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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.

Aluminum (Al) 95.2 to 98
Magnesium (Mg) 1.0 to 1.5
Manganese (Mn) 0.9 to 1.4
Iron (Fe) 0 to 0.7
Chromium (Cr) 0.1 to 0.3
Silicon (Si) 0 to 0.3
Zinc (Zn) 0 to 0.25
Copper (Cu) 0 to 0.25
Residuals 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