# 1050-H12 Aluminum

1050-H12 aluminum is 1050 aluminum in the H12 temper. To achieve this temper, the metal is strain hardened to a strength that is roughly a quarter of the way between annealed (O) and full-hard (H18). The graph bars on the material properties cards below compare 1050-H12 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

10 *%*

Fatigue Strength

56 *MPa* 8.1 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

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

Shear Strength

57 *MPa* 8.3 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

96 *MPa* 14 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

73 *MPa* 11 *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)

9.1 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

39 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

50 *points*

Strength to Weight: Axial

9.9 *points*

Strength to Weight: Bending

17 *points*

Thermal Diffusivity

94 *mm ^{2}/s*

Thermal Shock Resistance

4.3 *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