13-5 Steady-state creep rate can be expressed by ė, = Bone-Q/kT Apply this relationship to the creep of a steel support rod in a boiler operating at 1000° F. The rod is stressed in tension to 8,000 psi and its creep elongation must not exceed 10 percent. Using the data given below, evaluate the constants in the creep equation and estimate the lifetime of the rod. 10-2 10-4 10-6 20,000 psi 108 6,000 psi 10,000 psi 5.5 6.0 65 70 75 80 85×104 Reciprocal temperature, 1/7 (R¹)