An AISI 1030 hot rolled steel bar has a diameter of 1.5in. For unknown factors including the reliability factor, set equal to 1.

Estimate the:

a. Endurance limit (Se’)

b. Corrected endurance limit in bending and rotation (Se). Assume that there is no axial loading. Assume that component is used at room temperature. Assume that a 50% reliability that the endurance strength of your material is within 8% of the mean value reported is acceptable.

c. Corrected endurance limit for reverse bending without rotation (Se). Assume that there is no axial loading. Assume that component is used at room temperature. Assume that a 50% reliability that the endurance strength of your material is within 8% of the mean value reported is acceptable. Note: the size factor will change compared to previous question.