So this answer mentions a material called "Supermanium", which is apparently the substance used to craft Superman's Supermobile aircraft.
a metal so strong that "only Superman's heat vision can soften the substance, and only his super-strength is mighty enough to mold it!" (Action Comics #481, DC Comics, March 1978, pg 13.)
Now, anyone with a half-decent high-school science education will tell you that in the real world, heat is just heat. There aren't different types of heat, and you can't really easily imagine a material that only yield to "certain types of heat". It might be extremely heat-resistant -- say up to thousands of degrees -- but if that were the case then you would superheat the surrounding atmosphere and that would be very bad. (I don't know, maybe that is the case, and Superman works the metal in space?)