The present work aimed to compare the effect of two different bending parameters on the microstructure and the yield stress of a API5L X80 steel pipe (679 MPa) with Pcm of 0.17 percent and sigma NbTiV of 0.11 percent produced by the UOE process and originated from a plate obtained by thermomechanical processing without accelerating cooling. The two bending parameters considered power of 105 kW and 2500 Hz of frequency and 205 kW and 500Hz. The increase in power lead to a higher heat input and a thicker layer of heat affected zone, due to the lower frequency and the resistance to the eddy currents which resulted in a more homogeneous distribution of the austenitic grain size increasing the hardenability. During the bending process, a temperature gradient is formed through the thickness, where this temperature gradient is formed, while the external surface is water quenched the internal surface is still air cooled, leading to a microstructural and mechanical properties changes. The strength values obtained after bent at 500Hz, closed to those determined by the API 5L, are credited to the presence of a higher depth and volume fraction of ferrite bainite through thickness. The post heat treatment at 600oC proved to be, in both cases, the optimized temperature in order to improve the yield stress and leading better values of toughness.