# 355.0-T51 Cast Aluminum

355.0-T51 aluminum is 355.0 aluminum in the T51 temper. To achieve this temper, the metal is artificially underaged. The degree of underaging is different from T53 and T54. It has the lowest strength compared to the other variants of 355.0 aluminum.

The graph bars on the material properties cards below compare 355.0-T51 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

72

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

1.5 *%*

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

150 *MPa* 22 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

150 *MPa* 21 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

470 *J/g*

Maximum Temperature: Mechanical

180 *°C* 350 *°F*

Melting Completion (Liquidus)

620 *°C* 1150 *°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

170 *W/m-K* 97 *BTU/h-ft-°F*

Thermal Expansion

22 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

43 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

140 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

9.5 *% relative*

Density

2.7 *g/cm ^{3}* 170

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

150 *MJ/kg* 64 *x 10 ^{3} BTU/lb*

Embodied Water

1120 *L/kg* 130 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

2.7 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

150 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

51 *points*

Strength to Weight: Axial

20 *points*

Strength to Weight: Bending

28 *points*

Thermal Diffusivity

69 *mm ^{2}/s*

Thermal Shock Resistance

9.1 *points*

## Alloy Composition

Al | 90.3 to 94.1 | |

Si | 4.5 to 5.5 | |

Cu | 1.0 to 1.5 | |

Mg | 0.4 to 0.6 | |

Fe | 0 to 0.6 | |

Mn | 0 to 0.5 | |

Zn | 0 to 0.35 | |

Cr | 0 to 0.25 | |

Ti | 0 to 0.25 | |

res. | 0 to 0.15 |

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 B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings

ASTM B26: Standard Specification for Aluminum-Alloy Sand Castings

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

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