ADVANCED HIGH TEMPERATURE TESTING OF FERRITIC PRESSURE VESSEL STEEL

This work describes three test methods employed to assess the condition of components in high temperature power generation plant. These are stress relaxation on miniature samples from service aged material, low cycle fatigue testing by strain control and Young’s Modulus determination by an impulse excitation technique. Data are presented from tests on 2.25Cr-1Mo virgin and service-aged steel and the application of data to life assessment procedures is discussed.