Nitronic - Nitronic Stainless Steel

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Nitronic is the trade name for a collection of nitrogen strengthened stainless steel alloys. They are austenitic stainless steels.


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History

Nitronic alloys were developed by Armco Steel. The first of these alloys, Nitronic 40, was introduced in 1961. Since 2000, the trademark has been owned by AK Steel, successor to Armco Steel. Electralloy is the licensed producer in North America for a wide range of Nitronic products.

The Nitronic name is due to the addition of nitrogen to the alloy, which enhances the strength internally rather than being nitrided on the surface as some steel are treated. The nitrogen is homogenous throughout the material. Nitronic materials have about twice the yield strength of 304L and 316L.


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Uses today

Nitronic 30 is used to lighten transportation vehicles. Buses and railcars benefit from the high strength to weight ratio for energy savings, meaning less steel used for the application. Nitronic 40 is used in the aerospace industry as hydraulic tubing. Nitronic 40 has unusually good performance characteristics at ultralow temperatures, which offers a "design advantage" over comparable alloys. Nitronic 50 is used in marine environments including boat shafting and solid rod rigging. Nitronic 60 and a similar alloy Gall-Tough "were specifically developed to have superior resistance to galling and metal to metal wear". Galling is a form of wear caused by adhesion between sliding surfaces.


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Composition

Nitronic alloys have widely varying compositions, but all are predominantly iron, chromium, manganese and nitrogen.

Source of the article : Wikipedia



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