Aluminium Alloys
Aluminium alloys are materials made primarily of aluminium and one or more other elements, such as silicon, magnesium, copper, zinc, or manganese. These elements are added to enhance aluminium's mechanical properties, including strength, corrosion resistance, and machinability, making it suitable for various industrial and engineering applications.
Chemical Composition of Aluminium Alloys
| Alloy Series |
Aluminium (Al) (%) |
Primary Alloying Element |
Other Elements |
Max Impurities (%) |
| 1xxx (Pure Aluminium) |
99.0 - 99.9 |
None |
Si, Fe |
0.05 |
| 2xxx (Al-Cu) |
90.0 - 96.0 |
Copper (3.5 - 5.0) |
Mg, Mn |
0.15 |
| 5xxx (Al-Mg) |
90.0 - 97.0 |
Magnesium (3.0 - 5.5) |
Mn, Cr |
0.10 |
| 6xxx (Al-Mg-Si) |
90.0 - 96.0 |
Mg (0.8 - 1.2), Si (0.4 - 0.8) |
Fe, Cu |
0.15 |
| 7xxx (Al-Zn) |
85.0 - 92.0 |
Zn (5.0 - 7.0), Mg (2.0 - 3.0) |
Cu, Cr |
0.20 |
Mechanical Properties of Aluminium Alloys
| Alloy Series |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
| 1xxx (Pure Aluminium) |
60 - 130 |
15 - 35 |
20 - 30 |
| 2xxx (Al-Cu) |
300 - 470 |
200 - 380 |
10 - 20 |
| 5xxx (Al-Mg) |
200 - 350 |
100 - 250 |
15 - 25 |
| 6xxx (Al-Mg-Si) |
240 - 310 |
150 - 275 |
10 - 25 |
| 7xxx (Al-Zn) |
500 - 600 |
400 - 500 |
8 - 15 |
