May 8 2013
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