Aluminium square bar, manufactured in alloy 2017 T4, an alloy with high mechanical characteristics and excellent fatigue resistance. It has medium machinability and is suitable for structural components in aviation and defence.
Aluminium square bar, manufactured in alloy 2017 T4, an alloy with high mechanical characteristics and excellent fatigue resistance. It has medium machinability and is suitable for structural components in aviation and defence.
The 35×35 extruded aluminium square bar is made of EN AW 2017 alloy. An aluminium alloy belonging to the 2000 family, with copper as the main alloying element.
It is an alloy with high mechanical properties and excellent fatigue resistance. It forms long chips during machining, so it is not recommended for automatic processes. Similar to the EN AW 2024 alloy, which is more common in the American market.
This aluminium alloy has the following composition under standard EN 573-3:
|
|
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Zi |
Zr+Ti |
Others |
Al |
|
|
Indiv. |
Total |
||||||||||
|
min |
0.20 |
|
3.5 |
0.40 |
0.40 |
|
– |
|
|
|
|
|
max. |
0.80 |
0.70 |
4.5 |
1.00 |
1.00 |
0.10 |
0.25 |
0.25 |
0.05 |
0.15 |
Rest |
Bars manufactured from EN AW 2017 alloy are supplied in T3 or T4 treatment states depending on the extruded or calibrated quality of the alloy.
Its mechanical characteristics, in accordance with standards EN 745-2 and 755-2, are as follows:
|
Condition |
Main measurement mm |
Rm MPa |
Rp0.2 MPa |
A min. |
A50 mm min. |
HBW hardness* |
||
|
min. |
Max. |
min. |
Max. |
|||||
|
T3 |
≤ 80 |
400 |
– |
250 |
– |
10 |
8 |
105 |
|
Q4 |
≤ 25 |
380 |
– |
260 |
– |
12 |
10 |
105 |
|
25 < d ≤ 75 |
400 |
– |
270 |
– |
10 |
– |
105 |
|
|
75 < d ≤ 150 |
390 |
– |
260 |
– |
9 |
– |
105 |
|
|
150 < d ≤ 200 |
370 |
– |
240 |
– |
8 |
– |
105 |
|
|
200 < d ≤ 250 |
360 |
– |
220 |
– |
7 |
– |
105 |
|
*Reference value for informational purposes only.
The EN AW 2017 alloy has the following physical properties:
|
Elastic modulus |
Coefficient of expansion per °C (20°-100°C) |
Thermal conductivity |
Resistivity µW·cm(2) /cm |
|
|
W/mK |
Cal/cm·s·°C |
|||
|
70,600 MPa |
23 x 10-6 |
126 (T4) |
0.30 (T4) |
5.1 (T4) |
The general behaviour of the EN AW 2017 aluminium alloy is as follows in the areas listed below:
– Corrosion resistance: Low.
– Weldability: Low.
– Machinability: Good.
– Formability: Fair.
– Suitability for anodising: Low.
The classification is made in the following range: excellent, very good, good, fair and low.
The main applications of the EN AW 2017 alloy are as follows:
– Structural elements requiring high mechanical characteristics in sectors such as aeronautics, defence, or other types of equipment.
Fittings, fasteners or bolts where lightness plays an important role.