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SAE AMS 6325M-2024
Steel, Bars, and Forgings, Aircraft Quality, 0.50Cr - 0.55Ni - 0.25Mo (0.38 - 0.43C) (SAE 8740), Heat Treated, 105 ksi (724 MPa) Tensile Strength
This specification covers an aircraft-quality, low-alloy steel in the form of heat-treated bars and forgings.
Society of Automotive Engineers [sae]