392.0 (392.0-F, S19, A03920) Cast Aluminum
392.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 392.0 is the Aluminum Association (AA) designation for this material. A03920 is the UNS number. Older literature may refer to this material as ASTM S19, but this is now discouraged.
It has the lowest density and a moderately low ductility among ANSI/AA cast aluminums.
The graph bars on the material properties cards below compare 392.0 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
75 GPa 11 x 106 psi
Elongation at Break
0.86 %
Fatigue Strength
190 MPa 27 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
28 GPa 4.1 x 106 psi
Tensile Strength: Ultimate (UTS)
290 MPa 42 x 103 psi
Tensile Strength: Yield (Proof)
270 MPa 39 x 103 psi
Thermal Properties
Latent Heat of Fusion
670 J/g
Maximum Temperature: Mechanical
170 °C 340 °F
Melting Completion (Liquidus)
670 °C 1240 °F
Melting Onset (Solidus)
580 °C 1080 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
130 W/m-K 77 BTU/h-ft-°F
Thermal Expansion
19 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
25 % IACS
Electrical Conductivity: Equal Weight (Specific)
90 % IACS
Otherwise Unclassified Properties
Base Metal Price
10 % relative
Density
2.5 g/cm3 160 lb/ft3
Embodied Carbon
7.5 kg CO2/kg material
Embodied Energy
140 MJ/kg 59 x 103 BTU/lb
Embodied Water
950 L/kg 110 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
2.4 MJ/m3
Resilience: Unit (Modulus of Resilience)
490 kJ/m3
Stiffness to Weight: Axial
17 points
Stiffness to Weight: Bending
56 points
Strength to Weight: Axial
32 points
Strength to Weight: Bending
39 points
Thermal Diffusivity
60 mm2/s
Thermal Shock Resistance
15 points
Alloy Composition
Among cast aluminum alloys, the composition of 392.0 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 | 73.9 to 80.6 | |
| Si | 18 to 20 | |
| Mg | 0.8 to 1.2 | |
| Fe | 0 to 1.5 | |
| Cu | 0.4 to 0.8 | |
| Mn | 0.2 to 0.6 | |
| Ni | 0 to 0.5 | |
| Zn | 0 to 0.5 | |
| Sn | 0 to 0.3 | |
| Ti | 0 to 0.2 | |
| res. | 0 to 0.5 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
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
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993