Magnesium alloys standard ASTM alloy designation

As an example of a specific magnesium alloy code we may mention the alloy designated by AZ91E-T6. It contains A1 and Zn as principal alloying components. The 

The ASTM designation code of the Mg alloys consists of a string of characters composed by four subsequent parts having the following meanings  

Consists of two code letters representing the two main alloying elements arranged in order of decreasing percentage according to the following symbols  

A aluminium B bismuth C copper D cadmium E rare earth F iron G magnesium  

H thorium K zirconium L lithium M manganese N nickel P lead Q silver R chromium S silicon T tin W yttrium Y antimony Z zinc Second part 

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Table 5.60. Magnesium alloys standard ASTM system of alloy (and temper) designation. An example of commercial alloy coding system.

Notice however that for several common metal alloys (Mg, Al, Fe, etc.) special designation codes are used. As an example of the standard ASTM designation system, the codes used for the commercial magnesium alloys are shown in 5.12.4.5. 

Table 4.23. Standard ASTM designations of magnesium alloys First letters Second code Third code...

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