Multiple choice Which of the following is not an alloy of aluminium? Duralumin Megallium Magnalium Nambe Reveal answer Fill a bubble to check yourself B Correct answer Explanation Megallium is an alloy of 60% cobalt, 20% chromium, 5% molybdenum, and traces of other substances. It is used in dentistry because of its light weight, resistance to corrosion and hypo-allergenic (nickel free) properties.