Stainless steel product
Provided is a stainless steel product having a chemical composition consisting of C: less than 0.05%, Si: 4.0 to 7.0%, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 20.0%, Ni: 11.0 to 17.0%, Cu: 0.15 to 1.5%, Mo: 0.15 to 1.5%, Nb: 0.5 to 1.2%, Sol. Al: 0 to 0.10%, Mg: 0 to 0.01%, and balance Fe and impurities, wherein MgO.Al 2 O 3 inclusions constitute an area fraction of 0.02% or less. This stainless steel product has excellent corrosion resistance to hot concentrated sulfuric acid of approximately 93 to 99% concentration, for example, and also is economically advantageous.
1. A stainless steel product comprising a chemical composition consisting of, by mass,
C: less than 0.05%,
Si: 4.0 to 7.0%,
Mn: 1.50% or less,
P: 0.030% or less,
S: 0.030% or less,
Cr: 10.0 to 20.0%,
Ni: 11.0 to 17.0%,
Cu: 0.15 to 1.5%,
Mo: 0.15 to 1.5%,
Nb: 0.5 to 1.2%,
Sol. Al: 0 to 0.10%,
Mg: 0.001 to 0.01%, and
balance Fe and impurities,
wherein MgO.Al 2 O 3 inclusions constitute an area fraction of 0.010% or more, 0.02% or less.
2. The stainless steel product according to claim 1 ,
wherein the MgO.Al 2 O 3 inclusions have an average particle size of 5.0 μm or less.