Metals & alloys · Aluminium alloys
6061 aluminium alloy
A versatile heat-treatable Al–Mg–Si alloy used for structural extrusions, machined parts and welded assemblies where moderate strength and corrosion resistance are required.
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01
Overview
- Material class
- Metals & alloys
- Category
- Aluminium alloys
- Family
- Aluminium Alloy
- Product forms
- Sheet/plate, Bar/rod
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Mg | 0.8 | 1.2 | 1 | |
| Si | 0.4 | 0.8 | 0.6 | |
| Cu | 0.15 | 0.4 | 0.28 | |
| Cr | 0.04 | 0.35 | 0.2 | |
| Fe | 0.7 | 0.32 | ||
| Mn | 0.15 | 0.05 | ||
| Zn | 0.25 | 0.05 | ||
| Ti | 0.15 | 0.03 | ||
| Al | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 2.7 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 69 | GPa | Representative; verify product form and condition |
| Thermal conductivity | 167–180 | W/m·K | temper and product dependent |
| Yield strength | ~240–276 | MPa | T6/T651 representative |
| Tensile strength | ~290–310 | MPa | T6/T651 representative |
| Elongation | 8–17 | % | product dependent |
Conditions
O annealed
Annealed, high-formability condition.
T4
Solution heat treated and naturally aged.
T6
Solution heat treated and artificially aged.
T651
T6-type condition with stress relief by stretching.
03
Processing and use
Processing
- Solution heat treatment and artificial aging control strength.
- Fusion welding softens the heat-affected zone unless restored by subsequent treatment.
Applications
- Structural profiles
- Machine frames
- Transport components
- General machined and welded parts
Selection considerations
- Use temper- and thickness-specific properties.
- For higher strength consider 7xxx alloys; for superior extrusion finish consider 6xxx alternatives.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| AA | 6061 | |
| UNS | A96061 | |
| EN | EN AW-6061 | |
| ASTM | B209/B221/B308 | depending product form |
05
Sources and context
Sources
- Hydro Alloy 6061 data sheetExisting reference
- Federal Highway Administration materials resourcesApplication reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Extremely broad availability in extrusions, plate, sheet, bar and tube.
Highly recyclable with established closed-loop extrusion and sheet scrap systems.
Strategic context
Established engineering material with documented processing–performance relationships.