MakeItFrom.com
Menu (ESC)

B390.0 (B390.0-F, SC174B, A23900) Cast Aluminum

B390.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. B390.0 is the Aluminum Association (AA) designation for this material. A23900 is the UNS number. Older literature may refer to this material as ASTM SC174B, but this is now discouraged.

It has a moderately low embodied energy among the ANSI/AA cast aluminums in the database.

The graph bars on the material properties cards below compare B390.0 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

76 GPa 11 x 106 psi

Elongation at Break

0.88 %

Fatigue Strength

170 MPa 25 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

29 GPa 4.1 x 106 psi

Tensile Strength: Ultimate (UTS)

320 MPa 46 x 103 psi

Tensile Strength: Yield (Proof)

250 MPa 36 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)

580 °C 1080 °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

27 % IACS

Electrical Conductivity: Equal Weight (Specific)

88 % IACS

Otherwise Unclassified Properties

Base Metal Price

11 % relative

Density

2.8 g/cm3 170 lb/ft3

Embodied Carbon

7.3 kg CO2/kg material

Embodied Energy

130 MJ/kg 57 x 103 BTU/lb

Embodied Water

940 L/kg 110 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

2.6 MJ/m3

Resilience: Unit (Modulus of Resilience)

410 kJ/m3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

51 points

Strength to Weight: Axial

32 points

Strength to Weight: Bending

38 points

Thermal Diffusivity

55 mm2/s

Thermal Shock Resistance

15 points

Alloy Composition

Among cast aluminum alloys, the composition of B390.0 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.

Aluminum (Al) 72.7 to 79.6
Silicon (Si) 16 to 18
Copper (Cu) 4.0 to 5.0
Zinc (Zn) 0 to 1.5
Iron (Fe) 0 to 1.3
Magnesium (Mg) 0.45 to 0.65
Manganese (Mn) 0 to 0.5
Nickel (Ni) 0 to 0.1
Titanium (Ti) 0 to 0.1
Residuals 0 to 0.2

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

Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984

ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993