| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a precipitation strengthening type heat resistant steel which has a lower Ni content than JIS SUH660, has a low cost, has higher strength, is suppressed in the precipitation of the η phase, and has excellent characteristics against change with elapsed time. <P>SOLUTION: The precipitation strengthening type heat resistant steel has a composition containing, by mass%, 0.005 to 0.2% C, 2% or less Si, 1.6 to 5% Mn, 15 to less than 20% Ni, 10 to 20% Cr, more than 2 to 4% Ti, 0.1 to 2% Al, and 0.001 to 0.02% or less B, wherein Ni/Mn is 3 to 10, Ni+Mn is 18 to less than 25%, and Ti/Al is 2 to 20, with the balance being Fe and inevitable impurities. <P>COPYRIGHT: (C)2013,JPO&INPIT |
