Brass alloy

Abstract

The invention relates to a brass alloy substantially consisting of copper and zinc. The alloy has at least one additional alloy component. A lead content is at most 0.1 weight percent. The zinc fraction is 40.5 to 46 weight percent. The alloy comprises a mixed crystal having fractions of an alpha micro structure and of a beta microstructure. The weight proportion of the beta microstructure is at least 30% and at most 70%.

1 - 19 . (canceled) 
     
     
         20 . A brass alloy for use in manufacturing semi-finished products which is intended for a chip-removing processing, the brass alloy consisting essentially of copper and zinc, as well as at least one additional alloy component, wherein a content of lead is at most 0.1 percent by weight, the proportion of zinc is 40.5 to 46 percent by weight, and the proportion of copper is at most 59 percent by weight, and the alloy includes a mixed crystal with proportions of an alpha-structure as well as a beta-structure, wherein the proportion of the beta-structure is at least 30 percent by weight and at most 70 percent by weight, and the proportion of each additional alloy component is at most 1.0 percent by weight and a sum of proportions of all additional alloy components is at least 0.5 percent by weight. 
     
     
         21 . The brass alloy according to  claim 20 , wherein the proportion of copper is 54 to 59.0 percent by weight. 
     
     
         22 . The brass alloy according to  claim 20 , wherein the proportion of zinc is about 42 percent by weight, 
     
     
         23 . The brass alloy according to  claim 20 , including proportion of iron of 0.1 to 0.5 percent by weight. 
     
     
         24 . The brass alloy according to  claim 23 , wherein the proportion of iron is 0.2 to 0.3 percent by weight. 
     
     
         25 . The brass alloy according to  claim 20 , including a proportion of nickel of 0.1 to 0.5 percent by weight. 
     
     
         26 . The brass alloy according to  claim 25 , wherein the proportion of nickel is 0.2 to 0.3 percent by weight. 
     
     
         27 . The brass alloy according to  claim 20 , including a proportion of silicon of 0.01 to 0.20 percent by weight, 
     
     
         28 . The brass alloy according to  claim 27 , wherein the proportion of silicon is 0.03 to 0.08 percent by weight. 
     
     
         29 . The brass alloy according to  claim 20 , including a proportion of manganese of 0.01 to 0.20 percent by weight. 
     
     
         30 . The brass alloy according to  claim 29 , wherein the proportion of manganese is 0.03 to 0.08 percent by weight. 
     
     
         31 . The brass alloy according to  claim 20 , including a proportion of tin of 0.1 to 0.5 percent by weight. 
     
     
         32 . The brass alloy according to  claim 31 , wherein the proportion of tin is 0.2 to 0.3 percent by weight. 
     
     
         33 . The brass alloy according to  claim 20 , wherein a proportion of substances which are not copper, zinc, iron, nickel, silicon, manganese or tin, is less than 0.2 percent by weight. 
     
     
         34 . The brass alloy according to  claim 20 , wherein the proportion of the beta-structure is at least 50 percent by weight. 
     
     
         35 . The brass alloy according to  claim 20 , including by weight Cu 55-56%, Fe 0.2-0.3%, Ni 0,1-0.2%, Si 0.01-0.03%, Mn 0.1-0.2%, Sn 0.3-0.5%, remainder Zn. 
     
     
         36 . The brass alloy according to  claim 20 , including by weight Cu 57-57.5%, Fe 0.2-0.3%, Ni 0.2-0.3%, Si 0%, Mn 0%, Sn 0.2-0.3%, remainder Zn. 
     
     
         37 . The brass alloy according to  claim 20 , including by weight Cu 56-56.5%, Fe 0.4-0.5%, Ni 0.2-0.3%, Si 0%, Mn 0.1-0.2%, Sn 0.35-0.5%, remainder Zn. 
     
     
         38 . The brass alloy according to  claim 20 , including a maximum content of phosphorus of about 0.1% by weight.