: A complete product quality traceability system is established to ensure each product can be traced back to the raw material batch and production process.
• Continuous Improvement: Through data analysis and customer feedback, we continuously optimize production processes and quality control systems to improve product quality.

Custom Services for Aluminum Circles for Road Signs

To better meet customers' personalized needs, we provide comprehensive customization services:

Material Customization

Different alloy materials and heat treatment conditions are available according to customer requirements, such as 1060, 1100, 3003, 5052 alloys, and conditions like O, H14, H24, etc.

Size Customization

Various diameters and thicknesses of aluminum circles can be customized according to the dimensions provided by customers, with a wide range of options.

Shape Customization

In addition to standard shapes, various special shapes of aluminum circles can also be customized based on customer drawings or samples.

Surface Treatment Customization

Various surface treatments such as anodizing, chemical etching, reflective film lamination, etc., are available upon request.

Packing Customization

Special packaging methods are available according to customer requirements to ensure products are not damaged during transportation.

Is a stop sign made of aluminum?

Yes, many stop signs are made of aluminum. Aluminum is a popular choice for traffic signs, including stop signs, because it is durable and weather-resistant. Aluminum signs are lightweight, rustproof, and corrosion-resistant, and they can easily be coated with reflective materials to ensure high visibility both day and night. Additionally, the reflective coating used on aluminum signs enhances their visibility and effectiveness in guiding and regulating traffic.