EN AW-6066 · AlSi1.4MgCuMn
The strongest of the mainstream 6000-series forging and extrusion alloys — copper and manganese push T6 strength well past 6082 while retaining better corrosion behavior than the 2000 series it can replace.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | 0.9 – 1.8 |
| Fe | ≤ 0.50 |
| Cu | 0.7 – 1.2 |
| Mn | 0.6 – 1.1 |
| Mg | 0.8 – 1.4 |
| Cr | ≤ 0.40 |
| Zn | ≤ 0.25 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.72 g/cm³ |
| Melting range | 563 – 645 °C |
| Thermal expansion (20–100 °C) | 23.2 µm/m·K |
| Elastic modulus | 69 GPa |
| Thermal conductivity | 147 W/m·K |
| Electrical conductivity | 37 % IACS |
Strength Data
Mechanical properties by temper
Typical room-temperature values for orientation. Design minimums depend on product form, thickness and the governing specification — request the applicable table with your inquiry.
| Temper | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| T4 | 205 | 360 | 18 | 90 |
| T6 / T651 | 360 | 395 | 12 | 120 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlSi1.4MgCuMn |
| EN numeric | EN AW-6066 |
| UNS | A96066 |
| Werkstoff-Nr. | — |
| Common product standards | AMS QQ-A-200/10 · ASTM B221 · EN 573-3 |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Bar / Flat | AMS QQ-A-200/10 | 6066 | T6 | Aerospace & Defense |
| Plate | EN AW | 6066 | T651 | General Industry |
| Cold-Drawn Bar | EN 754-2 | 6066 | T4 | Cold Drawing |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-6066 is the right answer
- High-strength forgings and extrusions
- Motorcycle and bicycle components
- Ordnance hardware
- Loaded machine parts
Specifying EN AW-6066?
State the temper, product form, dimensions and governing standard from the tables above, and we will confirm availability with a firm price and delivery date — typically within one business day.
Request a QuoteMaterial Engineering
Not sure EN AW-6066 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.