# 2095 (2095-T8) Aluminum

2095 aluminum is a 2000-series aluminum alloy: the main alloying addition is copper, and it is formulated for primary forming into wrought products. Cited properties are appropriate for the T8 temper. To achieve this temper, the metal is solution heat-treated, strain hardened, then artificially aged. 2095 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-2095. Additionally, the UNS number is A92095.

It originally received its standard designation in 1990.

It has the highest tensile strength among the 2000-series alloys in the database.

The graph bars on the material properties cards below compare 2095 aluminum to: 2000-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

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

Elongation at Break

8.5 *%*

Fatigue Strength

200 *MPa* 29 *x 10 ^{3} psi*

Fracture Toughness

20 *MPa-m ^{1/2}* 18

*x 10*

^{3}psi-in^{1/2}Poisson's Ratio

0.33

Shear Modulus

26 *GPa* 3.8 *x 10 ^{6} psi*

Shear Strength

410 *MPa* 60 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

700 *MPa* 100 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

610 *MPa* 88 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

390 *J/g*

Maximum Temperature: Mechanical

210 *°C* 410 *°F*

Melting Completion (Liquidus)

660 *°C* 1220 *°F*

Melting Onset (Solidus)

540 *°C* 1010 *°F*

Specific Heat Capacity

910 *J/kg-K* 0.22 *BTU/lb-°F*

Thermal Conductivity

130 *W/m-K* 77 *BTU/h-ft-°F*

Thermal Expansion

23 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

35 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

110 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

31 *% relative*

Density

3.0 *g/cm ^{3}* 190

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

160 *MJ/kg* 70 *x 10 ^{3} BTU/lb*

Embodied Water

1470 *L/kg* 170 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

57 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

2640 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

46 *points*

Strength to Weight: Axial

65 *points*

Strength to Weight: Bending

59 *points*

Thermal Diffusivity

49 *mm ^{2}/s*

Thermal Shock Resistance

31 *points*

## Alloy Composition

Among wrought aluminum alloys, the composition of 2095 aluminum is notable for including lithium (Li) and silver (Ag). Lithium is used to improve mechanical properties at the cost of increased fabrication difficulty. Silver is used to improve strength and resistance to stress corrosion cracking.

Al | 91.3 to 94.9 | |

Cu | 3.9 to 4.6 | |

Li | 0.7 to 1.5 | |

Mg | 0.25 to 0.8 | |

Ag | 0.25 to 0.6 | |

Mn | 0 to 0.25 | |

Zn | 0 to 0.25 | |

Zr | 0.040 to 0.18 | |

Fe | 0 to 0.15 | |

Si | 0 to 0.12 | |

Ti | 0 to 0.1 | |

res. | 0 to 0.15 |

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

## Followup Questions

## Similar Alloys

## Further Reading

Aluminum-Lithium Alloys: Processing, Properties, and Applications, N. Eswara Prasad et al. (editors), 2013

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