Historical
SAE AMS 6498-2009 (SAE AMS6498-2009)
Steel Bars, Forgings, and tubing, Nitriding 1.4Cr 1.2Mo 0.3V (0.29 - 0.36C) Premium Aircraft-Quality for Bearing Applications Double Vacuum Melted
This specification covers a nitriding grade of premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. These products have been used typically for nitrided parts requiring high minimum core hardness with a narrow range, reduced distortion and subject to stringent magnetic particle inspection standards, but usage is not limited to such applications.
Society of Automotive Engineers [sae]