The dynamic strength and toughness of P91 steel with different temper technology

The dynamic strength and toughness of P91 steel has been studied by means of the instrumented impact test with normalized P91 steel subjected to different temper temperatures. By contrast with the fractographic characteristic, the P91 steel property parameters of instrumented charpy impact test has been analysed. The optimized temper temperature is 750 - 780 ℃.