Selecting the right aluminum alloy can be challenging given the numerous options available. Among them, 6063-T5 aluminum alloy stands out with its unique advantages, offering excellent surface treatment properties, corrosion resistance, and superior workability. Widely used in construction and structural applications, this article provides an in-depth analysis of 6063-T5 aluminum alloy's characteristics, applications, and a detailed comparison with 6061-T5 to help guide your material selection.
6063-T5 is a medium-strength heat-treatable alloy renowned for its exceptional surface finish, corrosion resistance, and excellent workability. Primarily used in architectural and structural applications, this alloy contains 0.7% magnesium and 0.4% silicon, offering good mechanical properties suitable for various extruded profiles.
The alloy demonstrates excellent extrusion capabilities, enabling production of thin-walled and complex hollow shapes. Standard profiles include flat angles, channels, and hollow circular and square sections. 6063 responds well to polishing, chemical brightening, anodizing, and coloring processes.
The T5 temper designation describes the heat treatment process applied after forming:
6063 aluminum exhibits exceptional corrosion resistance due to its excellent anodizing capabilities. The anodizing process creates a thicker chemically-bonded oxidized layer that protects against further corrosion while providing an attractive, uniform appearance that can incorporate color pigments without peeling.
Considered a "softer" alloy, 6063-T5 offers excellent machinability and extrudability - making it the most common choice for extrusion applications. As a heat-treatable 6xxx series alloy, it presents some challenges in annealing for complex shapes or severe deformation.
Dimensions must conform to ANSI H35.2M table allowances. For dimensions not covered by this standard, tolerances should be mutually agreed between producer and purchaser and specified in contracts or purchase orders.
Both belong to the 6xxx series (Al-Mg-Si) aluminum alloys with similar compositions but differ in strength, machinability and surface finish.
| Property | 6061-T5 | 6063-T5 |
|---|---|---|
| Strength | Higher (~35,000 psi tensile strength) | Lower (~30,000 psi tensile strength) |
| Hardness | Harder (~95 Brinell) | Softer (~60 Brinell) |
| Machinability | Better | Moderate |
| Corrosion Resistance | Very Good | Excellent |
| Surface Finish | Moderate | Superior (ideal for anodizing) |
| Extrudability/Formability | More difficult | Easier |
| Cost | Higher | Lower |
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti |
|---|---|---|---|---|---|---|---|---|
| 6063 | 0.2-0.6 | 0.35 | 0.1 | 0.1 | 0.45-0.9 | 0.1 | 0.1 | 0.1 |
| Alloy & Temper | Thickness (mm) | Tensile Strength | Yield Strength | Elongation (% min in 50mm) |
|---|---|---|---|---|
| 6063 T5 | <12mm | 150 | 110 | 8 |
No, 6063 aluminum is not as strong as 6061. The T6 temper comparison shows:
| Property | 6061-T6 | 6063-T6 |
|---|---|---|
| Tensile Strength | ~45,000 psi (310 MPa) | ~35,000 psi (241 MPa) |
| Yield Strength | ~40,000 psi (276 MPa) | ~31,000 psi (214 MPa) |
Selecting the right aluminum alloy can be challenging given the numerous options available. Among them, 6063-T5 aluminum alloy stands out with its unique advantages, offering excellent surface treatment properties, corrosion resistance, and superior workability. Widely used in construction and structural applications, this article provides an in-depth analysis of 6063-T5 aluminum alloy's characteristics, applications, and a detailed comparison with 6061-T5 to help guide your material selection.
6063-T5 is a medium-strength heat-treatable alloy renowned for its exceptional surface finish, corrosion resistance, and excellent workability. Primarily used in architectural and structural applications, this alloy contains 0.7% magnesium and 0.4% silicon, offering good mechanical properties suitable for various extruded profiles.
The alloy demonstrates excellent extrusion capabilities, enabling production of thin-walled and complex hollow shapes. Standard profiles include flat angles, channels, and hollow circular and square sections. 6063 responds well to polishing, chemical brightening, anodizing, and coloring processes.
The T5 temper designation describes the heat treatment process applied after forming:
6063 aluminum exhibits exceptional corrosion resistance due to its excellent anodizing capabilities. The anodizing process creates a thicker chemically-bonded oxidized layer that protects against further corrosion while providing an attractive, uniform appearance that can incorporate color pigments without peeling.
Considered a "softer" alloy, 6063-T5 offers excellent machinability and extrudability - making it the most common choice for extrusion applications. As a heat-treatable 6xxx series alloy, it presents some challenges in annealing for complex shapes or severe deformation.
Dimensions must conform to ANSI H35.2M table allowances. For dimensions not covered by this standard, tolerances should be mutually agreed between producer and purchaser and specified in contracts or purchase orders.
Both belong to the 6xxx series (Al-Mg-Si) aluminum alloys with similar compositions but differ in strength, machinability and surface finish.
| Property | 6061-T5 | 6063-T5 |
|---|---|---|
| Strength | Higher (~35,000 psi tensile strength) | Lower (~30,000 psi tensile strength) |
| Hardness | Harder (~95 Brinell) | Softer (~60 Brinell) |
| Machinability | Better | Moderate |
| Corrosion Resistance | Very Good | Excellent |
| Surface Finish | Moderate | Superior (ideal for anodizing) |
| Extrudability/Formability | More difficult | Easier |
| Cost | Higher | Lower |
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti |
|---|---|---|---|---|---|---|---|---|
| 6063 | 0.2-0.6 | 0.35 | 0.1 | 0.1 | 0.45-0.9 | 0.1 | 0.1 | 0.1 |
| Alloy & Temper | Thickness (mm) | Tensile Strength | Yield Strength | Elongation (% min in 50mm) |
|---|---|---|---|---|
| 6063 T5 | <12mm | 150 | 110 | 8 |
No, 6063 aluminum is not as strong as 6061. The T6 temper comparison shows:
| Property | 6061-T6 | 6063-T6 |
|---|---|---|
| Tensile Strength | ~45,000 psi (310 MPa) | ~35,000 psi (241 MPa) |
| Yield Strength | ~40,000 psi (276 MPa) | ~31,000 psi (214 MPa) |
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