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.
Chrysler Building
The Chrysler Building uses bright "Nirosta" stainless steel extensively in its design, an austenitic alloy developed in Germany by Krupp (a German acronym for "nichtrostender Stahl", meaning "non-rusting steel"). It was the first use of this "18-8 stainless steel" in an American project, composed of 18% chromium and 8% nickel. Nirosta was used in the exterior ornaments, the window frames, the crown, and the needle. The steel was an integral part of Van Alen's design, as E.E. Thum explains: "The use of permanently bright metal was of greatest aid in the carrying of rising lines and the diminishing circular forms in the roof treatment, so as to accentuate the gradual upward swing until it literally dissolves into the sky..." Stainless steel producers used the Chrysler Building to evaluate the durability of the product in architecture. In 1929, the American Society for Testing Materials created an inspection committee to study its performance, which regarded the Chrysler Building as the best location to do so; a subcommittee examined the building's panels every five years until 1960, when the inspections were canceled because the panels had shown minimal deterioration.