AMS6471K Steel, Nitriding, Bars, Forgings, Mechanical Tubing, and Stock for Forging, 1.6Cr - 0.35Mo - 1.13Al (0.38 - 0.43C) (135 Mod), Premium Aircraft Quality, Consumable Electrode Vacuum Remelted

AMS6471K is the result of a Five-Year Review and update of the specification. The revision updates the Title in line with the Scope and Quality of the product, adds composition reporting information (see 3.1.1), clarifies macrostructure requirements (see 3.4.1 and 8.8), updates hardenability requirements (see 3.4.3), revises decarburization testing methods (see 3.4.4.5), adds ordering options for forging stock (see 4.4.3 and 8.8), adds information on ordering bar (see 8.5), and updates the prohibition on product exceptions (see 4.4.4 and 8.7).