Dental casting alloy

Abstract

In order to improve the fracture strength of a dental casting alloy and to prevent it from becoming excessively hard, a dental casting alloy is provided substantially comprising: from 25 to 32 wt % of Cr from 8 to 12 wt % of W, from 0.05 to 0.4 wt %, in each case, of one or more elements in Group 4 a and/or Group 5 a of the Periodic Table, production-related impurities, the rest being cobalt.

1 . A dental casting alloy, for the production of dental prosthetic frameworks, substantially comprising: 
 from 25 to 32 wt % of Cr,    from 8 to 12 wt % of W,    from 0.05 to 0.4 wt %, in each case, of one or more elements in Group 4a and/or    Group 5a of the Periodic Table,    production-related impurities,    the rest being cobalt.    
   
   
       2 . The alloy as defined in  claim 1 , having a total content of Group 4a and/or Group 5a elements of from about 0.05 to about 0.4 wt %.  
   
   
       3 . The alloy as defined in  claim 1 , wherein the Group 4a and/or Group 5a elements are selected from the group consisting of titanium, zirconium, niobium, and tantalum.  
   
   
       4 . The alloy as defined in  claim 3 , wherein the alloy is substantially free from the elements iron, vanadium, nickel, molybdenum, and carbon.  
   
   
       5 . The alloy as defined in  claim 1 , wherein the alloy additionally contains a fraction of Mn in the range of from 0 to 1.0 wt %.  
   
   
       6 . The alloy as defined in  claim 1 , wherein the alloy additionally contains a fraction of Si in the range of from 0.8 to 1.6 wt %.  
   
   
       7 . The alloy as defined in  claim 1 , wherein the alloy additionally contains a fraction of N in the range of from 0.1 to 0.35 wt %.