5082 (AlMg4.5, 3.3345) Aluminum
5082 aluminum is a 5000-series aluminum alloy: the main alloying addition is magnesium, and it is formulated for primary forming into wrought products. 5082 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-5082. Additionally, the EN chemical designation is AlMg4,5. And the UNS number is A95082.
It originally received its standard designation in 1963.
The properties of 5082 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 5082 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
Elastic (Young's, Tensile) Modulus
67 GPa 9.8 x 106 psi
Elongation at Break
1.1 %
Fatigue Strength
110 to 130 MPa 15 to 19 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
25 GPa 3.7 x 106 psi
Shear Strength
210 to 230 MPa 31 to 33 x 103 psi
Tensile Strength: Ultimate (UTS)
380 to 400 MPa 54 to 58 x 103 psi
Tensile Strength: Yield (Proof)
300 to 340 MPa 44 to 50 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
180 °C 360 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
560 °C 1040 °F
Specific Heat Capacity
910 J/kg-K 0.22 BTU/lb-°F
Thermal Conductivity
130 W/m-K 76 BTU/h-ft-°F
Thermal Expansion
24 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
32 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.9 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)
4.0 to 4.3 MJ/m3
Resilience: Unit (Modulus of Resilience)
670 to 870 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
51 points
Strength to Weight: Axial
39 to 41 points
Strength to Weight: Bending
43 to 45 points
Thermal Diffusivity
54 mm2/s
Thermal Shock Resistance
17 to 18 points
Alloy Composition
Among wrought aluminum alloys, the composition of 5082 aluminum is notable for containing a comparatively high amount of magnesium (Mg). Magnesium promotes hardenability through both heat treatment and strain hardening mechanisms. It also increases susceptibility to intergranular corrosion.
| Al | 93.5 to 96 | |
| Mg | 4.0 to 5.0 | |
| Fe | 0 to 0.35 | |
| Zn | 0 to 0.25 | |
| Si | 0 to 0.2 | |
| Mn | 0 to 0.15 | |
| Cr | 0 to 0.15 | |
| Cu | 0 to 0.15 | |
| Ti | 0 to 0.1 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993
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