Date: Summer 2010
How is malleability measured?
Malleability, which is the ability of a substance (usually a metal) to be
deformed under compressive stress without cracking or fracturing, is
generally not directly measured. A malleable metal, for example, will be
capable of being rolled, hammered, or otherwise flattened into thin sheets.
Gold, which is the most malleable metal, is capable of being rolled or
hammered into sheets only a relatively few atoms thick. Other metals have
lesser degrees of malleability
Because there is no definitive way to directly measure malleability, this
property is generally rated by comparing the malleability of a metal or other
substance with that of other known metals.
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Update: June 2012