The properties of domestic 10Cr rotor forging steel used for USC turbine were compared with imported one

including tensile strength

hardness

microstructure

impact toughness

room temperature(RT)fracture toughness

low-cycle fatigue

creep rupture strength.The results indicate that properties like tensile strength

hardness and microstructure of the two materials are similar

while properties like impact toughness

RT fracture toughness

creep rupture strength

low cycle fatigue of domestic rotor steel are obviously lower than those of foreign steel.In view of the inferior of domestic steel

special supervision measures should be taken

such as controlling the times of shutdown/startup and warming/cooling rate during that period.