Aluminum 7039 Alloy (UNS A97039)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


Aluminium / aluminum is one of the lightest available commercial metals with a density approximately one-third that of steel or copper. It can be easily fabricated into many forms such as foil, sheets, rod, tube, geometric shapes, and wire.

Aluminium / aluminum 7039 alloy is a heat treatable wrought alloy. The following datasheet will provide more details about aluminium / aluminum 7039 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 7039 alloy.

Element Content (%)
Zinc, Zn 3.5 - 4.5
Magnesium, Mg 2.3 - 3.3
Silicon, Si 0.3 max
Iron, Fe 0.4 max
Chromium, Cr 0.15 - 0.25
Manganese, Mn 0.1 - 0.4
Copper, Cu 0.1 max
Titanium, Ti 0.1 max
Remainder (total) 0.15 max
Aluminum, Al Remainder

Physical Properties

The physical properties of aluminium / aluminum 7039 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.74 g/cm³ 0.0990 lb/in³
Melting point 482-638°C 900-1180 °F

Mechanical Properties

The mechanical properties of aluminium / aluminum 7039-T64 alloy are tabulated below.

Properties Metric Imperial
Tensile strength (@diameter 12.7 mm/0.500 in) 450 MPa 65300 psi
Yield strength (@diameter 12.7 mm/0.500 in) 380 MPa 55100 psi
Elongation at break (@diameter 12.7 mm/0.500 in) 13% 13%
Elastic modulus 69.6 GPa 10100 ksi
Shear strength 255 MPa 37000 psi
Hardness, Brinell (@load 500 kg; thickness 10.0 mm/1100 lb;0.394 in) 133 133
Hardness, Knoop (converted from Brinell hardness value) 167 167
Hardness, Rockwell A (converted from Brinell hardness value) 50 50
Hardness, Rockwell B (converted from brinell hardness value) 81 81
Hardness, Vickers (converted from Brinell hardness value) 153 153

Thermal Properties

The thermal properties of aluminium / aluminum 7039-T64 alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 23.4 µm/m°C 13 µin/in°F
Thermal conductivity 140 W/mK 972 BTU in/hr.ft².°F


Aluminium / aluminum 7039 alloy is chiefly used as an armor alloy.

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