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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.

Aluminum (Al) 93.5 to 96
Magnesium (Mg) 4.0 to 5.0
Iron (Fe) 0 to 0.35
Zinc (Zn) 0 to 0.25
Silicon (Si) 0 to 0.2
Manganese (Mn) 0 to 0.15
Chromium (Cr) 0 to 0.15
Copper (Cu) 0 to 0.15
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 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