C100 steel is an equivalent of 1095 steel. It is almost identical to steel 1095 (1% carbon, 0.5% manganese). It normally reaches a hardness of 58-60 HRC. Very hard steel with great edge retention and good wear resistance. On the other hand, C100 steel has a very low corrosion resistance. It rusts very easily, and needs proper care and maintenance. After every use, rinse the blade, wipe it clean, and oil it to prevent rust.

Knives with 1095 (C100, XC100) carbon steel here