A hook is designed to operate at 760 degree C for 30000 hour

A hook is designed to operate at 760 degree C for 30000 hours. Maximum stress that can be applied to this hook that is manufactures using iron-chromium-nickel is 1000 psi 1800 psi 7000 psi None of the above Select the best hardness scale to measure hardness of a hard quenched steel Rock well C nanoindentation Rockwell B None of the above