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
| Al | 74.5 to 79.6 | |
| Si | 16 to 18 | |
| Cu | 4.0 to 5.0 | |
| Fe | 0 to 1.3 | |
| Mg | 0.45 to 0.65 | |
| Ti | 0 to 0.2 | |
| Mn | 0 to 0.1 | |
| Zn | 0 to 0.1 | |
| res. | 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