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).
Henry Chisholm
Unlike fellow Scottish American immigrant and steel magnate Andrew Carnegie, whose career and Chisholm's mirrored one another, Henry Chisholm focused on eliminating waste in iron and steel manufacturing rather than lowering the cost of production. Chisholm pioneered the reuse of scrap in steel production. His plants were the first to successfully roll rods and wire from steel, and in 1871 his plants produced the first steel screws.