324.0 Cast Aluminum
324.0 aluminum is an aluminum alloy formulated for casting. 324.0 is the Aluminum Association (AA) designation for this material. Additionally, the UNS number is A03240.
The properties of 324.0 aluminum include three 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 324.0 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
71 GPa 10 x 106 psi
Elongation at Break
3.0 to 4.0 %
Fatigue Strength
77 to 89 MPa 11 to 13 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Tensile Strength: Ultimate (UTS)
210 to 310 MPa 30 to 45 x 103 psi
Tensile Strength: Yield (Proof)
110 to 270 MPa 16 to 39 x 103 psi
Thermal Properties
Latent Heat of Fusion
500 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
610 °C 1120 °F
Melting Onset (Solidus)
550 °C 1010 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
150 W/m-K 85 BTU/h-ft-°F
Thermal Expansion
21 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
34 % IACS
Electrical Conductivity: Equal Weight (Specific)
120 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
7.9 kg CO2/kg material
Embodied Energy
150 MJ/kg 63 x 103 BTU/lb
Embodied Water
1090 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
6.8 to 8.9 MJ/m3
Resilience: Unit (Modulus of Resilience)
85 to 510 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
52 points
Strength to Weight: Axial
22 to 32 points
Strength to Weight: Bending
29 to 38 points
Thermal Diffusivity
62 mm2/s
Thermal Shock Resistance
9.7 to 14 points
Alloy Composition
Among cast aluminum alloys, the composition of 324.0 aluminum is notable for containing a comparatively high amount of silicon (Si). Silicon is used to improve casting fluidity and lower melting temperature. It also has a strengthening effect.
| Al | 87.3 to 92.2 | |
| Si | 7.0 to 8.0 | |
| Fe | 0 to 1.2 | |
| Mg | 0.4 to 0.7 | |
| Zn | 0 to 1.0 | |
| Cu | 0.4 to 0.6 | |
| Mn | 0 to 0.5 | |
| Ni | 0 to 0.3 | |
| Ti | 0 to 0.2 | |
| res. | 0 to 0.2 |
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
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993