7129 aluminium alloy explained

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

Chemical composition

Element	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	2.78 g/cm^3
Youngs modulus^[2]	69 GPa
Elongation at Break	9.0 % to 9.1 %
Fatigue Strength	150 to 190 MPa
Shear Modulus	26 GPa
Shear Strength	250 to 260 MPa
Tensile Strength: Ultimate (UTS)	430 MPa
Specific Heat Capacity	880 J/kg-K
Thermal Conductivity	150 W/m-K

Applications

1. Aircraft manufacturing sector

External links

1. Comparison of 6061 and 7129 alloy
2. http://www.matweb.com/search/datasheet.aspx?matguid=d62fafde9ffe4ef68614c5e2ab5869e5

Notes and References

1. Web site: 9 May 2013. 7129 aluminum alloy. live. https://web.archive.org/web/20201202093558/https://www.azom.com/article.aspx?ArticleID=8774 . 2020-12-02 .
2. Web site: 7129 aluminum properties. live. https://web.archive.org/web/20161115042624/http://www.makeitfrom.com:80/material-properties/7129-AlZn4.5Mg1.5CuA-A97129-Aluminum . 2016-11-15 .