5449 (AlMg2Mn0.8(B), A95449) Aluminum
5449 aluminum is a 5000-series aluminum alloy: the main alloying addition is magnesium, and it is formulated for primary forming into wrought products. 5449 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-5449. A95449 is the UNS number. Additionally, the EN chemical designation is AlMg2Mn0,8(B).
It received its standard designation in 1994, making it a fairly young material.
The properties of 5449 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 5449 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
69 GPa 10 x 106 psi
Elongation at Break
4.0 to 17 %
Fatigue Strength
78 to 120 MPa 11 to 18 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
130 to 190 MPa 19 to 28 x 103 psi
Tensile Strength: Ultimate (UTS)
210 to 330 MPa 31 to 48 x 103 psi
Tensile Strength: Yield (Proof)
91 to 260 MPa 13 to 37 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)
590 °C 1090 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
140 W/m-K 80 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
35 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.8 g/cm3 170 lb/ft3
Embodied Carbon
8.5 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)
12 to 29 MJ/m3
Resilience: Unit (Modulus of Resilience)
60 to 480 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
22 to 33 points
Strength to Weight: Bending
29 to 39 points
Thermal Diffusivity
56 mm2/s
Thermal Shock Resistance
9.4 to 15 points
Alloy Composition
Among wrought aluminum alloys, the composition of 5449 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 | 94.1 to 97.8 | |
| Mg | 1.6 to 2.6 | |
| Mn | 0.6 to 1.1 | |
| Fe | 0 to 0.7 | |
| Si | 0 to 0.4 | |
| Cr | 0 to 0.3 | |
| Zn | 0 to 0.3 | |
| Cu | 0 to 0.3 | |
| 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 vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
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