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6063 Aluminum Plate
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6063 aluminum plate is a typical Al-Mg-Si (aluminum–magnesium–silicon) alloy in the 6000 series. It is widely known as a high-extrusion and architectural-grade aluminum, with excellent surface finish, good corrosion resistance, and moderate strength.
Compared with 6061, 6063 is more focused on appearance and forming performance, while 6061 is more focused on structural strength and engineering use.
Chemical Composition of 6063 Aluminum Plate
| Element | Content (%) | Function |
|---|---|---|
| Aluminum (Al) | Balance | Base material |
| Magnesium (Mg) | 0.45 – 0.9% | Strength improvement |
| Silicon (Si) | 0.2 – 0.6% | Forms Mg₂Si strengthening phase |
| Iron (Fe) | ≤0.35% | Impurity control |
| Copper (Cu) | ≤0.1% | Controlled for corrosion resistance |
| Chromium (Cr) | ≤0.1% | Improves stability |
Key Performance Characteristics of 6063 Aluminum Plate
1. Excellent Surface Finish Quality
- Very smooth surface after extrusion or rolling
- Ideal for anodizing and coating
- Widely used in decorative applications
2. Good Corrosion Resistance
- Stable oxide film protection
- Suitable for outdoor architectural environments
- Performs well in atmospheric conditions
3. Good Formability
- Easy to extrude into complex profiles
- Suitable for bending and shaping
- Lower strength allows easier processing
4. Medium Strength
- Lower strength compared to 6061
- Suitable for non-heavy structural applications
- Focus on appearance and fabrication ease
6063 vs 6061 Aluminum Plate – Key Differences
Both belong to the 6000 series, but their design purposes are different.
Strength and Performance Comparison
| Property | 6063 | 6061 |
|---|---|---|
| Strength | Medium | High |
| Surface finish | Excellent | Good |
| Machinability | Good | Very good |
| Weldability | Excellent | Good |
| Structural use | Light duty | Heavy duty |
Application Focus Difference
- 6063 = Architectural & decorative use
- 6061 = Structural & mechanical engineering use
Why 6063 Has Better Surface Quality
6063 has:
- Lower alloying element content
- More uniform grain structure
- Better extrusion behavior
This results in:
- Smoother surface
- Easier anodizing
- Better appearance after finishing
Why 6061 is Stronger Than 6063
6061 contains:
- Higher magnesium and silicon content
- Better precipitation strengthening effect after T6 treatment
- Higher load-bearing capability
Typical Applications
6063 Aluminum Plate Applications
- Window and door frames
- Curtain wall systems
- Architectural profiles
- Decorative panels
- Lightweight structural parts
6061 Aluminum Plate Applications
- Machine components
- Structural frames
- Transportation parts
- Industrial engineering structures
- Aerospace components
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