Copper Alloy

Abstract

Alloys are demonstrated based on copper, which have additions of manganese and sulfur and/or calcium as well as additional elements. The copper alloys are free from tellurium and lead, and are distinguished by high electrical conductivity and good machinability.

What is claimed is: 
     
         1 . An alloy based on copper, comprising:
 0.05 to 0.80 wt. % manganese (Mn),   0.10 to 0.80 wt. % sulfur (S), and   a remainder being copper (Cu) and unavoidable impurities.   
     
     
         2 . The alloy based on copper as recited in  claim 1 , further comprising at least one additional element selected from the group consisting of:
 0.002 to 0.05 wt. % phosphorus (P),   0.01 to 0.5 wt. % chromium (Cr),   0.01 to 0.5 wt. % aluminum (Al), and   0.01 to 0.5 wt. % magnesium (Mg).   
     
     
         3 . The alloy based on copper as recited in  claim 1 , wherein the manganese proportion is from 0.10 to 0.30 wt. %. 
     
     
         4 . The alloy based on copper as recited in  claim 1 , wherein the manganese proportion is from 0.10 to 0.20 wt. %. 
     
     
         5 . The alloy based on copper as recited in  claim 2 , wherein the manganese proportion is from 0.10 to 0.30 wt. %. 
     
     
         6 . The alloy based on copper as recited in  claim 1 , wherein the sulfur proportion is from 0.20 to 0.60 wt. %. 
     
     
         7 . The alloy based on copper as recited in  claim 2 , wherein the sulfur proportion is from 0.20 to 0.60 wt. %. 
     
     
         8 . The alloy based on copper as recited in  claim 3 , wherein the sulfur proportion is from 0.20 to 0.60 wt. %. 
     
     
         9 . An alloy based on copper, comprising:
 0.30 to 1.50 wt. % calcium (Ca), and   a remainder being copper (Cu) and unavoidable impurities.   
     
     
         10 . The alloy based on copper as recited in  claim 9 , further comprising at least one additional element selected from the group consisting of:
 0.005 to 0.05 wt. % manganese (Mn),   0.005 to 0.05 wt. % sulfur (S),   0.002 to 0.05 wt. % phosphorus (P),   0.01 to 0.5 wt. % chromium (Cr),   0.01 to 0.5 wt. % aluminum (Al), and   0.01 to 0.5 wt. % magnesium (Mg),   
     
     
         11 . The alloy based on copper as recited in  claim 9 , wherein the calcium proportion is from 0.5 to 1.0 wt. %. 
     
     
         12 . The alloy based on copper as recited in  claim 10 , wherein the calcium proportion is from 0.5 to 1.0 wt. %. 
     
     
         13 . The alloy based on copper as recited in  claim 1 , having an electrical conductivity of 35 to 55 MS/m. 
     
     
         14 . The alloy based on copper as recited in  claim 2 , having an electrical conductivity of 35 to 55 MS/m. 
     
     
         15 . The alloy based on copper as recited in  claim 9 , having an electrical conductivity of 35 to 55 MS/m. 
     
     
         16 . The alloy based on copper as recited in  claim 10 , having an electrical conductivity of 35 to 55 MS/m. 
     
     
         17 . The alloy based on copper as recited in  claim 1 , having an electrical conductivity from 48 to 53 MS/m. 
     
     
         18 . The alloy based on copper as recited in  claim 2 , having an electrical conductivity from 48 to 53 MS/m. 
     
     
         19 . The alloy based on copper as recited in  claim 1 , having a machinability index of 80% to 95%. 
     
     
         20 . The alloy based on copper as recited in  claim 2 , having a machinability index of 80% to 95%. 
     
     
         21 . A semifinished material made of an alloy as recited in  claim 1  in the form of a rolled product. 
     
     
         22 . A semifinished material made of an alloy as recited in  claim 2  in the form of a rolled product. 
     
     
         23 . A semifinished material made of an alloy as recited in  claim 1  in the form of an extruded/drawn product. 
     
     
         24 . A semifinished material made of an alloy as recited in  claim 2  in the form of an extruded/drawn product. 
     
     
         25 . A semifinished material made of an alloy as recited in  claim 1  in the form of a forged product. 
     
     
         26 . A semifinished material made of an alloy as recited in  claim 2  in the form of a forged product. 
     
     
         27 . A semifinished material made of an alloy as recited in  claim 1  in the form of a cast product. 
     
     
         28 . A semifinished material made of an alloy as recited in  claim 2  in the form of a cast product.