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aluminum alloy sheet sizes
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aluminum alloy sheet sizesDESIGNATIONS
Alloy Designation System for Wrought Sheet Products
aluminum alloy sheet sizes products are
identified by a four-digit numerical system which is administered by the
Aluminum Association. The alloys are conveniently divided into
eight groups based on their principal alloying element. The first digit
identifies the alloy group as follows:
|
ALLOY GROUP |
PRINCIPAL ALLOYING ELEMENT |
|
|
1xxx |
Unalloyed Aluminum |
Purity of 99.0% or Greater |
|
2xxx |
Copper |
Heat Treatable Alloys |
|
3xxx |
Manganese |
|
|
4xxx |
Silicon |
Low Melting Point Alloys |
|
5xxx |
Magnesium |
|
|
6xxx |
Magnesium and Silicon |
Heat Treatable Alloys |
|
7xxx |
Zinc |
Heat Treatable Alloys |
|
8xxx |
Other Elements |
|
The last two digits in the 1xxx group correspond with the two digits after the
decimal which indicate the minimum aluminum content. For example the aluminum
content of 1060 is 99.60% minimum, 1100 is 99.00% minimum,
1350 is 99.50% minimum and so on.
The last two digits of the other groups are sequential numbers issued by
the Aluminum Association to ensure each alloy is uniquely identified.
The second digit in all the groups indicates a minor modification of the
basic alloy. For instance, 5252 is the second modification of 5052 alloy.
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