ALLEGHENY LUDLUM HTB-2 is a chromium-molybdenum-vanadium steel of the type commonly referred to as M-50. It is vacuum melted to meet cleanliness and rolling-contact-fatigue requirements of critical bearing applications for operating at elevated temperatures. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as heat treating and machining. Filing Code: TS-288. Producer or source: Allegheny Ludlum Corporation.