# 1070-H26 Aluminum

1070-H26 aluminum is 1070 aluminum in the H26 temper. To achieve this temper, the metal is strain hardened, and then partially annealed, to a strength that is roughly 3/4 of the way between annealed (O) and full-hard (H28).

The graph bars on the material properties cards below compare 1070-H26 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

4.5 *%*

Fatigue Strength

48 *MPa* 7.0 *x 10 ^{3} psi*

Poisson's Ratio

0.33

Shear Modulus

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

Shear Strength

67 *MPa* 9.8 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

120 *MPa* 17 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

86 *MPa* 12 *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)

640 *°C* 1180 *°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

23 *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*

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)

4.8 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

54 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

50 *points*

Strength to Weight: Axial

12 *points*

Strength to Weight: Bending

20 *points*

Thermal Diffusivity

94 *mm ^{2}/s*

Thermal Shock Resistance

5.2 *points*

## Alloy Composition

Al | 99.7 to 100 | |

Fe | 0 to 0.25 | |

Si | 0 to 0.2 | |

V | 0 to 0.050 | |

Zn | 0 to 0.040 | |

Cu | 0 to 0.040 | |

Mn | 0 to 0.030 | |

Ti | 0 to 0.030 | |

Mg | 0 to 0.030 | |

res. | 0 to 0.030 |

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

## Followup Questions

## Further Reading

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

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

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

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