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In the designation of wrought Al alloys, eg. 3m, what does the first digit-3- refer to? A. The main alloying element B. Carbon percentage of the alloy C. Whether it is an ingot or a billet D. Specific alloy heat treatment

User Securisec
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The first digit in the designation for wrought Al is the principal alloying element.

The answer is A.

User Theotheo
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