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7129-T6 Aluminum

7129-T6 aluminum is 7129 Aluminum in the T6 temper. To achieve this temper, the metal is solution heat-treated and artificially aged until it meets standard mechanical property requirements. The graph bars on the material properties cards below compare 7129-T6 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

9.0 %

Fatigue Strength

150 MPa 22 x 103 psi

Poisson's Ratio

0.33

Shear Modulus

26 GPa 3.8 x 106 psi

Shear Strength

250 MPa 37 x 103 psi

Tensile Strength: Ultimate (UTS)

430 MPa 62 x 103 psi

Tensile Strength: Yield (Proof)

390 MPa 56 x 103 psi

Thermal Properties

Latent Heat of Fusion

380 J/g

Maximum Temperature: Mechanical

180 °C 350 °F

Melting Completion (Liquidus)

630 °C 1170 °F

Melting Onset (Solidus)

510 °C 960 °F

Specific Heat Capacity

880 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

40 % IACS

Electrical Conductivity: Equal Weight (Specific)

120 % IACS

Otherwise Unclassified Properties

Base Metal Price

9.5 % relative

Density

2.9 g/cm3 180 lb/ft3

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

150 MJ/kg 65 x 103 BTU/lb

Embodied Water

1150 L/kg 140 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

37 MJ/m3

Resilience: Unit (Modulus of Resilience)

1090 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

47 points

Strength to Weight: Axial

41 points

Strength to Weight: Bending

43 points

Thermal Diffusivity

58 mm2/s

Thermal Shock Resistance

19 points

Alloy Composition

Aluminum (Al)Al 91 to 94
Zinc (Zn)Zn 4.2 to 5.2
Magnesium (Mg)Mg 1.3 to 2.0
Copper (Cu)Cu 0.5 to 0.9
Iron (Fe)Fe 0 to 0.3
Silicon (Si)Si 0 to 0.15
Manganese (Mn)Mn 0 to 0.1
Chromium (Cr)Cr 0 to 0.1
Titanium (Ti)Ti 0 to 0.050
Vanadium (V)V 0 to 0.050
Gallium (Ga)Ga 0 to 0.030
Residualsres. 0 to 0.15

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

Followup Questions

Further Reading

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012

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