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440C (UNS designation S44004) is a martensitic 400 series stainless steel, [1] and has the highest carbon content of the 400 stainless steel series. It can be heat treated to reach hardness of 58 to 60 HRC. It can be used to make rolling contact stainless bearings, e.g. ball bearings and roller bearings. It is also used to make knife blades.
[7] 420A (420J1) and 420B (420J2) are economical, highly corrosion-resistant stainless steel grades. Knife manufacturers use this material in budget knives, also in diving knives due to its high corrosion resistance. [7] 440 series has three types: 440A, 440B, and 440C. 440A is a relatively low-cost, highly corrosion-resistant stainless steel.
The Fahys Watch Case Co Factory in Sag Harbor 1878. The founder of the company, Joseph Fahys, was born on May 28, 1832, in Belfort, France. [3] In 1848, Fahys emigrated from France to the United States with his mother. He was apprenticed to Ulysses Savoye, of West Hoboken, New Jersey, who was one of the two first watch case makers in the United ...
Martensitic stainless steels can be high- or low-carbon steels built around the composition of iron, 12% up to 17% chromium, carbon from 0.10% (Type 410) up to 1.2% (Type 440C): [8] The chromium and carbon contents are balanced to have a martensitic structure.
This list is a duplicate of Category:Watch brands, which will likely be more up-to-date and complete. Manufacturers that are named after the founder are sorted by surname. Manufacturers that are named after the founder are sorted by surname.
A Patek Philippe pocket watch. This list of most expensive watches sold at auction documents the watches sold at auction worldwide for at least 1.5 million US dollars.The final price listed is the total price paid by the buyer converted to US dollars, according to the currency exchange rate at the time of auction.