ASTM/ASME A/SA387 Grade 91 is a modified 9Cr-1Mo steel composed of nitrogen, niobium and vanadium. Although the most common form of Grade 91 material is a plate form, the steel is incorporated into ...
John P. Coulter, a professor of mechanical engineering and mechanics and senior associate dean for research in Lehigh University’s P.C. Rossin College of Engineering and Applied Science, has been ...