Aluminium alloy 4015 is a high-quality, general-purpose alloy combining good ductility with useful mechanical strength. It is closely related to the 3103 Al–Mn alloy, but with a higher silicon content, which enhances certain performance characteristics. The alloy is suitable for welding, anodising, and painting*. However, it should be noted that the anodised finish of alloy 4015 is significantly darker and less reflective than that of alloys 1050 or 3103, making it unsuitable for decorative anodised applications. Many users have transitioned to alloy 4015 from traditional alloys such as 1050 and 3103 due to its balanced properties.The corrosion resistance of alloy 4015 is comparable to that of 3000 series alloys. It performs well in mill finish or painted condition, but is not recommended for aggressive environments.* Anodised finishes on alloy 4015 will be darker and less reflective than on alloys 1050 or 3103.Note: Mechanical properties quoted in this datasheet relate to the H14 temper.
Alloy 4015 is typically used for:
Alloy: 4015
Spec: BS EN 573-3:2009
| Chemical Element | % Present |
|---|---|
| Iron (Fe) | 0.00 – 0.70 |
| Copper (Cu) | 0.00 – 0.20 |
| Magnesium (Mg) | 0.10 – 0.50 |
| Silicon (Si) | 1.40 – 2.20 |
| Zinc (Zn) | 0.00 – 0.20 |
| Manganese (Mn) | 0.60 – 1.20 |
| Other (Each) | 0.00 – 0.05 |
| Others (Total) | 0.00 – 0.15 |
| Aluminium (Al) | Balance |
| Property | Value |
|---|---|
| Density | 2.72 g/cm³ |
| Melting Point | 600 °C |
| Thermal Expansion | 24 × 10⁻⁶ /K |
| Modulus of Elasticity | 70 GPa |
| Thermal Conductivity | 150 – 200 W/m·K |
| Electrical Resistivity | 0.023 – 0.029 × 10⁻⁶ Ω·m |
Sheet: 0.20 mm to 3.00 mm
Spec: BS EN 485-2:2008
| Property | Value |
|---|---|
| Tensile Strength | 150 – 200 MPa |
| Proof Stress | 120 MPa (Min) |
| Hardness (Brinell) | 50 HB |
Corresponds broadly to alloy 3103 in the same temper, but may not be a direct equivalent.
Common tempers for aluminium alloy 4015 include:
Suitable for MIG and TIG welding using standard aluminium welding practices. Recommended filler wire: 4043 (AlSi5).
Bend performance is thickness-dependent. Approximate minimum r/t values for a 180° bend in H12 temper are shown below:
| Thickness | Min r/t |
|---|---|
| 0.5 – 0.8 mm | 0.00 |
| 0.8 – 1.5 mm | 1.00 |
| 1.5 – 3.0 mm | 2.00 |
