A strong aluminium alloy containing nominally 2% copper and 1.5% magnesium. Produced as bar, plate and tube. Also available as clad sheet and strip. Solution treated and artificially aged to achieve the T6 condition or with the addition of controlled stretching to achieve the T6511 temper. 2618A can be employed to a maximum of 300°C and retains mechanical strength relatively well to around 200°C and above. The alloy has a density of 2.75 g/cc.
Alloy 2618A is typically used for:
Alloy 2618A
Spec: weight % for DTD 5014A
| Chemical Element | % Present |
|---|---|
| Silicon (Si) | 0.0 - 0.25 |
| Iron (Fe) | 0.9 - 1.4 |
| Copper (Cu) | 1.8 - 2.7 |
| Manganese (Mn) | 0.0 - 0.2 |
| Magnesium (Mg) | 1.2 - 1.8 |
| Chromium (Cr) | — |
| Nickel (Ni) | 0.8 - 1.4 |
| Zinc (Zn) | 0.0 - 0.1 |
| Titanium + Zirconium (Ti+Zr) | 0.0 - 0.2 |
| Lead + Tin (Pb+Sn) | 0.0 - 0.05 |
| Titanium (Ti) | 0.0 - 0.2 |
| Aluminium (Al) | Balance |
Alloy 2618A
| Property | Value |
|---|---|
| Density | 2.75 g/cm³ |
Spec: Minima for T6 Condition Bar/Sections - DTD5014A
| Thickness Over (mm) | Thickness Up To (mm) | 0.2% Proof Stress (Min) | Tensile Strength UTS (Min) | Elongation % on 50 mm (Min) |
|---|---|---|---|---|
| — | 10 | 320 MPa | 400 MPa | 5 % |
| 10 | 100 | 340 MPa | 420 MPa | 7 % |
Weldability ratings:
