Fig. 4: Radar charts for four criticality risk variables for 69 elements: use in alloy forms, U.S. import dependency, losses to nonfunctional recycling and final disposal, and companionality.
From: Alloy information helps prioritize material criticality lists
a Elements not designated as critical by any country (six elements), (b) elements designated as critical by the United States only (one element), (c) elements designated as critical by other countries but not the United States (nine elements), and (d) elements designated as critical by the United States and one or more other countries (53 elements).
