Sandblasting (unified texture)
Used to achieve a more uniform matte appearance and weaken knife marks; cosmetic parts can improve consistency through sandblasting grain size and appearance surface definition.
6061 Aluminum Alloy
Aluminum alloy 6061 (Al-Mg-Si series) is one of the most commonly used general-purpose aluminum alloys in CNC machining.
Quote checklist: Upload your 3D model and, when available, a 2D drawing. Identify the required process, material, quantity, critical dimensions, finish, appearance standard, and target delivery date.
Key Material and Manufacturing Parameters
Engineering note: Values below are typical reference ranges. Final manufacturability, tolerances, material condition, surface finish, cost, and lead time depend on the drawing, geometry, quantity, and selected process.
Upload CAD files and mark critical features for an engineering review before production.
| Process | CNC machining (aluminum alloy 6061) |
|---|---|
| Material properties | Lightweight, easy to process, highly versatile; balanced in strength/machinability/cost, suitable for structural parts and cosmetic parts |
| Machining tolerance | ±0.2 mm (typical reference value; it is recommended to mark key dimensions on 2D drawings and indicate the datum) |
| Minimum wall thickness | ≥1.0 mm (recommended); Thin-walled/large planes need to evaluate the rigidity and clamping method, and reinforce or separate parts if necessary |
| Service temperature | 200℃ (material temperature resistance; actual working conditions need to be comprehensively evaluated based on structure, stress and surface treatment) |
| Tensile strength | 320–460 MPa (typical reference value; condition/heat treatment will affect it, please note if you need to specify the condition) |
| Density | 2.65 g/cm³ |
| Hole and Assembly Recommendations | It is recommended to provide 2D markings for assembly holes/positioning holes; when matching accuracy is required, you can note "Reaming/Enlarging/Finishing Priority" |
| Threads and Fastening | Threads can be processed; if higher assembly durability or anti-corrosion is required, nickel plating/passivation/chromium plating and other solutions can be noted |
| Recommended surface orientation | It is recommended that the appearance surface avoid the clamping indentation and tool path intersection; the appearance surface can be defined in the model and stated in the remarks. |
| Typical lead time | Relevant to size, quantity, processing difficulty and finishing; clear delivery and expedited options will be given after uploading the file |
| Finishing | Sand blasting, anodizing, powder coating, painting, screen printing, laser engraving, polishing, brushing, nickel plating, passivation, chrome plating |
Finishing
Anodizing (appearance + protection)
It is often used to improve corrosion resistance and appearance texture. Natural color/dyeing is optional. For high color consistency requirements, it is recommended to provide color plates or samples for reference.
Powder coating (wear-resistant coating)
Suitable for surface protection that requires more wear resistance and stronger coverage; it will change the details, corners and assembly fit, and key mating surfaces need to be defined in advance.
Spray painting (customized color and texture)
Suitable for specified color numbers and textures such as matte/high-gloss; it is recommended to note the color number, appearance and allowable defect standards.
Screen printing (logo and scale)
Used for logos, scales and other graphic information; it is recommended to provide vector files and location and size instructions.
Laser engraving (durable marking)
Ideal for serial numbers, QR codes and durable markings; confirm contrast and readability targets when combined with anodizing/spray coating.
Polishing (local highlights)
Used to obtain higher gloss or partial mirror effect; for surfaces sensitive to knife lines/orange peel, it is recommended to communicate the target effect in advance.
Brushed (texture direction)
Used to obtain metal texture and directional appearance; it is recommended to define the drawing direction and appearance surface range to avoid damaging the texture on the clamping surface.
Nickel plating (corrosion resistance and decoration)
Used to improve corrosion resistance and appearance texture; parts sensitive to fit dimensions need to be marked in advance or indicate whether coating coverage is allowed.
Passivation (corrosion resistance improvement)
Suitable for parts that require corrosion resistance and surface stability; it is recommended to explain the medium and operating conditions before use in specific environments.
Chrome plating (wear resistance and appearance)
Used to improve wear resistance and decorative effects; it will affect size and fit. Key mating surfaces need to confirm the coating range and specified thickness in advance.
Why choose aluminum alloy 6061 (CNC machining)
Strong versatility and more stable balance
It has a balanced performance between strength, machinability and cost, and is suitable for various types of structural and cosmetic parts from prototypes to low- to medium-volume production.
Lightweight has obvious advantages
It has low density and is suitable for weight-saving structural design; it is very cost-effective when used for parts such as brackets, shells and fixtures.
Processing friendly, lead time controllable
Suitable for rapid processing and iteration; "precision priority" can be used for critical dimensions through process arrangement and finishing strategies.
Rich finishing options
Sandblasting/anodizing/spray coating/screen printing/laser engraving/polishing/drawing, as well as nickel plating/passivation/chrome plating, covering the multiple goals of "appearance + protection + logo".
Recommended Applications
- Shell and structural parts: Shell, bracket, clamp, general structural parts
- Lightweight requirements: Need to reduce weight but still want to maintain the strength of the metal structure
- Appearance + Protection: Requires anodizing/sandblasting/spray coating/drawing and other appearance and protection combinations
- Small and medium batch delivery: Projects with duplicate parts and high batch consistency requirements
Consider Another Material or Process
- Extremely high strength: Prioritize evaluation of 7075 or alloy steel systems
- More emphasis on forming/corrosion-resistant sheet properties: Can evaluate more suitable aluminum alloys such as 5052
- High temperature resistance/high wear conditions: Recommended to evaluate steel/stainless steel or surface engineering options
- Extremely strict on both size and appearance: Need more clear 2D annotation + process strategy + appearance standard definition
Design and DFM Guidelines
- Key dimensions and benchmarks: It is recommended to provide 2D drawings (PDF/DWG/DXF) and mark key dimensions, tolerances and datum planes; if there is no 2D drawing, please clearly indicate "key holes/critical surfaces" in the remarks.
- Thin walls and large flat surfaces: Thin walls/large flat surfaces are easily affected by clamping and residual stress; it is recommended to reinforce and make transition fillets, and if necessary, separate parts for assembly.
- Deep cavity and tool accessibility: Deep cavities/narrow grooves will significantly affect processing costs and surface quality; try to increase the internal corner fillet, reserve tool space, and reduce inaccessible features.
- Hole location and thread: It is recommended that the assembly holes have a unified reference and matching diameter; please indicate the specifications and assembly method for the threads. If you want to prevent corrosion or improve the appearance, you can consider finishing such as nickel plating/passivation/chromium plating.
- Appearance surface definition: When sandblasting/anodizing/spray coating/drawing and other appearances are required, please define the appearance surface and allowable defect standards to avoid the clamping surface and tool path handover from affecting the appearance.