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SAE AMS5621 Revision G, July 1, 2015
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Steel, Corrosion Resistant, Bars, Wire, and Forgings 13Cr (0.30-0.40C) (51420) Annealed
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AIA/NAS Aerospace Standards

This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, and forging stock.


These products have been used typically for parts requiring corrosion resistance and oxidation resistance up to 800 °F (427 °C) and hardness at room temperature within the range 40 to 55 HRC when heat treated, but usage is not limited to such applications.

Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking; ARP1110 recommends practices to minimize such conditions.