CNC Aluminum

Why Choose Aluminum Alloy

Lightweight and High Specific Strength

Aluminum has a low density (only one-third that of steel), making it the metal of choice for lightweight design as it significantly reduces component weight while still providing reliable structural strength.
Excellent Machinability

With low cutting resistance and good ductility, aluminum is suitable for precision machining such as 3-axis/5-axis CNC milling, drilling, and tapping, enabling the consistent production of complex geometries and tight tolerances.
Stable Corrosion Resistance

A dense oxide layer naturally forms on the surface, effectively resisting oxidation and most environmental corrosion, ensuring stable long-term performance in outdoor and humid environments.
Excellent Thermal and Electrical Conductivity

With thermal conductivity superior to most metals, it effectively dissipates heat; it also possesses good electrical conductivity, making it suitable for electronic structural components and heat-dissipating parts.
Compatibility with a Wide Range of Surface Treatments

It can undergo various post-processing treatments such as anodizing, hard anodizing, sandblasting, polishing, and coating, which not only enhance appearance but also further improve wear resistance and weather resistance.

Common Aluminum Alloy Grades

Aluminum 6061

Offers well-balanced overall properties, excellent machinability, and moderate cost, making it the most widely used aluminum alloy for CNC machining.

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Aluminum 7075

With strength, hardness, and fatigue resistance far exceeding those of 6061, it is the material of choice for high-load, high-performance components.

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Aluminum 5052

With good ductility and excellent corrosion resistance, it is particularly suitable for sheet metal parts, enclosures, panels, and other structures requiring bending and forming.

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Aluminum 2024

Featuring high fatigue strength and good tensile properties, it is commonly used for structural components and aerospace parts subjected to repeated stress.

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Aluminum 6082

A high-strength aluminum alloy commonly used in Europe, slightly stronger than 6061, with good machinability. Suitable for structural components requiring consistent strength.

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Aluminum 6063

Offers excellent surface treatment performance, commonly used for aesthetic components, extruded profiles, and parts requiring anodizing to achieve a high-quality finish.

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Aluminum 2011

With exceptional machinability, it is a common material for high-speed turning and automatic lathes. Suitable for small precision parts such as screws, connectors, and pins.

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Aluminum 5083

Offers excellent corrosion resistance, making it suitable for outdoor and marine environments, as well as sheet metal parts requiring high strength.

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Aluminum MIC6

Pre-stretched cast sheet with exceptional dimensional stability and flatness, making it the top choice for fixture platforms, precision equipment base plates, and high-stability sheet metal applications.

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Our Aluminum Processing Capabilities

We offer end-to-end aluminum alloy manufacturing capabilities covering everything from prototyping and small-batch production to mass production. Our facility is equipped with over 80 CNC machines capable of milling and turning with a precision of ±0.005 mm, and supports five-axis machining for handling complex geometries and multi-faceted features. For intricate structures or difficult-to-machine shapes, we also offer precision processes such as laser cutting, wire cutting, and EDM to ensure consistent production of even the most challenging components. All aluminum parts undergo inspection in accordance with mass-production-grade quality control systems (FAI / IPQC / OQC), ensuring that every batch maintains consistent and robust performance in terms of dimensions, assembly, and surface quality.
Limitations and Cost Characteristics of Aluminum Alloys

Although aluminum alloys offer excellent weight-saving benefits and machinability, their strength and wear resistance typically fall short of those of steel materials, requiring careful selection in high-load or high-impact environments. Additionally, anodizing imposes stringent requirements on material purity and surface finish, and color variations may occur between different batches. In terms of cost, while aluminum itself is moderately priced, the total processing cost may exceed that of steel components when complex structures or multiple surface treatments are required.

FAQ

How should I choose between 6061 and 7075?

6061 offers good overall performance, excellent machinability, and high cost-effectiveness, making it suitable for most structural components and prototype development;
7075 has significantly higher strength and hardness, making it more suitable for load-bearing applications, moving mechanisms, and high-load structures.
If a part requires both “lightweight design and high strength,” 7075 is generally recommended.
What level of precision can be achieved with aluminum?

In CNC machining, we can consistently control the tolerances of our aluminum parts within ±0.005 mm, making them suitable for precision assemblies, sliding mechanisms, positioning mechanisms, and other parts that require high tolerance consistency.
Is aluminum suitable for small-batch production?

It is highly suitable. Aluminum alloys offer high machining efficiency, stable processing, and low setup costs, making them ideal for small-batch manufacturing of 1–1,000 pieces. We support full-stage production from prototype validation and functional parts to small-batch pilot production, enabling rapid iteration and time-to-market while maintaining quality.
Which surface treatments work best with aluminum?

The most common and reliable options are:

• Anodizing — uniform color, corrosion-resistant

• Sandblasting + Anodizing — premium texture, suitable for aesthetic components

• Hard Anodizing — wear-resistant, suitable for sports equipment

Depending on the application, we can also provide other finishing solutions such as polishing, spray coating, and electroplating.
What if I’m not sure which aluminum alloy to choose?

You don’t need to decide on your own. Simply provide drawings or 3D files, and we will recommend the most suitable aluminum alloy grade (such as 6061, 7075, 5052, 2011, etc.) based on your application, structural strength requirements, weight requirements, load conditions, budget, and surface treatment needs.