Gateview Prison, which is made of concrete and stainless steel. Stainless steel was a steel alloy with about 10.5 percent of chromium in its' mass. Gateview Prison was constructed with concrete and stainless steel. References ↑ As seen in the Superfriends season one episode The Menace of the White Dwarf (1973). ↑ As seen in The Menace of the White Dwarf. External Link Stainless steel at Wikipedia Retrieved from "https://superfriends.fandom.com/wiki/Stainless_steel?oldid=74567" Categories: Elements Community content is available under CC-BY-SA unless otherwise noted.