Sep 20 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Cold Working
Forging
Forming
Machinability
Heat Treatment
Hot Working
Hardening
Aging
Applications
Introduction
Aluminium / Aluminum alloys are good low-temperature alloys with
strong corrosion resistance characteristics and high electrical
conductivity. These alloys are sensitive to high temperatures ranging
between 200 and 250°C (392 and 482°F). Aluminium / Aluminum alloys gain
strength when exposed to subzero temperatures and their strength is
lost when these alloys are exposed to high temperatures.
The following datasheet provides an overview of Aluminium / Aluminum
7175 alloy.
Chemical Composition
The chemical composition of Aluminium / Aluminum 7175 alloy is
outlined in the following table.
| Element |
Content
(%) |
| Aluminium / Aluminum, Al |
90.0 |
| Zinc, Zn |
5.6 |
| Magnesium, Mg |
2.5 |
| Copper, Cu |
1.6 |
| Chromium, Cr |
0.23 |
Physical Properties
The following table shows the physical properties of Aluminium /
Aluminum 7175 alloy.
| Properties |
Metric |
Imperial |
| Density |
2.6-2.8 g/cm3 |
0.0939-0.1011 lb/in3 |
| Melting point |
482°C |
900°F |
Mechanical Properties
The mechanical properties of the Aluminium / Aluminum 7175 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 7175 alloy are given
in the following table.
| Properties |
Conditions |
| T
(ºC) |
Treatment |
| Thermal conductivity |
177 (W/mK) |
25 |
O |
Fabrication and Heat Treatment
Cold Working
Conventional methods are used for cold working Aluminium / Aluminum
7175 alloy allowing generous bend radii as with 7075 alloy.
Forging
Aluminium / Aluminum 7175 alloy can be forged.
Forming
Aluminium / Aluminum 7175 alloy is formed by hand or die forging as
it is a forging alloy.
Machinability
Aluminium / Aluminum 7175 alloy is machinable.
Heat Treatment
Aluminium / Aluminum 7175 alloy is capable of being heat treated.
Hot Working
Hot working, as with forging, is suitable for the Aluminium /
Aluminum 7175 alloy.
Hardening
Aluminium / Aluminum 7175 alloy can be hardened by cold working or
heat treatment.
Aging
Aluminium / Aluminum 7175 alloy is an age hardenable alloy.
Applications
Aluminium / Aluminum 7175 alloy can be used in machined fittings of
the aircraft industry.