PERFORM 355 is one of the Perform series of steels, which are low carbon micro-alloyed steels that are thermomechanically rolled. The 355 in the title refers to the minimum yield strength in MPa (51 ksi). The USA equivalent is Perform 50. This datasheet provides information on composition, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming and joining. Filing Code: SA-726. Producer or source: ThyssenKrupp Steel Europe AG.