4015 (AlSi2Mn) Aluminum
4015 aluminum is a 4000-series aluminum alloy. The main alloying addition is silicon. 4015 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-4015. AlSi2Mn is the EN chemical designation. Additionally, the UNS number is A94015.
It originally received its standard designation in 1989.
The properties of 4015 aluminum include six common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 4015 aluminum to: 4000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
35 to 70
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
1.1 to 23 %
Fatigue Strength
46 to 71 MPa 6.7 to 10 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
82 to 120 MPa 12 to 18 x 103 psi
Tensile Strength: Ultimate (UTS)
130 to 220 MPa 19 to 32 x 103 psi
Tensile Strength: Yield (Proof)
50 to 200 MPa 7.3 to 29 x 103 psi
Thermal Properties
Latent Heat of Fusion
420 J/g
Maximum Temperature: Mechanical
160 °C 320 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
600 °C 1110 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
160 W/m-K 94 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
41 % IACS
Electrical Conductivity: Equal Weight (Specific)
130 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.1 kg CO2/kg material
Embodied Energy
150 MJ/kg 65 x 103 BTU/lb
Embodied Water
1160 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
2.4 to 24 MJ/m3
Resilience: Unit (Modulus of Resilience)
18 to 290 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
13 to 22 points
Strength to Weight: Bending
21 to 30 points
Thermal Diffusivity
66 mm2/s
Thermal Shock Resistance
5.7 to 9.7 points
Alloy Composition
Among wrought aluminum alloys, the composition of 4015 aluminum is notable for containing a comparatively high amount of silicon (Si). Silicon is used to increase strength at the expense of ductility. It also lowers the melting temperature and raises the fluidity of the alloy.
| Al | 94.9 to 97.9 | |
| Si | 1.4 to 2.2 | |
| Mn | 0.6 to 1.2 | |
| Fe | 0 to 0.7 | |
| Mg | 0.1 to 0.5 | |
| Zn | 0 to 0.2 | |
| Cu | 0 to 0.2 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 485-2: Aluminium and aluminium alloys. Sheet, strip and plate. Mechanical properties
ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015