May 8 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Introduction
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 |
Applications
Aluminium / aluminum 7039 alloy is chiefly used as an armor alloy.