# 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 10 ^{6} psi*

Elongation at Break

2.5 *%*

Fatigue Strength

140 *MPa* 20 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

28 *GPa* 4.0 *x 10 ^{6} psi*

Shear Strength

200 *MPa* 29 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

330 *MPa* 48 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

170 *MPa* 24 *x 10 ^{3} 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/cm ^{3}* 180

*lb/ft*

^{3}Embodied Carbon

7.5 *kg CO _{2}/kg material*

Embodied Energy

140 *MJ/kg* 60 *x 10 ^{3} BTU/lb*

Embodied Water

1010 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

6.9 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

180 *kJ/m ^{3}*

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 *mm ^{2}/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