The materials monitoring and evaluation programme is a part of the overall experimental programme for the IEA Pressurized Fluidized Bed Combustion Facility at Grimethorp, South Yorkshire, UK. Its objectives include materials testing and evaluation, component monitoring and component failure analysis. Such work forms part of the Project remit to develop a comprehensive set of PFBC performance data on combustion efficiency, sulphur retention, gaseous emissions, heat transfer, hot gas clean up, and component reliability. This report describes the results of the materials programme for the period of operation of the Facility from June 1982 to April 1983. 22 refs., 25 figs., 6 tabs.