A390.0-T7 Cast Aluminum
A390.0-T7 aluminum is A390.0 aluminum in the T7 temper. To achieve this temper, the metal is solution heat-treated and stabilized by artificial overaging. The graph bars on the material properties cards below compare A390.0-T7 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
0.87 %
Fatigue Strength
100 MPa 15 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
28 GPa 4.1 x 106 psi
Tensile Strength: Ultimate (UTS)
260 MPa 37 x 103 psi
Tensile Strength: Yield (Proof)
260 MPa 37 x 103 psi
Thermal Properties
Latent Heat of Fusion
640 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
580 °C 1080 °F
Melting Onset (Solidus)
480 °C 900 °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
20 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
20 % IACS
Electrical Conductivity: Equal Weight (Specific)
67 % 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
140 MJ/kg 58 x 103 BTU/lb
Embodied Water
950 L/kg 110 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
2.2 MJ/m3
Resilience: Unit (Modulus of Resilience)
440 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
52 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
33 points
Thermal Diffusivity
56 mm2/s
Thermal Shock Resistance
12 points
Alloy Composition
| Al | 75.3 to 79.6 | |
| Si | 16 to 18 | |
| Cu | 4.0 to 5.0 | |
| Mg | 0.45 to 0.65 | |
| Fe | 0 to 0.5 | |
| 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
Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993