| 摘要 |
Provided is austenitic stainless steel having high-temperature strength and excellent nitric acid corrosion resistance. The austenitic stainless steel of this embodiment contains, by mass%, C: 0.050% or less, Si: 0.01-1.00%, Mn: 1.75-2.50%, P: 0.050% or less, S: 0.0100% or less, Ni: 20.00-24.00%, Cr: 23.00-27.00%, Mo: 1.80-3.20%, and N: 0.110-0.180%; the remainder comprises Fe and impurities; the grain size number of the crystal grains is 6.0 or higher based on JIS G0551(2005); and the area ratio of the s phase is 0.1% or lower. |
