The Metal Men
The Metal Men are robotic creations of Dr. Will Magnus and are each willing to sacrifice their very "life" for the success of a mission (first appearance, Showcase No. 37, Mar/Apr 1962: "The Flaming Doom!"). As metallic cyborgs, they are often destroyed and re-built during the course of their careers.
Dubbed Iron, Lead, Mercury, Tin, Platinum, and Gold - the Metal Men once ally with the mighty team of Superman and Batman when a destructive laser ray threatens the United States (WF No. 239, Jul 1976: "The UFO That Stole the USA!").