Copper-base alloy

Abstract

A copper-base alloy includes 63.5 to 69.0 mass % of Cu, 1.2 to 2.0 mass % of Sn, 0.15 mass % or less of Fe, 0.1 to 2.0 mass % of Pb, 0.01 to 0.2 mass % of Al, 0.06 to 0.15 mass % of Sb, and 0.04 to 0.15 mass % of P when the copper-base alloy includes 63.5 mass % or more and less than 65.0 mass % of Cu, or 0.15 mass % or less of P when the copper-base alloy includes 65.0 to 69.0 mass % of Cu, with the balance being Zn and unavoidable impurities.

What is claimed is: 
     
         1 . A copper-base alloy comprising 63.5 to 69.0 mass % of Cu, 1.2 to 2.0 mass % of Sn, 0.15 mass % or less of Fe, 0.1 to 2.0 mass % of Pb, 0.01 to 0.2 mass % of Al, 0.06 to 0.15 mass % of Sb, and 0.04 to 0.15 mass % of P when the copper-base alloy comprises 63.5 mass % or more and less than 65.0 mass % of Cu, or 0.15 mass % or less of P when the copper-base alloy comprises 65.0 to 69.0 mass % of Cu, with the balance being Zn and unavoidable impurities. 
     
     
         2 . A copper-base alloy comprising 63.5 to 69.0 mass % of Cu, 1.2 to 2.0 mass % of Sn, 0.15 mass % or less of Fe, 0.1 to 2.0 mass % of Pb, 0.01 to 0.2 mass % of Al, 0.06 to 0.15 mass % of Sb, 0.04 to 0.15 mass % of P when the copper-base alloy comprises 63.5 mass % or more and less than 65.0 mass % of Cu, or 0.15 mass % or less of P when the copper-base alloy comprises 65.0 to 69.0 mass % of Cu, and either or both of at least one element selected from 0.01 to 0.45 mass % of Te and 0.02 to 0.45 mass % of Se, and at least one element selected from 0.001 to 0.2 mass % of Mg and 0.005 to 0.2 mass % of Zr, with the balance being Zn and unavoidable impurities. 
     
     
         3 . A copper-base alloy comprising 63.5 to 69.0 mass % of Cu, 1.2 to 2.0 mass % of Sn, 0.15 mass % or less of Fe, 0.5 to 1.5 mass % of Bi, 0.01 to 0.2 mass % of Al, 0.06 to 0.15 mass % of Sb, and 0.04 to 0.15 mass % of P when the copper-base alloy comprises 63.5 mass % or more and less than 65.0 mass % of Cu, or 0.15 mass % or less of P when the copper-base alloy comprises 65.0 to 69.0 mass % of Cu, with the balance being Zn and unavoidable impurities. 
     
     
         4 . A copper-base alloy comprising 63.5 to 69.0 mass % of Cu, 1.2 to 2.0 mass % of Sn, 0.15 mass % or less of Fe, 0.5 to 1.5 mass % of Bi, 0.01 to 0.2 mass % of Al, 0.06 to 0.15 mass % of Sb, 0.04 to 0.15 mass % of P when the copper-base alloy comprises 63.5 mass % or more and less than 65.0 mass % of Cu, or 0.15 mass % or less of P when the copper-base alloy comprises 65.0 to 69.0 mass % of Cu, and either or both of at least one element selected from 0.01 to 0.45 mass % of Te and 0.02 to 0.45 mass % of Se, and at least one element selected from 0.001 to 0.2 mass % of Mg and 0.005 to 0.2 mass % of Zr, with the balance being Zn and unavoidable impurities.