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7050-T73511 Aluminum

7050-T73511 aluminum is 7050 aluminum in the T73511 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 (extrusion or tube). The degree of overaging is chosen so as to maximize stress corrosion resistance. The metal is straightened after the stretching operation. This temper is closely related to T73510, which does not permit such straightening.

The graph bars on the material properties cards below compare 7050-T73511 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

12 %

Fatigue Strength

190 MPa 27 x 103 psi

Poisson's Ratio

0.32

Shear Modulus

26 GPa 3.8 x 106 psi

Shear Strength

300 MPa 43 x 103 psi

Tensile Strength: Ultimate (UTS)

500 MPa 72 x 103 psi

Tensile Strength: Yield (Proof)

440 MPa 63 x 103 psi

Thermal Properties

Latent Heat of Fusion

370 J/g

Maximum Temperature: Mechanical

190 °C 380 °F

Melting Completion (Liquidus)

630 °C 1170 °F

Melting Onset (Solidus)

490 °C 910 °F

Specific Heat Capacity

860 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

140 W/m-K 82 BTU/h-ft-°F

Thermal Expansion

24 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

35 % IACS

Electrical Conductivity: Equal Weight (Specific)

100 % IACS

Otherwise Unclassified Properties

Base Metal Price

10 % relative

Density

3.1 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

1120 L/kg 130 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

55 MJ/m3

Resilience: Unit (Modulus of Resilience)

1350 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

45 points

Strength to Weight: Axial

45 points

Strength to Weight: Bending

45 points

Thermal Diffusivity

54 mm2/s

Thermal Shock Resistance

21 points

Alloy Composition

Aluminum (Al) 87.3 to 92.1
Zinc (Zn) 5.7 to 6.7
Copper (Cu) 2.0 to 2.6
Magnesium (Mg) 1.9 to 2.6
Zirconium (Zr) 0.080 to 0.15
Iron (Fe) 0 to 0.15
Silicon (Si) 0 to 0.12
Manganese (Mn) 0 to 0.1
Titanium (Ti) 0 to 0.060
Chromium (Cr) 0 to 0.040
Residuals 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

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

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