2014 aluminium alloy is an aluminium-based alloy often used in the aerospace industry.
It is easily machined in certain tempers, and among the strongest available aluminium alloys, as well as having high hardness. However, it is difficult to weld, as it is subject to cracking.
2014 is the second most popular of the 2000-series aluminum alloys, after 2024 aluminum alloy. It is commonly extruded and forged. The corrosion resistance of this alloy is particularly poor. To combat this, it is often clad with pure aluminum. If unclad 2014 aluminum is to be exposed to the elements, it should be painted as a corrosion protection measure.
Prior to the adoption of The Aluminum Association alloy designations in 1954, 2014 was known by the industry conventional designation "14S".
Principal Design Features:Â Â Â Â Â Â
This is a precipitation hardening alloy with good strength after heat treatment.
Applications:Â Â Â Â Â Â
Commonly used in the manufacture of aircraft structures, and truck frames.
Machinability is good in the annealed condition, somewhat more difficult in the heat treated conditions. For lathe cutting use 15 degree top rake, 20 degree side rake and 10 degree clearance. Use of a lubricant, such as oil or kerosene, is recommended for all machining.
Forming:Â Â Â
The alloy may be formed by conventional means. However tight bend radius should be avoided and forming is best done in the T4 or T3 temper.
Welding:Â Â Â
Welding should be done by inert gas consumable electrode arc method for best results. The alloy is subject to cracking during welding so fixturing should be arranged for minimum strain. Use either 2014 or 2017 alloy filler rod.
Heat at 935 F for sufficient time for thorough heating of part then water quench. This produces T4 temper. Various tempers are derived after this heat treatment by subsequent cold work.
Hot working is accomplished in the range of 300 to 400 F.
Hardening is accomplished by a precipitation heat treatment at 935 F followed by water quench. This produces T4 temper. Other tempers (mechanical properties) result from additional cold work after this treatment and then by a 320 F heat treatment for T6510 and T6511 tempers.
Anneal at 775 F for 2 to 3 hours followed by controlled cooling at 50 F per hour down to 500 F. Then air cool.
Other Mechanical Props:Â Â Â Â Â Â
Shear strength: O (annealed) temper 18 ksi, T4 temper 38 ksi, T6 temper 42 ksi
The aluminum industry has created aÂ system using aÂ four-digit numerical designation to identify wrought aluminum alloys.Â Â The first digit indicates the major alloying element.Â Â The second digit indicates whether there was aÂ modification in the basic alloy.Â Â The third and fourth digit indicates the specific alloy.Â Â The following represent the various groups:
|1XXX||Aluminum 99% or greater|
|2XXX||Copper -Â major alloying element|
|3XXX||Manganese -Â major alloying element|
|5XXX||Magnesium -Â major alloying element|
|6XXX||Magnesium and silicon -Â major alloying elements|
|7XXX||Zinc -major alloying element|
3:Aluminum Plate/Coil Process:
4:Aluminum Alloy Coil Package:
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