# 328.0-T6 Cast Aluminum

328.0-T6 aluminum is 328.0 aluminum in the T6 temper. To achieve this temper, the metal is solution heat-treated and artificially aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare 328.0-T6 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

Brinell Hardness

82

Elastic (Young's, Tensile) Modulus

72 *GPa* 10 *x 10 ^{6} psi*

Elongation at Break

2.1 *%*

Fatigue Strength

55 *MPa* 8.0 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

27 *GPa* 3.9 *x 10 ^{6} psi*

Shear Strength

190 *MPa* 28 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

270 *MPa* 40 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

170 *MPa* 25 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

510 *J/g*

Maximum Temperature: Mechanical

180 *°C* 350 *°F*

Melting Completion (Liquidus)

620 *°C* 1140 *°F*

Melting Onset (Solidus)

560 *°C* 1050 *°F*

Solidification (Pattern Maker's) Shrinkage

1.3 *%*

Specific Heat Capacity

890 *J/kg-K* 0.21 *BTU/lb-°F*

Thermal Conductivity

120 *W/m-K* 70 *BTU/h-ft-°F*

Thermal Expansion

22 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

30 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

99 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

10 *% relative*

Density

2.7 *g/cm ^{3}* 170

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

140 *MJ/kg* 62 *x 10 ^{3} BTU/lb*

Embodied Water

1070 *L/kg* 130 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

5.0 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

200 *kJ/m ^{3}*

Stiffness to Weight: Axial

15 *points*

Stiffness to Weight: Bending

51 *points*

Strength to Weight: Axial

28 *points*

Strength to Weight: Bending

34 *points*

Thermal Diffusivity

50 *mm ^{2}/s*

Thermal Shock Resistance

12 *points*

## Alloy Composition

Al | 84.5 to 91.1 | |

Si | 7.5 to 8.5 | |

Cu | 1.0 to 2.0 | |

Zn | 0 to 1.5 | |

Fe | 0 to 1.0 | |

Mn | 0.2 to 0.6 | |

Mg | 0.2 to 0.6 | |

Cr | 0 to 0.35 | |

Ni | 0 to 0.25 | |

Ti | 0 to 0.25 | |

res. | 0 to 0.5 |

All values are % weight. Ranges represent what is permitted under applicable standards.

## Followup Questions

## Further Reading

ASTM B618: Standard Specification for Aluminum-Alloy Investment Castings

ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings

Iron in Aluminium Alloys: Impurity and Alloying Element, N. A. Belov et al., 2002

Handbook of Aluminum Bonding Technology and Data, J. D. Minford, 1993