US 2026/0250818 A1 · AUSTENITIC STAINLESS STEEL CONTAINING NIOBIUM

Abstract

An austenitic stainless steel is provided. The austenitic stainless steel includes chromium (Cr), manganese (Mn), nickel (Ni), carbon (C), nitrogen (N), and niobium (Nb), with iron (Fe) as a balance. By incorporating niobium in a specified range, the austenitic stainless steel exhibits an improved pitting corrosion potential compared to conventional STS 304L, thereby providing enhanced corrosion resistance and cost competitiveness compared to existing austenitic stainless steels. The austenitic stainless steel further demonstrates high cryogenic toughness, with an impact absorption energy of at least 41 J at a temperature of approximately −196° C.

Claims20

Dependent claims

An austenitic stainless steel comprising:

16 to 20 wt % chromium (Cr);
4.5 to 9 wt % manganese (Mn);
3 to 6 wt % nickel (Ni);
0.001 to 0.3 wt % carbon (C);
0.1 to 0.35 wt % nitrogen (N);
0.01 to 0.5 wt % niobium (Nb);
and
a balance of iron (Fe) and unavoidable impurities.

5 more elements

Dependencies are inferred from the claim text.

Austenitic stainless steel containing niobium

Life of this patent

Austenitic stainless steel containing niobium

Life of this patent

Abstract

Claims20