Sep 26 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forming
Welding
Heat Treatment
Cold Working
Annealing
Hardening
Introduction
Aluminium / Aluminum alloys are known for their strong
corrosion resistance. They are sensitive to high temperatures in the
range of 200 to 250°C (392 to 482°F). High temperatures tend to reduce
these alloys’ strength. However, the strength of the aluminum alloys
can be increased at subzero temperatures, making them good
low-temperature alloys.
The following datasheet provides details about Aluminium
/ Aluminum 1145 alloy.
Chemical Composition
The following table shows the chemical composition of Aluminium /
Aluminum 1145 alloy.
| Element |
Content
(%) |
| Aluminum, Al |
99.45 (min) |
Copper, Cu
|
0.05
|
Manganese, Mn
|
0.05
|
Magnesium, Mg
|
0.05
|
Zinc, Zn
|
0.05
|
Titanium, Ti
|
0.03
|
Silicon, Si +
Iron, Fe
|
Remainder
|
Physical Properties
The physical properties of the aluminum 1145 alloy are outlined in
the following table.
| Properties |
Metric |
Imperial |
| Density |
2.6-2.8 g/cm3 |
0.0939-0.1011 lb/in3 |
Mechanical Properties
The mechanical properties of the aluminum 1145 alloy are tabulated
below.
| 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 1145 alloy are
tabulated below.
| Properties |
Conditions |
| T
(ºC) |
Treatment |
| Thermal conductivity |
227 W/mK |
25 |
H18 |
Other Designations
Equivalent materials to the Aluminium / Aluminum 1145 alloy are as
follows:
- AMS 4011
- ASTM B373
- ASTM B479
- QQ A-1876
Fabrication and Heat Treatment
Machinability
Aluminium / Aluminum 1145 alloy is a difficult alloy to machine. It
is slightly easier to machine in the H16, 18 or 19 tempers than in the
softer or annealed temper form.
Forming
Aluminium / Aluminum 1145 alloy has excellent forming quality and
can be easily formed using all the conventional forming methods.
Welding
Weldability of the Aluminium / Aluminum 1145 alloy is excellent when
commercial methods such as TIG or MIG welding are used.
Heat Treatment
Aluminium / Aluminum 1145 alloy is a non-heat treatable alloy that
can be hardened by cold working.
Cold Working
Aluminium / Aluminum 1145 alloy is extremely easy to cold work in
the softer tempers such as annealed, H12, 14, 16 tempers. It is a lot
more difficult with harder tempers but it is still possible.
Annealing
Annealing can be performed at 343°C (650°F) for a suitable amount of
time and then air cooled.
Hardening
Aluminium / Aluminum 1145 alloy can be hardened by cold working only.