Sep 21 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Cold Working
Welding
Forming
Machinability
Heat Treatment
Applications
Introduction
Aluminium / Aluminum alloys have high electrical conductivity and
strong corrosion resistance characteristics. These alloys are good
low-temperature alloys. They gain strength when exposed to subzero
temperatures and lose strength when exposed to high temperatures.
Aluminum alloys are sensitive to high temperatures ranging between 200
and 250°C (392 and 482°F).
The following datasheet provides an overview of Aluminium / Aluminum
7475 alloy.
Chemical Composition
The chemical composition of Aluminium / Aluminum 7475 alloy is
outlined in the following table.
| Element |
Content
(%) |
| Aluminum, Al |
90.3 |
| Zinc, Zn |
5.7 |
| Magnesium, Mg |
2.3 |
| Silicon, Si |
1.50 |
| Chromium, Cr |
0.22 |
Physical Properties
The following table shows the physical properties of Aluminium /
Aluminum 7475 alloy.
| Properties |
Metric |
Imperial |
| Density |
2.6-2.8 g/cm3 |
0.0939-0.1011 lb/in3 |
| Melting point |
546°C |
1015°F |
Mechanical Properties
The mechanical properties of Aluminium / Aluminum 7475 alloy are
displayed in the following table.
| Properties |
Metric |
Imperial |
| Elastic modulus |
70-80 GPa |
10152-11603 ksi |
| Poisson's ratio |
0.33 |
0.33 |
Thermal Properties
The thermal properties of Aluminium / Aluminum 7475 alloy are given
in the following table.
| Properties |
Conditions |
| T
(ºC) |
Treatment |
| Thermal conductivity |
177 (W/m-K) |
25 |
O |
Fabrication and Heat Treatment
Cold Working
Conventional methods are used to readily cold work Aluminium /
Aluminum 7475 alloy in the annealed condition.
Welding
Aluminium / Aluminum 7475 alloy is not usually welded.
Forming
Aluminium / Aluminum 7475 alloy can be formed using conventional
methods. This alloy can be easily formed in the annealed condition than
in the heat treated condition in which the alloy has more spring back
because of its strength.
Machinability
Aluminium / Aluminum 7475 alloy has good machining characteristics
in the annealed condition. Oil base lubricants can be used during the
machining operations of this alloy.
Heat Treatment
Aluminium / Aluminum 7475 alloy can be heat treated.
Applications
Aluminium / Aluminum 7475 alloy can be used in shell casings,
aircrafts, and many other structures.