| 摘要 |
The stainless steel includes C: 0.001 to 0.02%, N: 0.001 to 0.02%, Si: 0.01 to 0.5%, Mn: 0.05 to 0.47%, P: 0.04% or less, S: 0.01% or less, Ni: more than 3% to 5%, Cr: 16 to 26%, and either one or both of Ti: 0.01 to 0.5% and Nb: 0.02 to 0.6%, and contains as the remainder, Fe and unavoidable impurities, wherein the combined ratio of austenite phase and martensite phase is 15% or less, ferrite phase is included as the remainder, and the grain size number of the ferrite phase is No. 4 or greater. |
