Engineering, Materials and Components

Which of the following statements is correct?

The hardness of the dies for open-die forging is generally higher than the hardness of impression dies for closed-die forging

The hardness of dies for open-die forging is generally lower than the hardness of impression dies for closed-die forging

The life of dies for open-die forging is less than that of impression dies for closed-die forging

Both B and C are true