Lean austenitic stainless steel
AssigneeATI Properties, Inc.
InventorsDavid S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
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Abstract
An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.
Claims30
An austenitic stainless steel consisting of, in % weight,
- up to 0.20 C,
- 2.0-9.0 Mn,
- up to 1.0 Si,
- 16.0-23.0 Cr,
- 1.0-3.0 Ni,
- up to 3.0 Mo,
- 0.1-0.35 N,
- 0.05 to 4.0 W,
- up to 0.01 B,
- up to 1.0 Co,
- iron and
- impurities,
- the steel having a ferrite number of at least 3 up to less than 10, and a MD30 value less than 20° C.
An austenitic stainless steel consisting of, in % weight,
- up to 0.20 C,
- 2.0-9.0 Mn,
- up to 1.0 Si,
- 16.0-23.0 Cr,
- 1.0-3.0 Ni,
- 0.40-3.0 Mo,
- 0.1-0.30 N,
- 0.05 to 4.0 W,
- up to 0.01 B,
- up to 1.0 Co,
- iron and
- impurities,
- the steel having a ferrite number at least 3 up to 10, a PREW value greater than 22 up to 30, and a MD30 value of less than 20° C.
An article of manufacture including an austenitic stainless steel consisting of, in % weight,
- up to 0.20 C,
- 2.0-9.0 Mn,
- up to 1.0 Si,
- 16.0-23.0 Cr,
- 1.0-3.0 Ni,
- up to 3.0 Mo,
- 0.1-0.35 N,
- 0.05 to 4.0 W,
- up to 0.01 B,
- up to 1.0 Co,
- iron and
- impurities, the steel having a ferrite number of at least 3 up to less than 10, and a MD30 value less than 20° C.
Dependencies are inferred from the claim text.