BS ISO 3116:2019 pdf free.Magnesium and magnesium alloys一Wrought magnesium and magnesium alloys. The designation for alloys shall consist of a prefix character "M", which represents magnesium, and not more than three capital letters representing the alloying elements specified in the greatest amount, arranged in order of decreasing percentages, or in alphabetical order if of equal percentages, followed by the respective...