Austenitic Stainless Steel Alloy

Abstract

An austenitic stainless steel alloy is provided that includes 0.7-1.2 wt % of N, 10-25 wt % of Ni, 26-34 wt % of Cr, 0.1-1.0 wt % of Nb, 0.1-1.0 wt % of V, and a balance of Fe and incidental impurities.

What is claimed is: 
     
         1 . An austenitic stainless steel alloy, comprising:
 0.7-1.2 wt % of N;   10-25 wt % of Ni;   26-34 wt % of Cr;   0.1-1.0 wt % of Nb;   0.1-1.0 wt % of V; and   a balance of Fe and incidental impurities.   
     
     
         2 . The austenitic stainless steel alloy according to  claim 1 , wherein there are one or more additional elements. 
     
     
         3 . The austenitic stainless steel alloy according to  claim 2 , wherein the one or more additional elements are optionally C, Mo, Cu, Mn, S, Si, or B. 
     
     
         4 . The austenitic stainless steel alloy according to  claim 3 , wherein the one or more additional elements are optionally ≦0.08 wt % of C, ≦4.0 wt % of Mo, ≦4 wt % of Cu, 2.0 to 10.0 wt % of Mn, ≦0.01 wt % of S, ≦2 wt % of Si, ≦0.006 wt % of B 
     
     
         5 . The austenitic stainless steel alloy according to  claim 1 , wherein the Nb is 0.1-0.5 wt %. 
     
     
         6 . The austenitic stainless steel alloy according to  claim 5 , wherein the Nb is 0.1-0.3 wt %. 
     
     
         7 . The austenitic stainless steel alloy according to  claim 5 , wherein the V is 0.1-0.5 wt %. 
     
     
         8 . The austenitic stainless steel alloy according to  claim 7 , wherein the V is 0.1-0.3 wt %. 
     
     
         9 . The austenitic stainless steel alloy according to  claim 7 , wherein the Ni is 12-22 wt %. 
     
     
         10 . The austenitic stainless steel alloy according to  claim 9 , wherein the Ni is 14-18 wt %. 
     
     
         11 . The austenitic stainless steel alloy according to  claim 9 , wherein the Cr is 28-33 wt %. 
     
     
         12 . The austenitic stainless steel alloy according to  claim 11 , wherein the Cr is 30-32 wt % Cr. 
     
     
         13 . The austenitic stainless steel alloy according to  claim 11 , wherein the one or more additional elements are optionally C, Mo, Cu, Mn, S, Si, or B. 
     
     
         14 . The austenitic stainless steel alloy according to  claim 13 , wherein the one or more additional elements are optionally ≦0.05 wt % of C, 0.5-3.0 wt % of Mo, ≦3 wt % of Cu, 3.0-8.0 wt % of Mn, ≦0.05 wt % of S, ≦1 wt % of Si, 0.001-0.005 wt % of B 
     
     
         15 . The austenitic stainless steel alloy according to  claim 14 , wherein the C is ≦0.03 wt % 
     
     
         16 . The austenitic stainless steel alloy according to  claim 14 , wherein the Mo is 0.075-1.50 wt %. 
     
     
         17 . The austenitic stainless steel alloy according to  claim 14 , wherein the Cu is 0.5-2.5 wt %. 
     
     
         18 . The austenitic stainless steel alloy according to  claim 14 , wherein the Mn is 4.0-7.0 wt %. 
     
     
         19 . The austenitic stainless steel alloy according to  claim 14 , wherein the S is ≦0.003 wt %. 
     
     
         20 . The austenitic stainless steel alloy according to  claim 14 , wherein the B is 0.002-0.004 wt %.