Ferritic steels as 2.25Cr-1Mo and 9Cr-1Mo (Grades T22 and T9) are used for a broad range of industrial applications in the chemical industry and power generation. While these steels are preferred for their low thermal expansion and high thermal conductivity, increase in their strength is desirable to reduce the section thickness of various components. For example, some pressure vessels use section thicknesses of approximately ten inches (250 mm) and it will be desirable to reduce it to half with benefits of ease of fabrication, reduced welding time, and reduced overall component weight. Improvements of 2.25Cr-1Mo (T22) have resulted in new grades (T23 and T24). The purpose of this presentation is to describe the development of a new class of Fe-3Cr-W(V) steels. These steels have strength properties that exceed the currently highest strength alloy, T23. The paper will also present the status of obtaining ASTM and ASME Code approvals for the new alloys. ______________ *Research sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Industrial Technologies Program, Industrial Materials for the Future, under contact DE-AC05-00OR22725 with UT-Battelle, LLC.