AMS6499C Steel, Bars, Forgings, Mechanical Tubing and Forging Stock, 2.7Si - 0.85Cr - 1.8Ni - 0.4Mo - 0.2V - (0.37 - 0.44C) Premium Aircraft Quality, Double Vacuum Melted

AMS6499C is the result of a Five-Year Review and update of the specification. The revision updates the Title to match the Scope, quality, and adds a standard identifier for the material, adds composition reporting requirements (see 3.1.1), updates exception requirements (see 4.4.4 and 8.7), revises macrostructure requirements (see 3.4.1 and 8.8) and decarburization requirements (see 3.4.3.5), updates the heat-treatment requirements to industry standards for this material, and adds pyrometry (see 3.4.4), stock removal (see 8.5), and ordering options for forging stock (see 4.4.3 and 8.8).