AMS6515C Steel, Maraging, Bars, Forgings, Mechanical Tubing, Rings, and Stock for Forgings and Rings, 18.5Ni - 12.0Co - 4.9Mo - 1.40Ti - 0.10Al, Premium Aircraft Quality, Double Vacuum Melted, Annealed (Maraging 350)

AMS6515C is the result of a Five-Year Review and update of the document. The revision updates the Title and Scope consistent with similar specifications (see 1.1 and 1.2), revises composition testing and reporting requirements (see 3.1.1 and 3.1.2), clarifies melting practice (see 3.2), updates prohibition on unauthorized exceptions (see 3.5.5.1.2, 4.4.4, and 8.6), updates heat-treatment control (see 3.4), updates macrostructure requirements (see 3.5.1 and 8.7), revises micro-inclusion rate method requirements (see 3.5.2), addresses options on forging stock testing (see 3.5.6.1), and adds a note on use of AS1182 (see 8.5).