Plasteel

Grunting, he heaved to his feet and looked out the lucilite port at the surface of Saturn. Cold and rugged it was, lashed by furious gales that tore with futile fury at the plasteel dome which Elmer Dunk called home.

The passage, two paces deep, opened through a heavy door into a square office lighted by golden glowglobes. Jessica passed her hand across the door as she entered, was startled to identify plasteel.