19 12 stainless steel was discovered. Scientific exploration is a hard and boring job, but it is also full of interest and contingency. It is said that stainless steel was invented by Breier, a metallurgical expert, and was a by-product of the development of gun bore steel and metal materials. 19 15, Brier's stainless steel discovery was patented in the United States; 19 16 This achievement was granted a British patent.