Good question, but assuming that by “SS” you’re referring to stainless steel, it too is an alloy—as are all steels.
When aluminum first became common as the primary metal in certain pistol frames, it was obviously thought that that would seem cheap and flimsy to the ignorant, so gun magazine article writers evidently decided to call it “alloy” even though that word refers to any mixture of metal and other substances.
“Most men … can seldom accept the simplest and most obvious truth if it … would oblige them to admit the falsity of conclusions … which they have woven, thread by thread, into the fabrics of their lives.” — Leo Tolstoy
Posts: 50166 | Location: 10,160 Feet Above Sea Level in Commirado | Registered: April 04, 2002