7129 aluminium alloy

Aluminium 7129 alloy is a heat treatable wrought alloy.^[1]

Chemical composition

Element[1]	Weight Percentage (%)
Aluminum	90.9 - 94
Zinc	4.2 - 5.2
Magnesium	1.3 - 2
Copper	0.50 - 0.90
Iron	≤ 0.30
Titanium	≤ 0.050
Vanadium	≤ 0.050
Gallium	≤ 0.030
Silicon	≤ 0.15
Chromium	≤ 0.10
Manganese	≤ 0.10
Remainder (each)	≤ 0.050
Remainder (total)	≤ 0.15

Properties

Properties	Metric
Density[1]	2.78 g/cm3
Youngs modulus[2]	69 GPa
Elongation at Break[2]	9.0 % to 9.1 %
Fatigue Strength[2]	150 to 190 MPa
Shear Modulus[2]	26 GPa
Shear Strength[2]	250 to 260 MPa
Tensile Strength: Ultimate (UTS)[2]	430 MPa
Specific Heat Capacity[2]	880 J/kg-K
Thermal Conductivity[2]	150 W/m-K

Applications

1. Aircraft manufacturing sector^[1]