A tube of a Fe-Cr-Al alloy

Abstract

The present disclosure relates to a Fe—Cr—Al tube. More specifically. the present disclosure relates to a Fe—Cr—Al tube having a specific powder composition: in weight %: p Cr 12.00 to 25.00; A1 3.50 to 6.50:5 Ti 0.20 to 1.10; N 0.06 to 0.20; Zr 0.05 to 0.20; Y 0.01 to 0.15; C≤0.050; 0 Si≤0.50; Hf≤0.30; Ta≤0.30; Mn≤0.40; Ni≤0.60:5 O≤600 ppm; balance Fe and unavoidable impurities: wherein TiN is present as inoculant.

1 . A tube of an iron-chromium-aluminum (Fe—Cr—Al) alloy characterized in that the Fe—Cr—Al alloy is manufactured from a powder with the following composition in weight % 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   Cr 
                   12.00 to 25.00; 
                 
                     
                   Al 
                   3.50 to 6.50; 
                 
                     
                   Ti 
                   0.20 to 1.10; 
                 
                     
                   N 
                   0.06 to 0.20; 
                 
                     
                   Zr 
                   0.05 to 0.20; 
                 
                     
                   Y 
                   0.01 to 0.15; 
                 
                     
                   C 
                   ≤0.050; 
                 
                     
                   Si 
                   ≤0.50; 
                 
                     
                   Hf 
                   ≤0.30; 
                 
                     
                   Ta 
                   ≤0.30; 
                 
                     
                   Mn 
                   ≤0.40; 
                 
                     
                   Ni 
                   ≤0.60; 
                 
                     
                   O 
                   ≤600 ppm; 
                 
                     
                     
                   balance Fe and unavoidable 
                 
                     
                     
                   impurities; wherein TiN is 
                 
                     
                     
                   present as inoculant. 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         2 . The tube according to  claim 1 , wherein the powder has the following composition in weight %: 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   Cr 
                   12.00 to 25.00; 
                 
                     
                   Al 
                   3.50 to 6.50; 
                 
                     
                   Ti 
                   0.20 to 1.10; 
                 
                     
                   N 
                   0.06 to 0.20; 
                 
                     
                   Zr 
                   0.05 to 0.20; 
                 
                     
                   Y 
                   0.02 to 0.15; 
                 
                     
                   C 
                   ≤0.050; 
                 
                     
                   Si 
                   ≤0.50; 
                 
                     
                   Hf 
                   ≤0.30; 
                 
                     
                   Ta 
                   ≤0.30; 
                 
                     
                   Mn 
                   ≤0.40; 
                 
                     
                   Ni 
                   ≤0.60; 
                 
                     
                   O 
                   ≤600 ppm; 
                 
                     
                     
                   balance Fe and unavoidable 
                 
                     
                     
                   impurities; wherein TiN is 
                 
                     
                     
                   present as inoculant. 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         3 . The tube of a Fe—Cr—Al alloy according to  claim 1 , wherein the Cr content is from 18.0 to 24.0 wt %. 
     
     
         4 . The tube of a Fe—Cr—Al alloy according to  claim 1 , wherein the Al content is from 4.0 to 6.0 wt %. 
     
     
         5 . The tube of a Fe—Cr—Al alloy according to  claim 1 , wherein the Ti content is from 0.30 to 1.00 wt %. 
     
     
         6 . The tube of a Fe—Cr—Al alloy according  claim 1 , wherein the N content is from 0.09 to 0.20 wt %. 
     
     
         7 . The tube of a Fe—Cr—Al alloy according  claim 1 , wherein the Zr content is from 0.07 to 0.10 wt %. 
     
     
         8 . The tube of a Fe—Cr—Al alloy according to  claim 1 , wherein Ti/N ≥ 3.3. 
     
     
         9 . Use of the powder with a composition according to  claim 1  for manufacturing a tube. 
     
     
         10 . Use of an alloy with a composition according to  claim 1  for manufacturing a tube.