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Nitronic 40 UNS Uncategorized

Nitronic 40 UNS

Posted on February 10, 2022February 19, 2022 By davidkirchnerwp

Nitronic 40 Stainless Steel is a nitrogen strengthened austenitic stainless steel with great versatility, combining high yield strength with good corrosion resistance.  AMS 5656, ASTM A276, ASTM A479/A479M, ASTM A484/484M are the applicable specs. There are two different version of Nitronic 40: UNS S21904 (XM11) and UNS S21900 (XM10). The difference between the two UNS…

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Passivation for corrosion protection.

Posted on February 8, 2022February 19, 2022 By davidkirchnerwp

Stainless is protected primarily by chromium oxide, a transparent oxide film that prevents further reaction with oxygen like rust.  When machining stainless, if an iron particle gets embedded, the stainless now has a place where there is no oxide film for protection and corrosion starts.  It is common that when machining fasteners they are cleaned…

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