Phytime is a maraging steel with a 2068 MPa (300 ksi) strength and a very high yield strength due to precipitation hardening. The major improvement over Durimphy (see Alloy Digest Fe-140, February 2007) is cleanliness and improved fatigue performance. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: FE-141. Producer or source: Metalimphy Precision Alloys.