Steel alloy for the aerospace industry 300M

300M is a low alloy, vacuum melted, steel of very high strength. Essentially it is a modified AISI 4340 steel with silicon, vanadium and slightly greater carbon and molybdenum content than 4340. 300M alloy steel (AMS 6257, AMS 6417, AMS 6419) has a very good combination of strength (1900-2100 MPA after final heat treatment), toughness, fatigue strength and good ductility. 300M is a through hardening alloy. SPECIFIC GRAVITY 7.83 g/cm3 TYPICAL APPLICATIONS RELATED SPECIFICATIONS Aircraft Landing Gear Driveshafts High Strength bolts Gears AMS 6257 AMS 6417 AMS 6419 BS S155 BMS 7-26 MTL 1201 MIL S 8844