2195 (2195-T8) Aluminum
2195 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. 2195 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-2195. Additionally, the UNS number is A92195.
It received its standard designation in 1992, making it a fairly young material.
The graph bars on the material properties cards below compare 2195 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
69 GPa 10 x 106 psi
Elongation at Break
9.3 %
Fatigue Strength
190 MPa 28 x 103 psi
Fracture Toughness
30 MPa-m1/2 27 x 103 psi-in1/2
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
350 MPa 51 x 103 psi
Tensile Strength: Ultimate (UTS)
590 MPa 86 x 103 psi
Tensile Strength: Yield (Proof)
560 MPa 82 x 103 psi
Thermal Properties
Latent Heat of Fusion
390 J/g
Maximum Temperature: Mechanical
210 °C 420 °F
Melting Completion (Liquidus)
660 °C 1220 °F
Melting Onset (Solidus)
550 °C 1020 °F
Specific Heat Capacity
900 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
34 % IACS
Electrical Conductivity: Equal Weight (Specific)
100 % IACS
Otherwise Unclassified Properties
Base Metal Price
31 % relative
Density
3.0 g/cm3 190 lb/ft3
Embodied Carbon
8.6 kg CO2/kg material
Embodied Energy
160 MJ/kg 70 x 103 BTU/lb
Embodied Water
1470 L/kg 180 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
54 MJ/m3
Resilience: Unit (Modulus of Resilience)
2290 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
46 points
Strength to Weight: Axial
55 points
Strength to Weight: Bending
53 points
Thermal Diffusivity
49 mm2/s
Thermal Shock Resistance
26 points
Alloy Composition
Among wrought aluminum alloys, the composition of 2195 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 | 91.9 to 94.9 | |
| Cu | 3.7 to 4.3 | |
| Li | 0.8 to 1.2 | |
| Mg | 0.25 to 0.8 | |
| Ag | 0.25 to 0.6 | |
| Mn | 0 to 0.25 | |
| Zn | 0 to 0.25 | |
| Zr | 0.080 to 0.16 | |
| 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