# 1050-H18 Aluminum

1050-H18 aluminum is 1050 aluminum in the H18 temper. This is the strongest temper normally produced through the action of only strain hardening. It has the highest strength compared to the other variants of 1050 aluminum.

The graph bars on the material properties cards below compare 1050-H18 aluminum to: 1000-series alloys (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

68 *GPa* 9.9 *x 10 ^{6} psi*

Elongation at Break

4.6 *%*

Fatigue Strength

48 *MPa* 6.9 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

26 *GPa* 3.7 *x 10 ^{6} psi*

Shear Strength

81 *MPa* 12 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

120 *MPa* 18 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

400 *J/g*

Maximum Temperature: Mechanical

170 *°C* 340 *°F*

Melting Completion (Liquidus)

640 *°C* 1190 *°F*

Melting Onset (Solidus)

650 *°C* 1190 *°F*

Specific Heat Capacity

900 *J/kg-K* 0.22 *BTU/lb-°F*

Thermal Conductivity

230 *W/m-K* 130 *BTU/h-ft-°F*

Thermal Expansion

24 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

61 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

200 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

9.5 *% relative*

Calomel Potential

-750 *mV*

Density

2.7 *g/cm ^{3}* 170

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

1200 *L/kg* 140 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

6.1 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

110 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

50 *points*

Strength to Weight: Axial

14 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

94 *mm ^{2}/s*

Thermal Shock Resistance

6.2 *points*

## Alloy Composition

Al | 99.5 to 100 | |

Fe | 0 to 0.4 | |

Si | 0 to 0.25 | |

Mn | 0 to 0.050 | |

Zn | 0 to 0.050 | |

Cu | 0 to 0.050 | |

Mg | 0 to 0.050 | |

V | 0 to 0.050 | |

Ti | 0 to 0.030 |

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

## Followup Questions

## Further Reading

ASTM B491: Standard Specification for Aluminum and Aluminum-Alloy Extruded Round Tubes for General-Purpose Applications

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

Aluminum Standards and Data, Aluminum Association Inc., 2013

ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties

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