When it comes to aluminum alloys, 6061 and 6063 are two of the most commonly used grades. Both are versatile, but they have distinct characteristics that make them suitable for different applications. Let’s dive into what sets them apart and how to choose the right one for your project.
What is Better Aluminum 6061or 6063?
When deciding between Aluminum 6061 and 6063, 6061 is generally better for structural applications due to its higher strength and durability. It’s ideal for high-stress environments and applications requiring robust mechanical properties. On the other hand, 6063 is better suited for architectural applications where aesthetic finish and extrudability are more important. It offers a smoother surface ideal for painting and anodizing, but it has lower strength compared to 6061.
Aluminum 6061 vs 6063 Comparison
When comparing Aluminum 6061 and 6063, it’s important to understand their unique properties and best uses. Here’s a detailed look at how they differ:
Which is Stronger, 6061 or 6063 Aluminum?
6061 Aluminum is stronger than 6063 Aluminum.
6061 has a tensile strength of about 270 MPa (39,000 psi) and a yield strength of around 240 MPa (35,000 psi) when heat-treated to the T6 condition. In contrast, 6063 has a tensile strength of approximately 210 MPa (30,000 psi) and a yield strength of around 140 MPa (20,000 psi).
Which is More Corrosion-Resistant, Aluminum 6061 or 6063?
Aluminum 6063 is generally more corrosion-resistant than 6061. For applications where superior corrosion resistance is required, 6063 is the preferred choice. While 6061 also has good corrosion resistance, especially in natural conditions, it is less resistant compared to 6063.
Is Aluminum 6061 or 6063 More Expensive?
Aluminum 6061 is generally more expensive than 6063. The higher cost is due to its superior strength, versatility, and the additional processing required to achieve its properties.
| Aluminum Alloy | Price Range (per kg) |
|---|---|
| 6061 | $3.00 – $4.50 |
| 6063 | $2.50 – $4.00 |
Is 6061 Better Than 6063 Anodizing?
6063 Aluminum is generally better for anodizing than 6061. 6063 has a finer surface finish, which results in a more consistent and aesthetically pleasing anodized coating.
Aluminum 6061 vs 6063: Composition
| Element | 6061 Aluminum | 6063 Aluminum |
|---|---|---|
| Magnesium | 0.8-1.2% | 0.45-0.9% |
| Silicon | 0.4-0.8% | 0.2-0.6% |
| Copper | Up to 0.4% | Up to 0.1% |
| Chromium | 0.04-0.35% | 0.1% |
| Iron | Up to 0.7% | Up to 0.35% |
| Zinc | Up to 0.25% | Up to 0.1% |
| Others | Small amounts of manganese, titanium, and others | Small amounts of manganese, titanium, and others |
Aluminum 6061 vs 6063: Mechanical Properties
| Property | 6061 Aluminum | 6063 Aluminum |
|---|---|---|
| Tensile Strength | 270 MPa (39,000 psi) (T6 condition) | 210 MPa (30,000 psi) (T6 condition) |
| Yield Strength | 240 MPa (35,000 psi) (T6 condition) | 140 MPa (20,000 psi) (T6 condition) |
| Elongation | 12-17% (T6 condition) | 8-10% (T6 condition) |
| Hardness | 95 HB (Brinell) | 60 HB (Brinell) |
| Shear Strength | 200 MPa (29,000 psi) | 140 MPa (20,000 psi) |
Aluminum 6061 vs 6063: Physical Property
| Property | 6061 Aluminum | 6063 Aluminum |
|---|---|---|
| Density | 2.70 g/cm³ (0.097 lb/in³) | 2.70 g/cm³ (0.097 lb/in³) |
| Melting Point | 582-652°C (1080-1205°F) | 606-644°C (1123-1191°F) |
| Thermal Conductivity | 151 W/m·K (88 BTU/hr·ft²·°F) | 201 W/m·K (116 BTU/hr·ft²·°F) |
| Electrical Conductivity | 40% IACS (International Annealed Copper Standard) | 43% IACS |
| Modulus of Elasticity | 69 GPa (10,000 ksi) | 69 GPa (10,000 ksi) |
What is 6061 Aluminium Alloy Used For?
Common uses include:
- Aircraft frames
- Engine components
- Boat hulls
- Bicycle frames
- Structural beams
- Suspension parts
- Marine fittings
- Industrial machinery components
What is 6063 Aluminium Alloy Used For?
Common uses include:
- Window frames
- Door frames
- Curtain walls
- Tubing
- Irrigation pipes
- Architectural trim
- Heat sinks
For more detailed comparison information between aluminum 6061 and 6063, please watch the following YouTube video.
Does 6063 Aluminum Rust?
6063 aluminum does not rust because rusting is a form of corrosion specific to iron and steel. It generally offers good resistance to corrosion, especially when properly anodized or coated.
What is 6061 Aluminum Equivalent To?
6061 aluminum has equivalents in several other international standards and alloys, including:
- European Union: Equivalent to EN AW-6061, often referred to as 3.3214.
- Japan: Equivalent to JIS A6061.
- China: Equivalent to GB/T 3190 6061.
- Europe: Equivalent to 6082-T6 and 6005A-T6.
How Much Weight Can 6061 Aluminum Hold?
6061 aluminum can hold a significant amount of weight, the ultimate tensile strength is about 270 MPa (39,000 psi), and the yield strength is around 240 MPa (35,000 psi)
Is 6063 Aluminum Weldable?
Yes, 6063 aluminum is weldable. It can be successfully welded using techniques such as TIG and MIG welding aluminum. It’s often used in applications where welding is required, such as in architectural and structural components.
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FAQ
The main difference between 6061 and 6063 aluminum alloys is that 6061 is stronger and suitable for structural applications, while 6063 is more suitable for building applications that require beautiful surfaces.
6061 aluminum is popular due to its excellent balance of strength, machinability, and versatility.
6061 aluminum bends well, but its ability to bend depends on its temper. In the annealed (O) or T4 conditions, it bends more easily.
6061 aluminum is not considered weak; in fact, it is known for its high strength and versatility. It offers a strong strength-to-weight ratio and is widely used in demanding applications, including aerospace and structural components.
Catalog: Materials Guide
This article was written by engineers from the BOYI team. Fuquan Chen is a professional engineer and technical expert with 20 years of experience in rapid prototyping, mold manufacturing, and plastic injection molding.
