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SAE AMS 6470R-2024
Steel, Nitriding, Bars, Forgings, Mechanical Tubing, and Forging Stock 1.6Cr - 0.35Mo - 1.13Al (0.38 - 0.43C) (135 Mod) Aircraft Quality
This specification covers an aircraft-quality nitriding grade low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
Society of Automotive Engineers [sae]