Use of an austenitic stainless steel

Abstract

Austenitic alloy with following composition, in weight-percent: Cr 23-30, Ni 25-35, Mo 2.0-6.0, Mn 1.0-6.0, N 0-0.4, C up to 0.05, Si up to 1.0, S up to 0.02, Cu up to 3.0, W 0-6.0, one or more element of Mg, Ce, Ca, B, La, Pr, Zr, Ti, Nd up to 2.0 and balance Fe and normally occurring impurities and additions as wire in oil- and gasextraction, specially reinforcement wire in the application wirelines and which shows a combination of good corrosion resistance and good mechanical properties, especially a tensile strength of at least 310 kpsi at diameters of 1.0 mm and thinner.

1 . An austenitic stainless alloy comprising the following composition, in weight-percent:  
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                     
                 
                     
                   Cr 
                    23-30 
                 
                     
                   Ni 
                    25-35 
                 
                     
                   Mo 
                     3-6 
                 
                     
                   Mn 
                     1-6 
                 
                     
                   N 
                   0.0-40 
                 
                     
                   C 
                   up to 0.05 
                 
                     
                   Si 
                   up to 1.0 
                 
                     
                   S 
                   up to 0.02 
                 
                     
                   Cu 
                   up to 3.0 
                 
                     
                   W 
                     0-6.0 
                 
                     
                     
                 
                     
                     
                 
             
                
                
               
               
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
         one or more of the Elements Mg, Ce, Ca, B, La, Pr, Zr, Ti, Nd up to 2.0  
         and the balance Fe and normally occurring impurities and additions.  
       
     
     
         2 . The austenitic stainless alloy of  claim 1 , wherein a tensile strength of the austenitic stainless alloy is at least 310 kpsi at a diameter of less than or equal to 1.0 mm.  
     
     
         3 . A reinforcement wire for a wireline having the composition of the austenitic stainless alloy of  claim 1 .  
     
     
         4 . The reinforcement wire of  claim 3 , wherein the wireline is in an oil and gas extraction application.  
     
     
         5 . The use of the austenitic stainless alloy of  claim 1  in oil and gas extraction.