Iron-manganese alloy having improved weldability

Abstract

Disclosed is an iron-manganese alloy including, by weight: 25.0%≤Mn≤32.0%; 7.0%≤Cr≤14.0%; 0≤Ni≤2.5%; 0.05%≤N≤0.30%; 0.1≤Si≤0.5%; and optionally 0.010%≤rare earths≤0.14%. The remainder being iron and residual elements resulting from manufacturing.

1 . An iron-manganese alloy comprising, by weight: 
       
         
           
             
               
                 25. 
                 % 
               
               ≤ 
               Mn 
               ≤ 
               
                 32. 
                 % 
               
             
           
         
         
           
             
               
                 7. 
                 % 
               
               ≤ 
               Cr 
               ≤ 
               
                 14. 
                 % 
               
             
           
         
         
           
             
               0 
               ≤ 
               Ni 
               ≤ 
               
                 2.5 
                 % 
               
             
           
         
         
           
             
               
                 0.05 
                 % 
               
               ≤ 
               N 
               ≤ 
               
                 0.3 
                 % 
               
             
           
         
         
           
             
               0.1 
               ≤ 
               Si 
               ≤ 
               
                 0.5 
                 % 
               
             
           
         
       
       the remainder being iron and residual elements resulting from manufacturing. 
     
     
         2 . The alloy according to  claim 1 , wherein the chromium content is between 8.5 and 11.5 weight %. 
     
     
         3 . The alloy according to  claim 1 , wherein the nickel content is between 0.5 and 2.5 weight %. 
     
     
         4 . The alloy according to  claim 1 , wherein the nitrogen content is higher than or equal to 0.15 weight %. 
     
     
         5 . The alloy according to  claim 2 , wherein the nitrogen content is higher than or equal to 0.15 weight %. 
     
     
         6 . The alloy according to  claim 5 , wherein the nitrogen content is between 0.15 and 0.25 weight %. 
     
     
         7 . The alloy according to  claim 1 , further comprising one or more rare earths selected from among: lanthanum, cerium, yttrium, praseodymium, neodymium, samarium, and ytterbium. 
     
     
         8 . The alloy according to  claim 2 , further comprising one or more rare earths selected from among: lanthanum, cerium, yttrium, praseodymium, neodymium, samarium, and ytterbium. 
     
     
         9 . The alloy according to  claim 4 , further comprising one or more rare earths selected from among: lanthanum, cerium, yttrium, praseodymium, neodymium, samarium, and ytterbium. 
     
     
         10 . The alloy according to  claim 5 , further comprising one or more rare earths selected from among: lanthanum, cerium, yttrium, praseodymium, neodymium, samarium, and ytterbium. 
     
     
         11 . The alloy according to  claim 6 , further comprising one or more rare earths selected from among: lanthanum, cerium, yttrium, praseodymium, neodymium, samarium, and ytterbium. 
     
     
         12 . The alloy according to  claim 7 , further comprising one or more rare earths at a total content lower than or equal to 0.14 wt. %. 
     
     
         13 . The alloy according to  claim 8 , further comprising one or more rare earths at a total content lower than or equal to 0.14 wt. %. 
     
     
         14 . The alloy according to  claim 9 , further comprising one or more rare earths at a total content lower than or equal to 0.14 wt. %. 
     
     
         15 . The alloy according to  claim 10 , further comprising one or more rare earths at a total content lower than or equal to 0.14 wt. %. 
     
     
         16 . The alloy according to  claim 12 , wherein the total content of rare earths is higher than or equal to 0.010%. 
     
     
         17 . The alloy according to  claim 13 , wherein the total content of rare earths is higher than or equal to 0.010%. 
     
     
         18 . The alloy according to  claim 14 , wherein the total content of rare earths is higher than or equal to 0.010%. 
     
     
         19 . Strip made from an iron-manganese alloy according to  claim 1 . 
     
     
         20 . Wire made from an iron-manganese alloy according to  claim 1 .