FORGING MEMBER AND STEAM TURBINE ROTOR USING THE SAME, STEAM TURBINE MOVING BLADE, BOILER PIPING, BOILER TUBE AND STEAM TURBINE BOLT USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a large forging member having homogeneity of the grain structure and excellent high-temperature strength.;SOLUTION: A forging member comprises 0.005-0.030 mass% C, 0.10 mass% or less Si, 0.10 mass% or less Mn, 15-21 mass% Cr, 25 mass% or less Co and 1.0-1.5 mass% Al, 5.0-17 mass% Mo and W, specified as the formula Mo+0.5W, specified amounts of Ti, Ta and Nb and remaining Ni and unavoidable impurities.;COPYRIGHT: (C)2014,JPO&INPIT