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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.

Aluminum (Al) 94.1 to 97.8
Magnesium (Mg) 1.6 to 2.6
Manganese (Mn) 0.6 to 1.1
Iron (Fe) 0 to 0.7
Silicon (Si) 0 to 0.4
Chromium (Cr) 0 to 0.3
Zinc (Zn) 0 to 0.3
Copper (Cu) 0 to 0.3
Titanium (Ti) 0 to 0.1
Residuals 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