AMS6439F Steel Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.42 - 0.48C) (D6AC) Consumable Electrode Vacuum Melted, Annealed

AMS6439 is the result of a Five-Year Review and update of the specification. The revision prohibits unauthorized exceptions (3.7, 4.4.1, 5.1.1. 8.5), updates the composition testing (3.1), adds continuous heat treatment (3.3.3), updates decarburization methods (3.4.3), allows alternate cooling methods (3.4.4), limits tensile testing strain rate (3.4.4.1.1), and allows prior revisions (8.6).