Steady-state creep data taken for an iron at a stress level of 140 MPa (20,000 psi) are gi...

Steady-state creep data taken for an iron at a stress level of 140 MPa (20,000 psi) are given here:

If it is known that the value of the stress exponent n for this alloy is 8.5, compute the steady-state creep rate at 1300 K and a stress level of 83 MPa (12,000 psi).