A team of engineers from several California colleges has developed and tested a type of steel with a record-breaking ability to withstand impacts without permanent deformation. The new alloy, named SAM2X5-630, could be used in applications from drills to body armor to meteor-resistant casings for satellites. The material is an amorphous steel alloy, a subclass of steel alloys made of arrangements of atoms that deviate from steel’s classical crystal-like structure, where iron atoms occupy specific locations.