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Reference


Aluminium Alloy Information



Wrought Aluminum Alloys

The International Alloy Designation System is the most widely accepted naming scheme for wrought alloys. Each alloy is given a four digit number, where the first digit indicates the major alloying elements.

  • 1000 series are essenitally pure aluminium with a minimum 99% aluminium content by weight and can be work hardened
  • 2000 series are alloyed with copper, can be precipitation hardened to strengths comparable to steel. Formerly referred to as duralumin, they were once the most common aerospace alloys, but were susceptible to stress corrosion cracking and are increasingly replaced by 7000 series in new designs.
  • 3000 series are alloyed with manganese, and can be work hardened
  • 4000 series are alloyed with silicon. They are also known as silumin
  • 5000 series are alloyed with magnesium, derive most of their strength from solution hardening, and can also be work hardened to strengths comparable to steel
  • 6000 series are alloyed with magnesium and silicon, are easy to machine, and can be precipitation hardened, but not to the high strengths that 2000, 5000 and 7000 can reach.
  • 7000 series are alloyed with zinc, and can be precipitation hardened to the highest strengths of any aluminium alloy.
  • 8000 series are a miscellaneous category

Wrought Aluminium Alloy Composition Limits (% weight)

Alloy Si Fe Cu Mn Mg Cr Zn V Ti Bi Ga Pb Zr Other Al
each total
1060 0.25 0.35 0.05 0.03 0.03 0.03 0.05 0.05 0.03 0.03 0.03 0.03 0.03 0.03 99.6 min
1100 0.95 Si+Fe 0.05-0.20 0.05 0.10 0.05 0.15 99.0 min
2014 0.50-1.2 0.7 3.9-5.0 0.40-1.2 0.20-0.8 0.10 0.25 0.15 0.05 0.15 remainder
2024 0.50 0.50 3.8-4.9 0.30-0.9 1.2-1.8 0.10 0.25 0.15 0.05 0.15 remainder
2219 0.2 0.30 5.8-6.8 0.20-0.40 0.02 0.10 0.05-0.15 0.02-0.10 0.10-0.25 0.05 0.15 remainder
3003 0.6 0.7 0.05-0.20 1.0-1.5 0.10 0.05 0.15 remainder
3004 0.30 0.7 0.25 1.0-1.5 0.8-1.3 0.25 0.05 0.15 remainder
3102 0.40 0.7 0.10 0.05-0.40 0.30 0.10 0.05 0.15 remainder
5052 0.25 0.40 0.10 0.10 2.2-2.8 0.15-0.35 0.10 0.05 0.15 remainder
5083 0.40 0.40 0.10 0.40-1.0 4.0-4.9 0.05-0.25 0.25 0.15 0.05 0.15 remainder
5086 0.40 0.50 0.10 0.20-0.7 3.5-4.5 0.05-0.25 0.25 0.15 0.05 0.15 remainder
5154 0.25 0.40 0.10 0.10 3.1-3.9 0.15-0.35 0.20 0.20 0.05 0.15 remainder
5454 0.25 0.40 0.10 0.50-1.0 2.4-3.0 0.05-0.20 0.25 0.20 0.05 0.15 remainder
5456 0.25 0.40 0.10 0.50-1.0 4.7-5.5 0.05-0.20 0.25 0.20 0.05 0.15 remainder
6005 0.6-0.9 0.35 0.10 0.10 0.40-0.6 0.10 0.10 0.10 0.05 0.15 remainder
6005A 0.50-0.9 0.35 0.30 0.50 0.40-0.7 0.30 0.20 0.10 0.05 0.15 remainder
6060 0.30-0.6 0.10-0.30 0.10 0.10 0.35-0.6 0.5 0.15 0.10 0.05 0.15 remainder
6061 0.40-0.8 0.7 0.15-0.40 0.15 0.8-1.2 0.04-0.35 0.25 0.15 0.05 0.15 remainder
6063 0.20-0.6 0.35 0.10 0.10 0.45-0.9 0.10 0.10 0.10 0.05 0.15 remainder
6066 0.9-1.8 0.50 0.7-1.2 0.6-1.1 0.8-1.4 0.40 0.25 0.20 0.05 0.15 remainder
6070 1.0-1.7 0.50 0.15-0.40 0.40-1.0 0.50-1.2 0.10 0.25 0.15 0.05 0.15 remainder
6105 0.6-1.0 0.35 0.10 0.10 0.45-0.8 0.10 0.10 0.10 0.05 0.15 remainder
6162 0.40-0.8 0.50 0.20 0.10 0.7-1.1 0.10 0.25 0.10 0.05 0.15 remainder
6262 0.40-0.8 0.7 0.15-0.40 0.15 0.8-1.2 0.04-0.14 0.25 0.15 0.40-0.7 0.40-0.7 0.05 0.15 remainder
6351 0.7-1.3 0.50 0.10 0.40-0.8 0.40-0.8 0.20 0.20 0.05 0.15 remainder
6463 0.20-0.6 0.15 0.20 0.05 0.45-0.9 0.05 0.05 0.15 remainder
7005 0.35 0.40 0.10 0.20-0.7 1.0-1.8 0.06-0.20 4.0-5.0 0.01-0.06 0.08-0.20 0.05 0.15 remainder
7072 0.7 Si+Fe 0.10 0.10 0.10 0.8-1.3 0.05 0.15 remainder
7075 0.40 0.50 1.2-2.0 0.30 2.1-2.9 0.18-0.28 5.1-6.1 0.20 0.05 0.15 remainder
7116 0.15 0.30 0.50-1.1 0.05 0.8-1.4 4.2-5.2 0.05 0.05 0.03 0.05 0.15 remainder
7129 0.15 0.30 0.50-0.9 0.10 1.3-2.0 0.10 4.2-5.2 0.05 0.05 0.03 0.05 0.15 remainder
7178 0.40 0.50 1.6-2.4 0.30 2.4-3.1 0.18-0.28 6.3-7.3 0.20 0.05 0.15 remainder

The "other" limits apply to all elements, whether a table column exists for them or not, for which no other limit is specified. alloy 6005A has another limit not shown above: the manganese plus chromium must be in the range of 0.12-0.50.

Cast Aluminum Alloys

The Aluminium Association (AA) has adopted a nomenclature similar to that of wrought alloys. British Standard and DIN have different designations. In the AA system, the second two digits reveal the minimum percentage of aluminium, e.g. 150.x correspond to a minimum of 99.50% aluminium. The digit after the decimal point takes a value of 0 or 1, denoting casting and ingot respectively. The main alloying elements in the AA system are as follows:

  • 1xx.x series are minimum 99% aluminium
  • 2xx.x series copper
  • 3xx.x series silicon, copper and/or magnesium
  • 4xx.x series silicon
  • 5xx.x series magnesium
  • 7xx.x series zinc
  • 8xx.x series tin
  • 9xx.x series miscellaneous

Named alloys

Overview of use

Common aerospace alloys

These are aluminium alloys which have a long history of being used in aircraft and other aerospace structures.

Other aerospace alloys

These are currently produced, but less widely used, aluminium alloys for aerospace applications.

Marine alloys

These alloys are used for boatbuilding and shipbuilding, and other marine and salt-water sensitive shore applications.


Source: Wikipedia article Aluminium Alloy


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