# 7178-T6510 Aluminum

7178-T6510 aluminum is 7178 aluminum in the T6510 temper. To achieve this temper, the metal is solution heat-treated, stress relieved, then artificially aged. The stress relief is accomplished by stretching the metal by an amount that depends on the type of standard wrought product being made (extrusion or tube). The metal is not straightened after the stretching operation. This temper is closely related to T6511, which permits such straightening.

It has the second lowest ductility compared to the other variants of 7178 aluminum.

The graph bars on the material properties cards below compare 7178-T6510 aluminum to: 7000-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

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

Elongation at Break

4.6 *%*

Fatigue Strength

180 *MPa* 27 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Shear Modulus

27 *GPa* 3.9 *x 10 ^{6} psi*

Shear Strength

370 *MPa* 54 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

640 *MPa* 93 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

550 *MPa* 80 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

370 *J/g*

Maximum Temperature: Mechanical

180 *°C* 350 *°F*

Melting Completion (Liquidus)

630 *°C* 1170 *°F*

Melting Onset (Solidus)

480 *°C* 890 *°F*

Specific Heat Capacity

860 *J/kg-K* 0.2 *BTU/lb-°F*

Thermal Conductivity

130 *W/m-K* 72 *BTU/h-ft-°F*

Thermal Expansion

23 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

31 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

91 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

10 *% relative*

Density

3.1 *g/cm ^{3}* 190

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

150 *MJ/kg* 62 *x 10 ^{3} BTU/lb*

Embodied Water

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

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

28 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

2140 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

45 *points*

Strength to Weight: Axial

58 *points*

Strength to Weight: Bending

54 *points*

Thermal Diffusivity

47 *mm ^{2}/s*

Thermal Shock Resistance

28 *points*

## Alloy Composition

Al | 85.4 to 89.5 | |

Zn | 6.3 to 7.3 | |

Mg | 2.4 to 3.1 | |

Cu | 1.6 to 2.4 | |

Fe | 0 to 0.5 | |

Cr | 0.18 to 0.28 | |

Si | 0 to 0.4 | |

Mn | 0 to 0.3 | |

Ti | 0 to 0.2 | |

res. | 0 to 0.15 |

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

## Followup Questions

## Further Reading

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003

ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

Aluminum Standards and Data, Aluminum Association Inc., 2013

ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993

EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products