| 摘要 |
Ferritic stainless steel comprising all three of Co, V, and B, having a Co content of about 0.01mass% to about 0.3mass%, a V content of about 0.01mass% to about 0.3mass%, and a B content of about 0.0002mass% to about 0.0050mass%, and having superior secondary working embrittleness resistance and superior high temperature fatigue characteristics. Further components are (in mass%): 0.02% or less of C, 0.2 to 1.0% Si, 0.1 to 1.5% Mn, 0.04% or less of P, 0.01% or less of S, 11.0 to 20.0% of Cr, 0.1 to 1.0% Ni, 1.0 to 2.0% Mo, 1.0% or less of Al, 0.2 to 0.8% of Nb, 0.02% or less of N and optionally 0.05 to 0.5% Ti, Zr or Ta, 0.1 to 2.0% Cu, 0.05 to 1.0% W, 0.001 to 0.1% Mg and 0.0005 to 0.005% Ca. |
