Copper-zinc alloy

Abstract

A copper-zinc alloy contains 66.0% to 73.0% by weight Cu, 1.5% to 2.5% by weight Si, 0.01% to 0.15% by weight P, at most 0.1% by weight Pb, balance zinc and also unavoidable impurities. The specified copper-zinc alloy is a lead-free brass alloy with improved dezincification resistance that can be produced cost-effectively indeed.

1 . A copper-zinc alloy, comprising:
 66. 0% to 73.0% by weight Cu;   1. 5% to 2.5% by weight Si;   0. 01% to 0.15% by weight P;   at most 0.1% by weight Pb; and   balance zinc and also unavoidable impurities.   
     
     
         2 . The copper-zinc alloy according to  claim 1 , further comprising less than 0.15% by weight As. 
     
     
         3 . The copper-zinc alloy according to  claim 1 , further comprising less than 0.10% by weight Al. 
     
     
         4 . The copper-zinc alloy according to  claim 1 , further comprising less than 0.25% by weight Sn. 
     
     
         5 . The copper-zinc alloy according to  claim 1 , wherein the Cu content is 68.0% to 72.5% by weight. 
     
     
         6 . The copper-zinc alloy according to  claim 1 , wherein the Si content is 1.6% to 2.3% by weight. 
     
     
         7 . The copper-zinc alloy according to  claim 1 , wherein the P content is 0.05% to 0.07% by weight. 
     
     
         8 . The copper-zinc alloy according to  claim 1 , wherein the Cu content is 68.5% to 71.0% by weight. 
     
     
         9 . The copper-zinc alloy according to  claim 1 , wherein the Si content is 2.0% to 2.3%, by weight. 
     
     
         10 . The copper-zinc alloy according to  claim 1 , further comprising:
 0% to 3% β-phase;   12% to 28% γ-phase; and   balance a-phase.   
     
     
         11 . The copper-zinc alloy according to  claim 8 , wherein the γ-phase content is 25% to 27%. 
     
     
         12 . The copper-zinc alloy according to  claim 1 , wherein the copper-zinc alloy has a dezincification depth of at most 200 μm. 
     
     
         13 . A manufacturing method, which comprises the steps of:
 providing the copper-zinc alloy according to  claim 1 ; and   producing components for drinking-water applications from the copper-zinc alloy.