Yorkshire and the Humber
Stainless steel was invented in 1913 by Harry Brearley of Sheffield, working for Firth Brown Steels (now called Sheffield Forgemasters). SAE 304 stainless steel is the most common stainless steel today, invented by Dr William Herbert Hatfield FRS in 1924 at Firth-Vickers known as Staybrite 18/8, a chromium-nickel steel. Many Swiss watches were mostly made out of Staybrite.
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.