SUPERSEDING SPECIFICATION: The requirements of this specification are embodied in the latest issue of AMS 6419, STEEL BARS, FORGINGS, AND TUBING, 1.6Si 0.82Cr 1.8Ni 0.40Mo 0.08V (0.40 0.45C), Premium Quality, Consumable Electrode Melted. The requirements of the latest issue of AMS 6419 shall be fulfilled whenever reference is made to this specification.