Dillimax 550 is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of 550 MPa (80 ksi). Plate is delivered in three qualities: basic, high toughness, and extra tough. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-649. Producer or source: Dillinger Hütte GTS.