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390.0-T5 Cast Aluminum

390.0-T5 aluminum is 390.0 aluminum in the T5 temper. To achieve this temper, the metal is artificially aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare 390.0-T5 aluminum to: ANSI/AA cast aluminums (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

120

Elastic (Young's, Tensile) Modulus

75 GPa 11 x 106 psi

Elongation at Break

1.0 %

Fatigue Strength

110 MPa 16 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

28 GPa 4.1 x 106 psi

Tensile Strength: Ultimate (UTS)

300 MPa 43 x 103 psi

Tensile Strength: Yield (Proof)

270 MPa 38 x 103 psi

Thermal Properties

Latent Heat of Fusion

640 J/g

Maximum Temperature: Mechanical

170 °C 340 °F

Melting Completion (Liquidus)

650 °C 1200 °F

Melting Onset (Solidus)

560 °C 1030 °F

Specific Heat Capacity

880 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

130 W/m-K 77 BTU/h-ft-°F

Thermal Expansion

18 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

24 % IACS

Electrical Conductivity: Equal Weight (Specific)

79 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

2.7 g/cm3 170 lb/ft3

Embodied Carbon

7.3 kg CO2/kg material

Embodied Energy

130 MJ/kg 58 x 103 BTU/lb

Embodied Water

950 L/kg 110 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

2.9 MJ/m3

Resilience: Unit (Modulus of Resilience)

470 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

52 points

Strength to Weight: Axial

30 points

Strength to Weight: Bending

36 points

Thermal Diffusivity

56 mm2/s

Thermal Shock Resistance

15 points

Alloy Composition

Aluminum (Al) 74.5 to 79.6
Silicon (Si) 16 to 18
Copper (Cu) 4.0 to 5.0
Iron (Fe) 0 to 1.3
Magnesium (Mg) 0.45 to 0.65
Titanium (Ti) 0 to 0.2
Manganese (Mn) 0 to 0.1
Zinc (Zn) 0 to 0.1
Residuals 0 to 0.2

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

ASTM B85: Standard Specification for Aluminum-Alloy Die Castings

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015