Thyrodur 2550 is a cold-work steel with very good toughness. It is dimensionally stable, impact-resistant, and has a high hardening capacity. It is similar to AISI S1. A typical application is as cold shear knives. This datasheet provides information on composition, physical properties, and hardness. It also includes information on forming and heat treating. Filing Code: TS-649. Producer or source: Schmolz + Bickenbach USA Inc.