Stainless steel: Steel that does not rust

Stainless steel has been used for tableware and building surfaces since the war. The stainless steel industry has entered a dynamic exploration stage since the 1920s. Especially after the end of World War II, the development of the stainless steel industry was more rapid. Before the beginning of the First World War, there was little A large amount of stainless steel tableware is produced in Sheffield, England. At the same time, at the Firh-Sterling Steel Company in Pittsburgh, the first furnace of stainless steel began to be refined. Firh- Sterling Steel is headquartered in Sheffield County and belongs to Thomas Firth and his sons.

During the decade from 1910 to 1920, stainless steel production did not increase much, because almost all steel was used in the exhaust valves of aircraft engines in the United States and Britain. During World War I, the main stainless steel supplier was Carpenter Steel, whose products had patented technology for aircraft engines.

The general production process at this stage is to use heat-treated martensitic steel (13% chromium and 03% carbon). Almost all of the martensitic stainless steel smelting at this stage used the smelting process that Elwood Haynes and Harry Brearley applied for in the United States in March 1915. In order to avoid patent disputes in the law, Brearley, Thomas, and Thomas' sons established a stainless steel union holding all patents. Haynes agreed to hold 30% of the company’s shares, Brearley and Firth hold 40%

Several other US companies hold the remaining 30% of the shares. Although the German Krupp Steel Company holds the patent for austenite, the stainless steel joint organization has solved the key problem between ferrite and martensite in stainless steel. The United States introduced austenite in 1928 by paying patent fees. Integrated production technology and put it into use.

After the end of the First World War, the initial application of stainless steel was for stainless steel tableware. By 1923, the use of stainless steel had been expanded to medical and surgical equipment, dental equipment, and acid and alkali containers. New demands in the past decade include milk processing equipment, medical and surgical equipment, tableware, golf clubs and car interiors. Perhaps the most spectacular sight is the newly constructed curtain wall of the top seven floors of the Chrysler Building, including the huge drop-shaped design as its trademark. This building uses 48t austenitic stainless steel from the 53,000 stainless steel produced in 1929. The stainless steel industry gradually began to develop with the rise of new austenitic stainless steel producers (eg xn Allegheny ludlum. Carpenter Crucible, Lukens, Latrobe and several other early stainless steel producers).