Austenite stainless steel material, method for producing same, and designed articles
AssigneeNippon Steel Stainless Steel Corporation
InventorsSeiichi ISOZAKI, Yasushi NISHIMURA, Naoki HIRAKAWA
Life of this patent
Estimating the term…
Abstract
An austenite stainless steel material includes, on a mass basis, 0.024% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.015% or less of S, 10.0 to 15.0% of Ni, 15.0 to 22.0% of Cr, 2.0 to 4.0% of Mo, 0.01 to 0.15% of N, 0.001 to 0.010% of B, 0.05 to 1.00% of Co, 0.01 to 0.30% of V, 0.01 to 0.30% of W, the balance being Fe and impurities.
Claims13
An austenite stainless steel material comprising, on a mass basis, 0.024% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.015% or less of S, 10.0 to 15.0% of Ni, 15.0 to 22.0% of Cr, 2.0 to 4.0% of Mo, 0.01 to 0.15% of N, 0.001 to 0.010% of B, 0.05 to 1.00% of Co, 0.01 to 0.30% of V, 0.01 to 0.30% of W, the balance being Fe and impurities.
(canceled)
A method for producing an austenite stainless steel material, the method comprising subjecting a slab to hot rolling by heating it at a temperature of 1230 to 1300° C., wherein the slab comprises, on a mass basis, 0.024% or less of C, 1.00% or less of Si, 2.00% or less of Mn, 0.045% or less of P, 0.015% or less of S, 10.0 to 15.0% of Ni, 15.0 to 22.0% of Cr, 2.0 to 4.0% of Mo, 0.01 to 0.15% of N, 0.001 to 0.010% of B, 0.05 to 1.00% of Co, 0.01 to 0.30% of V, 0.01 to 0.30% of W, the balance being Fe and impurities, and wherein the slab has 0 to 3.0% by volume of 8 ferrite phase at a depth of 5 mm from a surface of the slab in a thickness direction.
Dependencies are inferred from the claim text.