6063 aluminum is the most widely extruded alloy worldwide. Its magnesium and silicon content (Al-Mg-Si system) allows it to be heat-treated to moderate strength (T5, T6 tempers) while maintaining excellent extrudability, smooth surface finish and bright anodizing response, making it the default choice for architectural profiles, T-slot modular framing systems, furniture, heat sinks and general fabrication.
We supply 6063 aluminum extrusions in T5 (general-purpose), T6 (higher strength), and T66 (T6 with additional heat treatment for architectural window/door frames per GB/T 5237). Surface finishes include mill, anodized (clear, black, bronze), powder coated and electrophoresis.
Table of Contents
- Chemical Composition
- Mechanical & Physical Properties
- 6063 Profile Specifications
- 6063 Profile Weight Examples
- Surface Finishes
- Applications
- 6063 vs 6061 vs 6082
- 6063 Aluminum Profiles Aluminum Profile Export Markets
- 6063 Standards & Equivalent Grades
- 6063 Profiles Aluminum Profile Supply & Packing
- Frequently Asked Questions
Chemical Composition
| Element | Weight % |
|---|---|
| Silicon (Si) | 0.20 – 0.6 |
| Magnesium (Mg) | 0.45 – 0.9 |
| Iron (Fe) | ≤ 0.35 |
| Copper (Cu) | ≤ 0.10 |
| Manganese (Mn) | ≤ 0.10 |
| Chromium (Cr) | ≤ 0.10 |
| Zinc (Zn) | ≤ 0.10 |
| Titanium (Ti) | ≤ 0.10 |
| Aluminum (Al) | Remainder |
Mg₂Si precipitates formed during aging provide the strengthening mechanism.
Mechanical & Physical Properties
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HW) |
|---|---|---|---|---|
| O (annealed) | 90 | 50 | ≥ 20 | — |
| T5 | 160 – 190 | 110 – 145 | 8 – 12 | 8 – 10 |
| T6 | 205 – 240 | 170 – 215 | 8 – 12 | 10 – 12 |
| T66 (GB/T 5237) | ≥ 205 | ≥ 170 | ≥ 8 | ≥ 10 |
T5: cooled from extrusion and artificially aged. T6: solution heat treated, quenched and aged. T66: T6 with additional requirements for architectural profiles.
| Property | Value |
|---|---|
| Density | 2.70 g/cm³ |
| Melting range | 615 – 655 °C |
| Thermal conductivity | 200 – 220 W/m·K |
| Electrical conductivity | 50 – 55% IACS |
| Elastic modulus | 69 GPa |
| CTE (20–100°C) | 23.4 × 10⁻⁶ /°C |
6063 Profile Specifications
| Application / Type | Cross-Section (mm) | Wall Thickness (mm) | Temper |
|---|---|---|---|
| Architectural (window/door) | Per design drawing | 1.4 – 3.0 mm | T5, T66 |
| Curtain wall mullions | Per design drawing | 2.5 – 5.0 mm | T5, T6 |
| T-slot modular frames | 20×20 to 90×90 mm | 1.5 – 4.0 mm | T5, T6 |
| Heat sinks | Custom fin spacing | 1.0 – 3.0 mm | T5 |
| Furniture tubes | Round/square/rect tubes | 1.0 – 3.0 mm | T5 |
| LED housings | Custom cross-sections | 1.0 – 2.5 mm | T5 |
Standard extrusion profiles. Custom cross-sections, lengths and surface finishes available on request.
6063 Profile Weight Examples
| Profile | Cross-Section Area (mm²) | Weight (kg/m) | Weight per 6 m (kg) |
|---|---|---|---|
| Round tube Ø25×2 | 148 | 0.400 | 2.40 |
| Round tube Ø50×3 | 444 | 1.199 | 7.19 |
| Square tube 40×40×3 | 441 | 1.191 | 7.14 |
| Rectangular tube 80×40×3 | 684 | 1.847 | 11.08 |
| Flat bar 50×10 | 500 | 1.350 | 8.10 |
| Round bar Ø40 | 1257 | 3.394 | 20.36 |
Weight (kg/m) = cross-section area (mm²) × density (g/cm³) ÷ 1000. Theoretical values for sharp-cornered sections; actual weight varies with corner radii and tolerance.
