# A357.0 (A357.0-T61, A13570) Cast Aluminum

A357.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the T61 temper. To achieve this temper, the metal is solution heat-treated and artificially underaged. The degree of underaging is different from T64 and T65. A357.0 is the Aluminum Association (AA) designation for this material. A13570 is the UNS number.

The graph bars on the material properties cards below compare A357.0 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

Brinell Hardness

100

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

3.7 *%*

Fatigue Strength

100 *MPa* 15 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

26 *GPa* 3.8 *x 10 ^{6} psi*

Shear Strength

240 *MPa* 35 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

350 *MPa* 51 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

270 *MPa* 39 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

500 *J/g*

Maximum Temperature: Mechanical

170 *°C* 340 *°F*

Melting Completion (Liquidus)

610 *°C* 1130 *°F*

Melting Onset (Solidus)

560 *°C* 1050 *°F*

Specific Heat Capacity

900 *J/kg-K* 0.22 *BTU/lb-°F*

Thermal Conductivity

160 *W/m-K* 92 *BTU/h-ft-°F*

Thermal Expansion

21 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

40 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

140 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

12 *% relative*

Density

2.6 *g/cm ^{3}* 160

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

150 *MJ/kg* 65 *x 10 ^{3} BTU/lb*

Embodied Water

1110 *L/kg* 130 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

12 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

520 *kJ/m ^{3}*

Stiffness to Weight: Axial

15 *points*

Stiffness to Weight: Bending

53 *points*

Strength to Weight: Axial

38 *points*

Strength to Weight: Bending

43 *points*

Thermal Diffusivity

68 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Among cast aluminum alloys, the composition of A357.0 aluminum is notable for including beryllium (Be). Beryllium is used to reduce oxidation at elevated temperatures, at the cost of substantial toxicity.

Al | 90.8 to 93 | |

Si | 6.5 to 7.5 | |

Mg | 0.4 to 0.7 | |

Ti | 0.040 to 0.2 | |

Fe | 0 to 0.2 | |

Cu | 0 to 0.2 | |

Be | 0.040 to 0.070 | |

Mn | 0 to 0.1 | |

Zn | 0 to 0.1 | |

res. | 0 to 0.15 |

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

## Followup Questions

## Similar Alloys

## Further Reading

ASTM B686: Standard Specification for Aluminum Alloy Castings, High-Strength

ASTM B108: Standard Specification for Aluminum-Alloy Permanent Mold Castings

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

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993