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.
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.