Theoretically, the torque value of high-strength bolts that have not reached the yield strength can be reduced. However, there is a problem here. Why didn't the bolt reach the yield strength? If it is a normal process, it should have arrived and failed. I think we should check the reason first. If it is because of the material itself, even if the torque value decreases, it will bring potential hidden dangers, such as delayed fracture or easy fatigue failure caused by poor conditions such as loose segregation inclusions in the material.