what do the third and fourth numbers in the numbering classification system for wrought aluminum alloys or…

what do the third and fourth numbers in the numbering classification system for wrought aluminum alloys or the second and third numbers for cast aluminum tell you?\nthe principal alloying element used or the alloy series\nan alloy modification\nan arbitrary number that identifies a specific alloy in a series

what do the third and fourth numbers in the numbering classification system for wrought aluminum alloys or the second and third numbers for cast aluminum tell you?\nthe principal alloying element used or the alloy series\nan alloy modification\nan arbitrary number that identifies a specific alloy in a series

Answer

Brief Explanations:

In the numbering classification system for wrought aluminum alloys, the third and fourth numbers, and for cast aluminum, the second and third numbers identify an alloy modification. The principal alloying element is indicated by the first digit in wrought alloys and first two digits in cast alloys. The arbitrary number for specific alloy identification is not what these digits represent.

Answer:

An alloy modification