抄録
For life extension of fossil power plants, one of the most important subjects is to evaluate creep damage in high-temperature components such as boiler and turbine. In the life prediction, hardness is very important because it shows good correlation with some properties of materials and it is easy to measure. So far, hot hardness hasn't been used for the evaluation of creep damage. This paper reports the availability of using hot hardness for more accurate creep damage.