MIL-S-6049A, MILITARY SPECIFICATION, STEEL, CHROME-NICKEL-MOLYBDENUM (8740) BARS AND REFORGING STOCK (AIRCRAFT QUALITY) (28 JUN 1967) [S/S BY SAE-AMS6322, SAE-AMS6325 AND SAE-AMS6327]., This specification presents the requirements for chrome-nickel-molybdenum (8740) steel bars and reforging stock of aircraft quality.