# 535.0 (535.0-F, GM70B, A05350) Cast Aluminum

535.0 aluminum is an aluminum alloy formulated for casting. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. 535.0 is the Aluminum Association (AA) designation for this material. A05350 is the UNS number. Older literature may refer to this material as ASTM GM70B, but this is now discouraged.

The graph bars on the material properties cards below compare 535.0 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

70

Elastic (Young's, Tensile) Modulus

67 *GPa* 9.7 *x 10 ^{6} psi*

Elongation at Break

10 *%*

Fatigue Strength

70 *MPa* 10 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

25 *GPa* 3.6 *x 10 ^{6} psi*

Shear Strength

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

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

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

## Thermal Properties

Latent Heat of Fusion

390 *J/g*

Maximum Temperature: Mechanical

170 *°C* 340 *°F*

Melting Completion (Liquidus)

630 *°C* 1170 *°F*

Melting Onset (Solidus)

570 *°C* 1060 *°F*

Solidification (Pattern Maker's) Shrinkage

1.3 *%*

Specific Heat Capacity

910 *J/kg-K* 0.22 *BTU/lb-°F*

Thermal Conductivity

100 *W/m-K* 58 *BTU/h-ft-°F*

Thermal Expansion

24 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

23 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

79 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

9.5 *% relative*

Density

2.6 *g/cm ^{3}* 160

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

160 *MJ/kg* 67 *x 10 ^{3} BTU/lb*

Embodied Water

1180 *L/kg* 140 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

24 *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

28 *points*

Strength to Weight: Bending

35 *points*

Thermal Diffusivity

42 *mm ^{2}/s*

Thermal Shock Resistance

12 *points*

## Alloy Composition

Among cast aluminum alloys, the composition of 535.0 aluminum is notable for including boron (B) and beryllium (Be). Boron is used as a grain refiner, and to improve electrical conductivity. Beryllium is used to reduce oxidation at elevated temperatures, at the cost of substantial toxicity.

Al | 91.5 to 93.6 | |

Mg | 6.2 to 7.5 | |

Mn | 0.1 to 0.25 | |

Ti | 0.1 to 0.25 | |

Si | 0 to 0.15 | |

Fe | 0 to 0.15 | |

Cu | 0 to 0.050 | |

Be | 0.0030 to 0.0070 | |

B | 0 to 0.0050 | |

res. | 0 to 0.15 |

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

## Followup Questions

## Similar Alloys

## 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

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

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015