Aluminum 7029 Alloy (UNS A97029)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications

Introduction

Aluminium / aluminum has a density that is about one-third that of steel. It has excellent resistance to corrosion due to the thin layer of aluminium oxide that forms on the surface of aluminium when it is exposed to air.

Aluminium / aluminum 7000 series consist of the alloying element - zinc in a larger quantity. Aluminium / aluminum 7029 alloy is a heat treatable wrought alloy. The following datasheet will provide more details about aluminium / aluminum 7029 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 7029 alloy.

Element Content (%)
Zinc, Zn 4.2-5.2
Magnesium, Mg 1.3-2
Copper, Cu 0.5-0.9
Manganese, Mn 0.3 max
Iron, Fe 0.12 max
Silicon, Si 0.1 max
Titanium, Ti 0.05 max
Vanadium, Va 0.05 max
Other (each) 0.03 max
Other (total) 0.1 max
Aluminum, Al Remainder

Physical Properties

The physical properties of aluminium / aluminum 7029 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.77 g/cm³ 0.100 lb/in³

Mechanical Properties

The mechanical properties of aluminium / aluminum 7029-T5 alloy are tabulated below.

Properties Metric Imperial
Tensile strength 430 MPa 62400 psi
Yield strength 380 MPa 55100 psi
Poisson’s ratio 0.33 0.33
Elongation at break (@diameter 12.7 mm/0.500 in) 15% 15%
Elastic modulus 72 GPa 10400 ksi
Shear strength 260 MPa 37700 psi
Hardness, Brinell (@load 500 kg; thickness 10.0 mm/1100 lb;0.394 in) 115 115
Hardness, Knoop (converted from Brinell hardness value) 141 141
Hardness, Rockwell A (converted from Brinell hardness value) 43.6 43.6
Hardness, Rockwell B (converted from Brinell hardness value) 71 71
Hardness, Vickers (converted from Brinell hardness value) 128 128

Thermal Properties

The thermal properties of aluminium / aluminum 7029-T5 alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 23.6 µm/m°C 13.1 µin/in°F
Thermal conductivity 140 W/mK 972 BTU in/hr.ft².°F

Applications

Aluminium / aluminum 7029 alloy is chiefly used in the following areas:

  • Automotive industry
  • Aviation industry

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