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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.

Aluminum (Al) 73.9 to 80.6
Silicon (Si) 18 to 20
Magnesium (Mg) 0.8 to 1.2
Iron (Fe) 0 to 1.5
Copper (Cu) 0.4 to 0.8
Manganese (Mn) 0.2 to 0.6
Nickel (Ni) 0 to 0.5
Zinc (Zn) 0 to 0.5
Tin (Sn) 0 to 0.3
Titanium (Ti) 0 to 0.2
Residuals 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