Alloy systems (Topic: 10000)
The various wrought alloys can most readily be described by adopting two basic
groups. The groups being non heat-treatable and heat-treatable alloys.
The
European Standard EN (former the Aluminum Association system, AA) alloy designation system for wrought alloys begins with EN AW- followed by a
four digit number system, where the first of the four digits in the
designation indicates the alloy group as follows:
Non heat-treatable alloys
EN AW-1000 Pure Aluminium (min. 99,00% Al)
EN AW-3000 Aluminium-Manganese alloys (AlMn)
EN AW-4000 Aluminium-Silicon alloys (AlSi)
EN AW-5000 Aluminium-Magnesium alloys (AlMg)
Heat-treatable alloys
EN AW-2000 Aluminium -Copper alloys (AlCu)
EN AW-6000 Aluminium-Magnesium-Silicon alloys (AlMgSi )
EN AW-7000 Aluminium-Zinc-Magnesium alloys (AlZnMg)
The three following digits (denoted with a 0 here) defines the alloy. You can
even find 8000-alloys, but they are on an experimental basis and are often not
for commercial sale.
AW means: A for Aluminium and W for Wrought alloys. Another designation
systems defines the alloy system for castings, AC.