Optim 900 QC (896 MPa minimum yield strength) is a quenched (Q), cold formable (C) steel that exceeds most other materials with the tightest bend radius. The Optim family of alloys offers high strength and good workshop properties. This datasheet provides information on composition, physical properties, microstructure, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, heat treating, and joining. Filing Code: CS-180. Producer or source: Rautaruukki Corporation.