5040 (AlMg1.5Mn, A95040) Aluminum
5040 aluminum is a 5000-series aluminum alloy: the main alloying addition is magnesium, and it is formulated for primary forming into wrought products. 5040 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-5040. A95040 is the UNS number. Additionally, the EN chemical designation is AlMg1,5Mn.
It originally received its standard designation in 1961.
The properties of 5040 aluminum include four 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 5040 aluminum to: 5000-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
66 to 74
Elastic (Young's, Tensile) Modulus
70 GPa 10 x 106 psi
Elongation at Break
5.7 to 6.8 %
Fatigue Strength
100 to 130 MPa 15 to 19 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
140 to 150 MPa 20 to 22 x 103 psi
Tensile Strength: Ultimate (UTS)
240 to 260 MPa 34 to 37 x 103 psi
Tensile Strength: Yield (Proof)
190 to 230 MPa 28 to 34 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
190 °C 370 °F
Melting Completion (Liquidus)
650 °C 1200 °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 92 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
2.8 g/cm3 170 lb/ft3
Embodied Carbon
8.3 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1180 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
14 to 15 MJ/m3
Resilience: Unit (Modulus of Resilience)
260 to 380 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
24 to 26 points
Strength to Weight: Bending
31 to 32 points
Thermal Diffusivity
64 mm2/s
Thermal Shock Resistance
10 to 11 points
Alloy Composition
Among wrought aluminum alloys, the composition of 5040 aluminum is notable for containing a comparatively high amount of manganese (Mn). Manganese is used to improve strength without a proportional reduction in ductility. It also improves workability by controlling the grain structure of the alloy.
| Al | 95.2 to 98 | |
| Mg | 1.0 to 1.5 | |
| Mn | 0.9 to 1.4 | |
| Fe | 0 to 0.7 | |
| Cr | 0.1 to 0.3 | |
| Si | 0 to 0.3 | |
| Zn | 0 to 0.25 | |
| Cu | 0 to 0.25 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
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