Aluminium / UNS A96351
6351 is a medium-to-high-strength heat-treatable extrusion alloy used for structural and transport applications.
- UNS A96351
- Spec Aluminum Association
- Density 2.71 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| UNS | A96351 |
| Also known as | AA6351 |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| Si | 0.7 | 1.3 |
| Fe | — | 0.50 |
| Cu | — | 0.10 |
| Mn | 0.40 | 0.8 |
| Mg | 0.40 | 0.8 |
| Zn | — | 0.20 |
| Ti | — | 0.20 |
| Al | Bal. | — |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 2.71 g/cm³ | 0.098 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 6351: Structural sections, transport. Structural and architectural extrusions, marine and transport structures, machined components and aerospace parts.
Aluminium 6351 vs Aluminium 6061
| Aluminium 6351 | Aluminium 6061 | |
|---|---|---|
| UNS | A96351 | A96061 |
| Key property | Structural extrusion alloy | Versatile heat-treatable alloy |
| Typical use | Structural sections, transport | Structures, machined parts, marine |
| Cr (wt %) | — | 0.04–0.35 |
| Ni (wt %) | — | — |
| Mo (wt %) | — | — |
| C (wt %) | — | — |
| Tensile / yield (min, MPa) | — | 290 / 240 |
Frequently asked questions
What is the UNS number of Aluminium 6351?
Aluminium 6351 is designated UNS A96351.
What is Aluminium 6351 used for?
Structural extrusion alloy. Typical uses: structural sections, transport.
Is Aluminium 6351 magnetic?
Non-magnetic.
In which forms can I buy Aluminium 6351 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 6351?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
What is the difference between Aluminium 6351 and Aluminium 6061?
Aluminium 6351: structural extrusion alloy. 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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