Aluminium / UNS A96063
6063 is the architectural extrusion alloy, with an excellent surface finish for anodising and good corrosion resistance at moderate strength.
- UNS A96063
- Spec ASTM B221 / Aluminum Association
- Density 2.69 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| UNS | A96063 |
| Also known as | AA6063 |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| Si | 0.20 | 0.6 |
| Fe | — | 0.35 |
| Cu | — | 0.10 |
| Mn | — | 0.10 |
| Mg | 0.45 | 0.9 |
| Cr | — | 0.10 |
| Zn | — | 0.10 |
| Ti | — | 0.10 |
| Al | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 205 MPa (29.7 ksi) |
| Yield strength, 0.2% offset (min) | 170 MPa (24.7 ksi) |
| Elongation in 50 mm (min) | 8 % |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 2.69 g/cm³ | 0.097 lb/in³ |
| Magnetic response | Non-magnetic | — |
Available forms & specifications
| Form | Specification | Size range |
|---|---|---|
| Sheets & plates | ASTM B209 | 0.3 mm – 6 mm |
| Extruded bars, rods & profiles | ASTM B221 | 3 mm – 500 mm |
| Drawn tube | ASTM B210 | 1/8" – 24" NB |
| Pipe | ASTM B241 | 1/8" – 24" NB |
Corrosion & temperature resistance
5xxx and 6xxx alloys have good atmospheric and marine corrosion resistance; high-strength 2xxx alloys need cladding or coating in corrosive environments.
Applications
Aluminium 6063: Window frames, profiles, trims. Structural and architectural extrusions, marine and transport structures, machined components and aerospace parts.
Aluminium 6063 vs Aluminium 6061
| Aluminium 6063 | Aluminium 6061 | |
|---|---|---|
| UNS | A96063 | A96061 |
| Key property | Architectural extrusions | Versatile heat-treatable alloy |
| Typical use | Window frames, profiles, trims | Structures, machined parts, marine |
| Cr (wt %) | ≤ 0.10 | 0.04–0.35 |
| Ni (wt %) | — | — |
| Mo (wt %) | — | — |
| C (wt %) | — | — |
| Tensile / yield (min, MPa) | 205 / 170 | 290 / 240 |
Frequently asked questions
What is the UNS number of Aluminium 6063?
Aluminium 6063 is designated UNS A96063.
What is Aluminium 6063 used for?
Architectural extrusions. Typical uses: window frames, profiles, trims.
Is Aluminium 6063 magnetic?
Non-magnetic.
In which forms can I buy Aluminium 6063 from Rajkamal Metals?
Coils & Strips, Sheets & Plates, Pipes & Tubes, Round Bars & Rods, Structural Sections, Custom Orders. Sizes as per standard; other sizes on request.
Do you supply a Mill Test Certificate with Aluminium 6063?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
What is the difference between Aluminium 6063 and Aluminium 6061?
Aluminium 6063: architectural extrusions. Aluminium 6061: versatile heat-treatable alloy. See the comparison table on this page.
Last updated: 30 October 2026. Grade names identify the supply range; designations are not engineering equivalents. Availability, make, origin and documentation are confirmed at quotation.
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