Finkl 420 Premium Quality stainless steel is a modification of AISI 420 with vacuum arc degassing and vacuum arc remelting. The modification results in a refined structure yielding cleanliness, strength, and isotropic properties. This datasheet provides information on composition, physical properties, and hardness. It also includes information on heat treating. Filing Code: SS-707. Producer or source: A. Finkl & Sons Company.