Historical
SAE AMS 6525D-2012 (SAE AMS6525D-2012)
Steel, Bars, Forgings, Tubing, and Rings 0.75Cr 9.0Ni 4.5Co 1.0Mo 0.09V (0.17-0.23C) Consumable Electrode Vacuum Melted
This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings.
These products have been used typically for heat-treated parts, requiring toughness and through-hardening to high strength levels and where such parts may require welding during fabrication, but usage is not limited to such applications.
Society of Automotive Engineers [sae]