Physics:Nivaflex
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Short description: Cobalt alloy used in watchmaking
Nivaflex is an octavariant alloy important in watchmaking, used primarily for the mainspring.[1] The name was registered as a trademark in 1957 by Reinhard Straumann, a Switzerland metallurgist.[2][3] Nivaflex is "wholly non-magnetic" and displays a very low coefficient of thermal expansion.[4] Its composition is of 45% cobalt, 21% nickel, 18% chromium, 5% iron, 4% tungsten, 4% molybdenum, 1% titanium and 0.2% beryllium; carbon content is less than 0.1 percent of the alloy's weight.[5]
References
- ↑ Brunner, Gisbert (18 April 2015). "Throwing A Curve: The How, What, When, Where and Why Of Mainsprings". Watchtime. Ebner Publishing International. https://www.watchtime.com/blog/throwing-a-curve-the-how-what-when-where-and-why-of-mainsprings/.
- ↑ Müller, Reto (29 June 2012). "Reinhard Straumann". Historischen Lexikons der Schweiz. https://hls-dhs-dss.ch/de/articles/016400/2012-06-29/.
- ↑ "Nivaflex - 132272". ipaustralia.com.au. 24 August 2012. http://www.ipaustralia.com.au/applicant/institut-dr-ing-reinhard-straumann-ag/trademarks/132272/.
- ↑ "Nivaflex 45/5 Wire". Jacques Allemann SA. https://www.jacques-allemann.com/media/wysiwyg/PDF/JAS/werkstoffe/Nivaflex_45_5_EN.pdf.
- ↑ Forster, Jack (6 January 2020). "In-Depth Consider The Mainspring". Hodinkee Inc. https://www.hodinkee.com/articles/consider-the-mainspring.
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