Patent ID: 6074169
Filing Date: 2000-06-13
Classification: C22C,F01D,F05D

Abstract:
A high and low pressure sides integrating steam turbine for 50 Hz power generation, comprising a rotor having a mono-block rotor shaft with blades mounted thereon in multi-stages from a high pressure side to a low pressure side, and a casing covering said rotor,wherein blades of at least a final stage each have blade portion length of 41.7 inches or more and are made of martensite stainless steel, said martensite stainless steel having a 20.degree. C. V-notch sharpy impact value of 2.5 kgm/cm.sup.2 or more and room-temperature tensile strength of 120 kg/mm.sup.2 or more, and said impact value (kgm/cm.sup.2) being not less than a value obtained by (-0.6x+77.2) when said room-temperature tensile strength (kg/mm.sup.2) is denoted by x.