What the meaning "AA VWXY" in aluminium alloy?, ASTM standard?

Question

what the meaning of "AA VWXY" in aluminium alloy.

For example, AA 5059.

mean V=5? W=0? X=5? Y=9?

Answer 1

AA = Aluminium Alloy.

The numbers represent the parts of other materials, the first number is is the primary alloy.

None (99%+ Aluminium) 1XXX

Copper 2XXX

Manganese 3XXX

Silicon 4XXX

Magnesium 5XXX

Magnesium + Silicon 6XXX

Zinc 7XXX

Lithium 8XXX

For unalloyed wrought aluminium alloys designated 1XXX, the last two digits represent the purity of the metal. They are the equivalent to the last two digits after the decimal point when aluminium purity is expressed to the nearest 0.01 percent. The second digit indicates modifications in impurity limits. If the second digit is zero, it indicates unalloyed aluminium having natural impurity limits and 1 through 9,

indicate individual impurities or alloying elements.

For the 2XXX to 8XXX groups, the last two digits identify different aluminium alloys in the group. The second digit indicates alloy modifications. A second digit of zero indicates the original alloy and integers 1 to 9 indicate consecutive alloy modifications.