Metal material having excellent metal dusting resistance

Abstract

[Objective] To provide a metal material having excellent metal dusting resistance which is suited for using cracking furnaces, reforming furnaces, heating furnaces or heat exchangers, in petroleum refining, petrochemical plants, etc. [Means for Solution] A metal material having excellent metal dusting resistance, characterized in comprising, by mass %, C: 0.01 to 0.4%, Si: 0.01 to 2.5%, Mn: 0.01 to 2.5%, Cr: 15 to 35%, Ni: 20 to 65%, Cu: 0.05 to 20%, S: not more than 0.1%, N: not more than 0.25% and O (oxygen): not more than 0.02% and the balance Fe and impurities, and also containing, by mass %, one or more selected among the elements of P: more than 0.05% and not more than 0.3%, Sb: 0.001 to 1% and Bi: 0.001 to 0.5. It may further contain one or more selected among the elements of Nd: 0.001 to 0.15%, Co: not more than 10%, Mo: not more than 3%, W: not more than 6%, Ti: not more than 1%, Nb: not more than 2%, B: not more than 0.1%, Zr: not more than 1.2%, Hf: not more than 0.5%, Mg: not more than 0.1%, Ca: not more than 0.1%, Al: not more than 0.8%, Y: not more than 0.15%, La: not more than 0.15% and Ce: not more than 0.15%.

1 . A metal material having excellent metal dusting resistance, characterized in comprising, by mass %, C, 0.01 to 0.4%, Si: 0.01 to 2.5%, Mn: 0.01 to 2.5%, Cr: 15 to 35%, Ni: 20 to 65%, Cu: 0.05 to 20%, S: not more than 0.1%, N: not more than 0.25% and O (oxygen): not more than 0.02% and the balance Fe and impurities, and also containing, by mass %, one or more selected among the elements of P: more than 0.05% and not more than 0.3%, Sb: 0.001 to 1% and Bi: 0.001 to 0.5. 
     
     
         2 . The metal material having excellent metal dusting resistance according to  claim 1 , characterized in further containing, by mass %, Nd: 0.001 to 0.15%. 
     
     
         3 . The metal material having excellent metal dusting resistance according to  claim 1 , characterized in further comprising at least one element selected from at least one group among the first to sixth groups defined below.
 First group: by mass %, Co: not more than 10%;   Second group: by mass %, Mo: not more than 3% and W: not more than 6%;   Third group: by mass %, Ti: not more than 1% and Nb: not more than 2%;   Fourth group: by mass %, B: not more than 0.1%, Zr: not more than 1.2% and Hf: not more than 0.5%;   Fifth group: by mass %, Mg: not more than 0.1%, Ca: not more than 0.1% and Al: not more than 0.8%;   Sixth group: by mass %, Y: not more than 0.15%, La: not more than 0.15% and Ce: not more than 0.15%.   
     
     
         4 . The metal material having excellent metal dusting resistance according to  claim 2 , characterized in further comprising at least one element selected from at least one group among the first to sixth groups defined below.
 First group: by mass %, Co: not more than 10%;   Second group: by mass %, Mo: not more than 3% and W: not more than 6%;   Third group: by mass %, Ti: not more than 1% and Nb: not more than 2%;   Fourth group: by mass %, B: not more than 0.1%, Zr: not more than 1.2% and Hf: not more than 0.5%;   Fifth group: by mass %, Mg: not more than 0.1%, Ca: not more than 0.1% and Al: not more than 0.8%;   Sixth group: by mass %, Y: not more than 0.15%, La: not more than 0.15% and Ce: not more than 0.15%.