Copper alloy with high strength and high electrical conductivity

Abstract

This copper alloy with high strength and high electrical conductivity includes: Mg: more than 1.0% by mass to less than 4% by mass; and Sn: more than 0.1% by mass to less than 5% by mass, with a remainder including Cu and inevitable impurities, wherein a mass ratio Mg/Sn of a content of Mg to a content of Sn is in a range of 0.4 or more. This copper alloy with high strength and high electrical conductivity may further include Ni: more than 0.1% by mass to less than 7% by mass.

1 . A copper alloy with high strength and high electrical conductivity, comprising:
 Mg: more than 1.0% by mass to less than 4% by mass; and   Sn: more than 0.1% by mass to less than 5% by mass,   with a remainder including Cu and inevitable impurities,   wherein a mass ratio Mg/Sn of a content of Mg to a content of Sn is in a range of 0.4 or more.   
     
     
         2 . The copper alloy with high strength and high electrical conductivity according to  claim 1 ,
 wherein the mass ratio Mg/Sn of the content of Mg to the content of Sn is in a range of 0.8 to 10.   
     
     
         3 . The copper alloy with high strength and high electrical conductivity according to  claim 1 ,
 wherein the copper alloy further comprises at least one or more selected from Fe, Co, Al, Ag, Mn, and Zn, and a content thereof is in a range of 0.01% by mass or more to 5% by mass or less.   
     
     
         4 . The copper alloy with high strength and high electrical conductivity according to  claim 1 ,
 wherein the copper alloy further comprises B: 0.001% by mass or more to 0.5% by mass or less.   
     
     
         5 . The copper alloy with high strength and high electrical conductivity according to  claim 1 ,
 wherein the copper alloy further comprises P: less than 0.004% by mass.   
     
     
         6 . The copper alloy with high strength and high electrical conductivity according to  claim 1 ,
 wherein a tensile strength is in a range of 750 MPa or more, and an electrical conductivity is in a range of 10% IACS or more.   
     
     
         7 . The copper alloy with high strength and high electrical conductivity according to  claim 1 ,
 wherein the copper alloy further comprises Ni: more than 0.1% by mass to less than 7% by mass.   
     
     
         8 . The copper alloy with high strength and high electrical conductivity according to  claim 7 ,
 wherein a mass ratio Ni/Sn of a content of Ni to a content of Sn is in a range of 0.2 to 3.   
     
     
         9 . The copper alloy with high strength and high electrical conductivity according to  claim 7 ,
 wherein the copper alloy further comprises either one or both of P and B, and a content thereof is in a range of 0.001% by mass or more to 0.5% by mass or less.   
     
     
         10 . The copper alloy with high strength and high electrical conductivity according to  claim 7 ,
 wherein the copper alloy further comprises at least one or more selected from Fe, Co, Al, Ag, Mn, and Zn, and a content thereof is in a range of 0.01% by mass or more to 5% by mass or less.   
     
     
         11 . The copper alloy with high strength and high electrical conductivity according to  claim 7 ,
 wherein a tensile strength is in a range of 750 MPa or more, and an electrical conductivity is in a range of 10% IACS or more.