7108A-T66 Aluminum
7108A-T66 aluminum is 7108A aluminum in the T66 temper. To achieve this temper, the metal is solution heat-treated and artificially aged, with additional process control to yield more favourable properties.
The graph bars on the material properties cards below compare 7108A-T66 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
69 GPa 10 x 106 psi
Elongation at Break
11 %
Fatigue Strength
120 MPa 18 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
210 MPa 31 x 103 psi
Tensile Strength: Ultimate (UTS)
350 MPa 51 x 103 psi
Tensile Strength: Yield (Proof)
290 MPa 42 x 103 psi
Thermal Properties
Latent Heat of Fusion
380 J/g
Maximum Temperature: Mechanical
210 °C 410 °F
Melting Completion (Liquidus)
630 °C 1170 °F
Melting Onset (Solidus)
520 °C 970 °F
Specific Heat Capacity
870 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
150 W/m-K 86 BTU/h-ft-°F
Thermal Expansion
24 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
36 % IACS
Electrical Conductivity: Equal Weight (Specific)
110 % IACS
Otherwise Unclassified Properties
Base Metal Price
10 % relative
Density
2.9 g/cm3 180 lb/ft3
Embodied Carbon
8.3 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1150 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
38 MJ/m3
Resilience: Unit (Modulus of Resilience)
610 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
47 points
Strength to Weight: Axial
34 points
Strength to Weight: Bending
38 points
Thermal Diffusivity
59 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
| Al | 91.6 to 94.4 | |
| Zn | 4.8 to 5.8 | |
| Mg | 0.7 to 1.5 | |
| Zr | 0.15 to 0.25 | |
| Fe | 0 to 0.3 | |
| Si | 0 to 0.2 | |
| Mn | 0 to 0.050 | |
| Cu | 0 to 0.050 | |
| Cr | 0 to 0.040 | |
| Ti | 0 to 0.030 | |
| Ga | 0 to 0.030 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Handbook of Aluminum vol. 2: Alloy Production and Materials Manufacturing, George Totten and D. Scott MacKenzie (editors), 2003
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products