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User:Contributor1972/sandbox/Draft:Nitronic

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History

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Nitronic is a collection of nitrogen strengthened stainless steels developed by Armco. The trademark is now owned by AK Steel since 2000 [1]. 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[2].

Uses today

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Nitronic 30 is used to lighten transportation vehicles [3]. 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 [4]. Nitronic 50 is used in marine environments including boat shafting and solid rod rigging. [5].

Composition

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

NITRONIC Element (% by mass)
Fe Cr Ni Mo Nb Mn Si C S P V N
30

[6]

Bal 15.0-17.0 1.5-3.0 7.0-9.0 1 max 0.03 max 0.03 max 0.04 max 0.15-0.3
32

[7]

Bal 16.5-19.0 0.5-2.5 11.0-14.0 1 max 0.15 max 0.045 max 0.2-0.45
33

[8]

Bal 17.0-19.0 2.3-3.7 11.5-14.5 0.75 max 0.08 max 0.01 max 0.06 max 0.2-0.4
40

[9]

Bal 19-21.5 5.5-7.5 8.0-10.0 1 max 0.04 max 0.01 max 0.04 max 0.2-0.4
50

[10]

Bal 20.5-23.5 11.5-13.5 1.5-3.0 0.01-0.03 4.0-6.0 0.2-0.6 0.03 max 0.01 max 0.04 max 0.1-0.03 0.2-0.4
60

[11]

Bal 16-17 8.0-8.5 0.75 max 0.10 max 7.5-8.5 3.7-4.2 0.06-0.08 0.03 max 0.040 max 0.2 max 0.1-0.18

References

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  1. ^ AK Steel GB (2011–2017). "About us". p. 1. Retrieved March 17, 2017.{{cite web}}: CS1 maint: date format (link)
  2. ^ Dynamic Behavior of Materials, Volume 1: Dynamic Characterization of Nitronic 30, 40 and 50 Series Stainless Steels. 2016. p. 22. ISBN 978-3319411323. Retrieved March 19, 2017. {{cite book}}: Unknown parameter |authors= ignored (help)
  3. ^ Bruce Emmons (June 27, 2016). "Ultralight Electric Bus". p. 1. Retrieved March 19, 2017.
  4. ^ Harold M. Cobb (2010). The History of Stainless Steel. p. 305. ISBN 9781615030118. Retrieved March 19, 2017.
  5. ^ Dan Spurr (Jan–Apr 1982). "Cruising World". p. 68. Retrieved March 19, 2017. {{cite magazine}}: Cite magazine requires |magazine= (help)CS1 maint: date format (link)
  6. ^ AK Steel. "Nitronic 30 Stainless Steel" (PDF). Retrieved March 19, 2017.
  7. ^ Electralloy. "Nitronic 32 Stainless Steel" (PDF). Retrieved March 19, 2017.
  8. ^ Electralloy. "Nitronic 33 Stainless Steel" (PDF). Retrieved March 19, 2017.
  9. ^ Electralloy. "Nitronic 40 Stainless Steel" (PDF). Retrieved March 19, 2017.
  10. ^ Electralloy. "Nitronic 50 Stainless Steel" (PDF). Retrieved March 19, 2017.
  11. ^ Electralloy. "Nitronic 60 Stainless Steel" (PDF). Retrieved March 19, 2017.


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