Historical
SAE AMS 6493-2009 (SAE AMS6493-2009)
Steel Bars, Forgings, and Tubing 1.0Cr 3.25Ni 0.40Mo (0.17 - 0.22C) Premium Aircraft-Quality Electroslag Remelted or Consumable Electrode Vacuum Remelted
This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. These products have been used typically for carburized 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]