A384.0 (A384-F, A13840) Cast Aluminum
A384.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. A384.0 is the Aluminum Association (AA) designation for this material. A13840 is the UNS number.
The graph bars on the material properties cards below compare A384.0 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
Elastic (Young's, Tensile) Modulus
74 GPa 11 x 106 psi
Elongation at Break
2.5 %
Fatigue Strength
140 MPa 20 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
28 GPa 4.0 x 106 psi
Shear Strength
200 MPa 29 x 103 psi
Tensile Strength: Ultimate (UTS)
330 MPa 48 x 103 psi
Tensile Strength: Yield (Proof)
170 MPa 24 x 103 psi
Thermal Properties
Latent Heat of Fusion
550 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
610 °C 1130 °F
Melting Onset (Solidus)
510 °C 950 °F
Specific Heat Capacity
880 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
96 W/m-K 56 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
23 % IACS
Electrical Conductivity: Equal Weight (Specific)
73 % IACS
Otherwise Unclassified Properties
Base Metal Price
11 % relative
Density
2.8 g/cm3 180 lb/ft3
Embodied Carbon
7.5 kg CO2/kg material
Embodied Energy
140 MJ/kg 60 x 103 BTU/lb
Embodied Water
1010 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
6.9 MJ/m3
Resilience: Unit (Modulus of Resilience)
180 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
32 points
Strength to Weight: Bending
38 points
Thermal Diffusivity
39 mm2/s
Thermal Shock Resistance
15 points
Alloy Composition
Among cast aluminum alloys, the composition of A384.0 aluminum is notable for containing comparatively high amounts of silicon (Si) and copper (Cu). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect. Copper is used to improve strength. This comes at the cost of a decrease in corrosion resistance and weldability.
| Al | 79.3 to 86.5 | |
| Si | 10.5 to 12 | |
| Cu | 3.0 to 4.5 | |
| Fe | 0 to 1.3 | |
| Zn | 0 to 1.0 | |
| Mn | 0 to 0.5 | |
| Ni | 0 to 0.5 | |
| Sn | 0 to 0.35 | |
| Mg | 0 to 0.1 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993