What material is generally used for press brake dies? What is the hardness?

There are many kinds of materials, such as T10 or 42CrMo, and the hardness is generally about HRC45-50.

• Cr12Mo1V1, 42CrMo, 9CrSi, T10, 80#
• Quenching and hardening: HRC46 ° – 62 °