Improving the Surface Properties of an API 5L Grade B Pipeline Steel by Applying the Boriding Process—Part II: On the Changes in the Mechanical Properties

The mechanical performance of API 5L grade B steel, after undergoing a thermochemical boriding process, was assessed. We quantified the boride layer microhardness over cross-section specimens, with aim characterizing resistance under different conditions. pipeline steel analyzed because changes in yield strength, ultimate tensile and ductility treatment boron. These oil gas pipelines must work aggressive environments, so borided specimens were tested to assess their erosion–corrosion resistance. Another important characteristic evaluate wearing resistance, tend suffer scratches when they are construction. also present discussion results total research (Part I Part II), including characterization as well substrate, goal selecting best conditions which treat steel. More extreme can help form more stable resistant layers, but considerably modify some characteristics For this reason, be chosen synergistic way.