Surface Finishes
- Mill Finish: Natural extruded surface
- Anodized: AAMA 611 Class I (≥18 µm outdoor) / Class II (≥10 µm indoor); colors: clear, black, bronze, champagne, gold
- Powder Coated: Qualicoat Class 1 / Class 2; polyester or PVDF; 60 – 120 µm thickness; RAL colors
- Electrophoresis: Uniform coating for complex profiles; common in Chinese architectural market
- Wood Grain Transfer: Heat-transfer film for timber appearance on aluminum
- Brushed / Polished: Decorative finishes for furniture and interior trim
Applications
- Architectural: window/door frames, curtain walls, partitions, railings, cladding
- T-slot: modular frames, machine guards, workbenches, CNC structures, automation
- Heat sinks: LED lighting, power electronics, amplifiers, servers
- Furniture: aluminum frames, shelving, display stands
- Solar: photovoltaic mounting rails and frames
- Transportation: bus interior trim, truck body frames
6063 vs 6061 vs 6082
| Property | 6063 | 6061 | 6082 |
|---|---|---|---|
| Extrudability | Excellent | Good | Fair |
| Tensile strength, T6 | 205 – 240 MPa | ≥ 260 MPa | ≥ 310 MPa |
| Surface finish | Excellent | Good | Good |
| Anodizing appearance | Best | Good | Good |
| Typical use | Architectural, T-slot, heat sinks | Structural, marine, transport | High-strength structural |
6063: easiest to extrude, best surface. 6061: higher strength. 6082: highest strength but harder to extrude.
6063 Aluminum Profiles Aluminum Profile Export Markets
We export 6063 Aluminum Profiles aluminum profiles (also written "aluminium profiles") in standard lengths (3m, 6m) or cut-to-length on FOB, CFR and CIF terms. Main destinations and typical uses:
- Southeast Asia – Vietnam (Ho Chi Minh City, Hai Phong), Malaysia (Port Klang), Thailand (Laem Chabang), Indonesia (Jakarta, Surabaya), Philippines (Manila): architectural window/door frames, T-slot automation frames, furniture and heat sinks.
- North America – Mexico (Manzanillo, Veracruz): construction profiles, T-slot workbenches, furniture frames and solar mounting.
- Middle East – UAE (Jebel Ali), Saudi Arabia (Jeddah, Dammam), Israel (Haifa, Ashdod): curtain wall systems, architectural cladding, furniture and solar rails.
- Africa – Nigeria (Lagos), South Africa (Durban): window/door frames, T-slot structures, furniture and general fabrication.
6063 Standards & Equivalent Grades
| System | Designation / Standard |
|---|---|
| AA / ASTM | 6063 (ASTM B221) |
| UNS | A96063 |
| EN | EN AW-6063 (AlMg0.7Si) |
| GB (China) | 6063 (GB/T 5237 architectural, GB/T 6892 industrial) |
| JIS | A6063 |
| Extrusion standards | ASTM B221, EN 755-2 (properties), EN 755-9 / EN 12020 (tolerances), JIS H4100 |
| China standards | GB/T 6892 (industrial profiles), GB/T 5237 (architectural profiles) |
6063 Profiles Aluminum Profile Supply & Packing
- Standard Lengths: 3 meters, 6 meters, or cut-to-length up to 6m
- Custom Extrusion: Custom cross-sections, slots, holes and machining available (tooling charge applies)
- Surface Finish: Mill finish, anodized (clear, silver, black, gold, bronze), powder coated (RAL colors), electrophoresis
- Packing: Profiles wrapped in protective film, bundled with corner protectors, shrink-wrapped or in wooden crates for export
- Documents: Mill test certificate (EN 10204 3.1), certificate of origin, material compliance declaration
- MOQ: 500 kg per profile for standard extrusions; 1 – 3 tons for custom tooling orders
- Lead time: 15 – 25 days for standard profiles; 30 – 40 days for custom extrusions (including tooling)
- Terms: FOB, CFR, CIF; payment by T/T or L/C
Frequently Asked Questions
What is the difference between 6063-T5 and 6063-T6?
T5: profiles are cooled from extrusion temperature and artificially aged without solution heat treatment. T6: profiles are solution heat treated at 530°C, water quenched and aged, giving about 20 – 30% higher strength than T5. T5 is more economical for general-purpose profiles; T6 for structural applications.
Can 6063 aluminum be welded?
Yes, 6063 can be welded using TIG or MIG with ER4043 or ER5356 filler. The heat-affected zone will soften to near-O temper strength. For non-structural joints this is acceptable; for structural welds, design accordingly or re-heat-treat after welding.
What is T66 temper?
T66 is a Chinese standard temper (GB/T 5237) for architectural profiles: T6 treatment with additional requirements for tensile strength ≥205 MPa, yield ≥170 MPa and hardness ≥10 HW for window and door frame extrusions.
Why is 6063 better than 6061 for architectural profiles?
6063 extrudes more easily into complex hollow shapes (multi-cavity window frames, curtain wall mullions), produces a smoother mill finish, and anodizes to a brighter, more uniform appearance. 6061 is stronger but harder to extrude and less attractive after anodizing.
Related Grades
Standard Aluminum Profiles
Off-the-shelf angles, channels, tubes and bars for immediate delivery
2020 / 2040 T-Slot Aluminum Profiles
Lightweight T-slot extrusions for desktop machines and robotics
3030 / 3060 T-Slot Aluminum Profiles
Medium-duty T-slot extrusions for CNC tables and automation frames
45-Series T-Slot Aluminum Profiles
Heavy-duty T-slot extrusions for industrial CNC and automation
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