Historical
SAE AMS 6520D-1995 (SAE AMS6520D-1995)
Steel, Maraging, Sheet, Strip, and Plate, 18Ni 7.8Co 4.9Mo 0.40Ti 0.10Al, Consumable Electrode Melted, Solution Heat Treated ( Reaffirmed: Feb 2006 )
This specification covers a premium aircraft-quality, maraging steel in the form of sheet, strip, and plate. These products have been used typically for large booster rocket applications, pressure vessels, and other components requiring through-hardening, without quenching, to a yield strength of 245 ksi (1689 MPa) or higher, but usage is not limited to such applications.
Society of Automotive Engineers [sae]