Finkl MD AISI P-20 is an improved grade of standard AISI P-20, which is suitable for mold applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on heat treating, machining, joining, and surface treatment. Filing Code: TS-557. Producer or source: A. Finkl & Sons Company.