7475-T7651 Aluminum
7475-T7651 aluminum is 7475 aluminum in the T7651 temper. To achieve this temper, the metal is solution heat-treated, stress relieved, then stabilized by artificial overaging. The stress relief is accomplished by stretching the metal by an amount that depends on the type of standard wrought product being made (sheet, plate, bar, or forging). The degree of overaging is chosen so as to maximize exfoliation corrosion resistance.
It has the second lowest strength compared to the other variants of 7475 aluminum.
The graph bars on the material properties cards below compare 7475-T7651 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
70 GPa 10 x 106 psi
Elongation at Break
11 %
Fatigue Strength
200 MPa 29 x 103 psi
Poisson's Ratio
0.32
Shear Modulus
26 GPa 3.8 x 106 psi
Shear Strength
320 MPa 47 x 103 psi
Tensile Strength: Ultimate (UTS)
540 MPa 78 x 103 psi
Tensile Strength: Yield (Proof)
460 MPa 67 x 103 psi
Thermal Properties
Latent Heat of Fusion
380 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
480 °C 890 °F
Specific Heat Capacity
870 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
140 W/m-K 81 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
33 % IACS
Electrical Conductivity: Equal Weight (Specific)
98 % IACS
Otherwise Unclassified Properties
Base Metal Price
10 % relative
Density
3.0 g/cm3 190 lb/ft3
Embodied Carbon
8.2 kg CO2/kg material
Embodied Energy
150 MJ/kg 63 x 103 BTU/lb
Embodied Water
1130 L/kg 130 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
57 MJ/m3
Resilience: Unit (Modulus of Resilience)
1510 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
46 points
Strength to Weight: Axial
50 points
Strength to Weight: Bending
49 points
Thermal Diffusivity
54 mm2/s
Thermal Shock Resistance
24 points
Alloy Composition
| Al | 88.6 to 91.6 | |
| Zn | 5.1 to 6.2 | |
| Mg | 1.9 to 2.6 | |
| Cu | 1.2 to 1.9 | |
| Cr | 0.18 to 0.25 | |
| Fe | 0 to 0.12 | |
| Si | 0 to 0.1 | |
| Mn | 0 to 0.060 | |
| Ti | 0 to 0.060 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
Aluminum Standards and Data, Aluminum Association Inc., 2013
ASM Specialty Handbook: Aluminum and Aluminum Alloys, J. R. Davis (editor), 1993
ISO 6361-2: Wrought aluminium and aluminium alloys - Sheets, strips and plates - Part 2: Mechanical properties
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products