Harry Brearley
Harry Brearley (18 February 1871 – 14 July 1948) was an English metallurgist, usually credited with the invention of "rustless steel" (later to be called "stainless steel" in the anglophone world).
Alexander Lyman Holley
Alexander Lyman Holley (Lakeville, Connecticut, July 20, 1832 - Brooklyn, New York, January 29, 1882) was an American mechanical engineer, inventor, and founding member of the American Society of Mechanical Engineers (ASME). He was considered the foremost steel and plant engineer and designer of his time, especially in regard to applying research to modern steel manufacturing processes.