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).
Weathering steel
In 1933 the United States Steel Corporation developed and patented a steel with exceptional mechanical resistance, primarily for use in railway hopper cars, for the handling of heavy bulk loads of coal, metal ores, other mineral products and grain. The controlled corrosion, for which this material is now best known, was a welcome by-product discovered soon after, prompting USS to apply the trademarked name Cor-Ten. Because of its inherent toughness, weathering steel is still used extensively for containers.